22re Rough Idle On Warm Start


I have a 22RE in my truck that had been running fine. On a hot day, after a long drive and after the car sitting (not running) in the sun, the car would idle/surge erratically on a hot start. The Fuel Presure engine cold, KO - EO has been to 60 psig. engine light is on and temp. 2 had some similar problems after belt was fitted caused miss fire when warmed up, fitted new leads as they lit up in the dark, but didnt cure it, turned out to be timing belt one notch out, started great. During starting, the starter cranks but no start for a long time (10-15 seconds). After the first few seconds, its idles rough. Idle settled @ around +/- 750 upon reaching operating temp. After it heats up, it may be slightly rough, but is mostly gone. was created by aircooled_Alex Hey guys. Meanwhile, cold plugs don't get as hot. guage goes up to normal operating temp. Why does my car idle rough (sputter) and smell like gas? 93 nissan altima dohc 4cyl manual trans At first my car was in safe mode, it wouldn't rev past 2500 rpms. The car exhaust port is important as it neutralizes many of the harmful fumes that come out of the engine. Its still very hard to start and won't idle at all. Spent a few hours on the Yota Tech web site researching what others have experienced. Hi im hoping you can help, my car has rough idle, exhaust sputtering and a hard start (only when car is warm, it starts first turn of key in morning and also if car has only just stopped vut if I leave it for between 30mins-6hours its hard to start) ive had a diagnostic done which showed no codes, I have cleaned maf sensor and idle air control valve, I have changed air filter and spark plugs. Other bank of plugs (odd #) looks good. Having a rough idle problem with an '87 TII motor. Seems to be worse when the truck is warmed up? (Seems opposite of what I'd expect for a problem like this?) The truck has 125k miles. base idle screw is adj to obtain IAC %. I don't think it's a fuel pump since once its started it runs great, but not sure what else it could be. A workaround is treating it like it is flooded. It bounces around between 600-900 rpm sometimes when at a stoplight. Lean Surge Bucking (Solved), Hard Start (Solved), Rough Idle by Bav3. Is your Idle Speed Screw loosening by itself keeping the motor from idling properly? Is it stripped out from all of the adjustments over the years? Is it even on the throttle body anymore or did it fall out? LC Engineering is producing these custom Stainless Steel Idle Speed Screws on our CNC lathe to solve your problem. Run engine until normal operating temperature has been reached and then allow to idle. it is having a hard time starting and idling when first started, after it warms up it runs fine, except when i come to a stop at a. If I push the gas petal to raise the RPM, the car runs fine. Truck runs okay on start up but within 1-2 minutes starts running rough at idle and gets worse when put into gear. Rough Idle/Engine Hesitation when engine hot was created by 96Pontiac Okay so I looked around on the forums both for the codes I have and my problem my 1996 Pontiac Grand Am (2. On V type engines having two manifolds, make separate tests on each manifold. When a Ford Focus exhibits problems with running roughly at idle speeds, auto mechanics generally look first to either a vacuum problem, or more often, a problem with water getting into the Differential Pressure Feedback Sensor (DPFE), a part of the EGR (exhaust gas recirculation system). It could be a couple other things, too, but those are the most common and first things you should explore. It seems to be loosing it's prime. its Replace the needle and seat in the carby , it's worn and flooding the engine at low speed. I have a ’90 Toyota 4Runner with a 22RE fuel injected engine having 176000 miles. framingjohndeloreanfilm. Hot plugs allow less heat transfer from the ceramic and thus burn off more deposits. Turns out it was a vacuum leak at the intake manifold plenum. Rough idle is about 400-650 rpm. Plugs, Cap, Rotor, I just replaced. Re: 1996 F-150 (5. idle speed valve. Then the rough idle and sputtering cruising at low rpm is gone. They are a good indicator of many problems that occur and can save a lot of time isolating the problem. once the RPMs are up, it will smooth out , but it idles very rough, like it is missing or something. sometime it is hard running on first gear and sometime it seems smooth. replace egr valve. Been having a rough idle problem and have not been able to diagnose what is wrong. The ignition coil is responsible for taking power from the battery and relaying the power to the spark plugs. I took it for a drive, and it ran great. Recently bought a 92-93 E320 distributor type (not HFM/ no air mass sensor). Recently bought a 92-93 E320 distributor type (not HFM/ no air mass sensor). When I got back to the yard I shut her off for about 10 min. I have a 94 toyota pu 22re that runs rough at idle only when vehicle is warmed up to operating temp. 0 L6 automatic Let me first start off by saying I recently took a swim with my Jeep accidentally while trying to pull a friends Ranger out of the local swimming hole. How U going? I'm an ex ford mechanic and have worked on shitloads of AUs with rough idle. Something of interest is that when the you put the vehicle in Drive and press on the brake, the idle gets worse. I'm sure the idel problem has always been there but only really noticed when it stalled. Also, after it dies, it will start back up, as i stated, then it goes into surge at idle, but I have found that if i just sit there and let it surge, it will eventually flatten out and idle pretty much normal. I am getting fluctuating rpm on warm startup, but not when the engine is cold or hot. White smoke and/or coolant odor may come from the exhaust for an extended period of time at cold start as well. Idles good at initial start (very cold in Ohio) but after 5 minutes begins to idle rough. On a cold start the engine turns over quickly and idles very smoothly. I've experienced the stalling a few times when it idled really low coming to stop in neutral. LH-2 Cold Idle Problems -Bad ECT or O2 Sensor and Wiring Harness Notes (BB)The block temperature sensor (ECT engine coolant temperature sensor under the intake manifold) plays a big part in cold running decisions and could pre-maturely allow the O2 sensor signal being used before the engine is warm. This is an ancient thread but I didn't want to start a new thread based on the same issue. hi all, i am having rough idle problems with my 4. Toyota Camry won’t start and has rough idle and hesitation If you’ve got a No Start Toyota with a 4-cylinder 2. Rough Idle/Engine Hesitation when engine hot was created by 96Pontiac Okay so I looked around on the forums both for the codes I have and my problem my 1996 Pontiac Grand Am (2. Okay, I've been reading since I got my WRX, about the rough idle issues. rough idle and cutting out "UPDATED HELP!!" my truck started idling rough after starting and does it a while (hot or cold eng) after starting until i drive 20 min or so it also has cut out twice now in a week i installed an ez @3 weeks ago maybe it??. Warm re-start, low and rough idle? I noticed on my 2017 Fusion Sport that after a warm restart (shut off car for 3 hours) the idle speed is the hot/warmed-up idle speed (600 RPM) and it kind of stutters. Average repair cost is $100 at 110,750 miles. Run engine until normal operating temperature has been reached and then allow to idle. it runs fine when i first start it, but soon idles low/rough, but only in gear. I pulled the code just have no idea what it is related too. Heres what my issue is like. 5L I have an issue with my A/C where it seems mildy cold/luke warm at idle, but offers a definite cooling at speed. Since there are a few hundred things it CAN be, I recommend starting with the basic stuff first. What to Look For. This is not the first time I've had this problem. Running Problems. my 22RE has idled rough before, just not this bad, it drives great, cold idle is good but when it warms up, it starts idling rough and sometimes so slow it dies, i can drive it and stop at a stop. Then it will return and hold normal idle. Runs great but has a rough idle. Hello, I've just bought my first BMW in my life. The engine runs cuts entire lawn but sputters instead of running smoothly. Starting, car starts right up and jumps to 2k rpms or whatever when starting, and when its settling back down sometimes it will just die, otherwise idle will drop extremely low to the point of it not registering on the tach, and then idle back up. UNABLE TO MAINTAIN IDLE OR LOW/ROUGH IDLE AT START Engine Running and Warm Up 1. Get the bike to temperature and then lower the idle till the bike stumbles and idles rough. I have a 94 toyota pu 22re that runs rough at idle only when vehicle is warmed up to operating temp. During driving everything is fine. com, but we greatly appreciate you Darin, for all your hard work!. idle is fine on normal hot day 750 -900 and a little low 500-600 rpm on cold weather in the morning or night. Engine drivability strategy is much different under cold start conditions. It may also Run rough when warm, slight knock, no codes setting. You may have a misfire, a vacuum leak, or a clogged/faulty idle air control valve. This "start-up" condition occurred for about 3000 miles and has since gone away. tested the coil, appeared to be bad. 3 Rough Idle, Hard Warm Start, and Blue Haze from Exhaust If they are our injectors we will gladly take a look for you if you want to send them in. Re: Need help cold start rough idle! I have about 1400 Mikes on RZR 1000 S and just checked my Valves and they were all in spec but on the tight side (Lower Spec), mine is running fine, just thought I would throw that in. Example: If you have a late 22RE cylinder head that has a measured deck height of 3. I had a 22re that idled rough. RE: Rough idle on first start IP: Logged Message: I have a 2000 Dakota,v-6 3. The engine struggles to keep it above 7-800 RPM. But I've driven the car over 100K, and its only just started to happen. Re: 258 cj7 rough idle; won't idle It's been years since I've timed a CJ, but I was researching your problem. So far been 2 different mechanics - 1st one wasn't sure and said take it to somewhere that's good with the. In the summer the car randomly does a rough start but seems to return to a normal idle sooner then on very cold morning startups like in the winter. Porsche 928: Why Does My Car Idle Roughly? Having a rough idle can be a pain in the neck, and you'll want to get it diagnosed as soon as possible. At idle it is rough ("lopes?"), Lots of black smoke, smell of gas, and when I let off the gas if will stutter and backfire, plugs are black and sooty, but not oily, (rich?). It happens when I start my warm engine, it runs rough for 30 seconds and I even feel a 2 seconds delayed accelerator response like if I had low fuel pressure. " Before I start tearing stuff down & ordering parts, I wanted to see if anyone else had a determination on. I recently found a problem with my truck. Reset Idle Learn = The Idle Air Learning can be reset to a default value (16 steps) - by setting this control value to 1, and turning the key off and waiting for the system to completely power down. A: Low fuel pressure results in several issues for the engine, including rough idle, poor performance and decreased fuel economy. The needle starts jumping up and down and the variation starts getting worse the longer the car sits. I can go out and start up my truck when it is cold and it runs fine. When you first start in the morning, it will run at the elevated RPM, but when it starts to drop back down to the normal idle, it will start to run rough and the RPM can drop to about 300 RPM and then jump back up to 1000 RPM. I also can't figure out how to test the Idle Control Valve (Air Valve). 1988 Toyota Pickup Rough Idle and Hard Start When Warm only occurs when the engine is warm But I'm not certain. One of the best indicators of a failing fuel pump is found on the open road. If I blip the throttle it will clear up a bit but goes right back to the low idle. my truck does something similar. When I come to a light it doesn't idle great but its not bad. When I try to start it up again it starts idling rough for about 45 seconds until the rmps even out and stay constant at its regular idle. com, but we greatly appreciate you Darin, for all your hard work!. diagnostic tips Ford 7. Recently (within the past two days) I've been having a rough idle in a warm start up problem. 92 Toyota Pickup surging idle issue 86 Answers. " Start with the easy checks first. This method allows the computer to do an accurate analysis of the air entering the engine. Might run up to wot throtle for sec then stumble out of fuel. Symptom 2: On warm start, the engine will start, but within 5 seconds die. Rough idle/misfires when cold. Then yesterday it just craps out and won't idle. OK, some more info I found a loose vacuum hose (carbon canister to the throttle housing). When the car has been off and sitting for 30 minutes or longer and still warm it is very difficult to crank and it runs very roughly when it finally catches. Don't forget the hose between the charcoal canister purge valve and the intake manifold. Normally runs GREAT. 5L) So this has only happened a few times but I will try to explain it as much as possible. Wasn't either component. Page 2- rough idle on hot start Service & Maintenance. A: Low fuel pressure results in several issues for the engine, including rough idle, poor performance and decreased fuel economy. 110", then it is probably safe to say that the head has been "decked" approximately 0. My truck never gets up to 180 degrees in the winter except for once in a while. It doesn't matter hot or cold, there is no pattern. Id say the idle is around 700rpm at cold, maybe 650. 88 Ford Ranger runs rough at idle: My ranger wont start when it is cold out. FREE BEER if you have the answer! Fuel pump works fine as the fuel level in the port glass on the carb is correct and constant when running. Once the car is warmed up and then turned off, after re-starting, it has a rough idle and up to about 2500 rpm. Finally figured it out! The O ring on the idle screw had deteriorated so it couldn't hold an adjustment. I have been trying to figure out the reason for a rough idle ( only when in drive, it does ok when in park or neutral ) FOR ABOUT 15 OF THOSE YEARS. So sorry about the cry for help. If it DOES start up, then I have all the same symptoms, rough idle, belching and shaking up to 3000 rpm, then when she's on plane she just rips. 1994 toyota pickup running rough, no power and a strong gas smell Its a hot start issue. Checked the plugs, they are all in good condition. It could be a couple other things, too, but those are the most common and first things you should explore. 020" of re-surfacing or use a head shim to achieve proper deck height. After a while the engine will "stumble" and cut off. I recently found a problem with my truck. diagnostic tips Ford 7. Warm re-start, low and rough idle? I noticed on my 2017 Fusion Sport that after a warm restart (shut off car for 3 hours) the idle speed is the hot/warmed-up idle speed (600 RPM) and it kind of stutters. Is your Astro high mileage? Over 100,000 miles? Could be the EGR valve. Runs great but has a rough idle. After the engine has been running for about 5 min or so (RPM's roughly 600 to 800)and I come to a stop light/sign it will start idleing rough but will. 0 CDTI EcoFlex - rough idle on cold start; 2009 insignia ecoflex 2ltr diesel - wont start when warm. After letting the engine warm up for 5-10 minutes, it will run smooth if I shut it off and restart. I thought it might be a leaky fuel injector, but it does not show up in the UOA. Engine drivability strategy is much different under cold start conditions. If I rev the car, even only one time, to 3k RPM the idle is fixed. You'll need to make sure the air/fuel ratio is maintained during cold start. A sooty spark plug could just mean the engine is burning oil at that cylinder. This issue only occurs after I warm the vehicle up fully and after it has been turned off. 92 Toyota Pickup surging idle issue 86 Answers. I thought it might be a leaky fuel injector, but it does not show up in the UOA. Previously, it'd only happen during a cold start in hot weather. SOURCE: 1985 toyota 4x4 22re missing and rough idle Have you pulled out the spark plugs to see if there are any tell tale signs on them. It has gotten so bad now that I have to do something. I don't even know where to start with trying to fix the idle adjustment screw, it looks to me like I have to replace the whole dang throttle body to fix that. Often a big cam requires you to open the throttle so far that the curb idle adjustment needles won't work. problem is when starting car while it is still hot from the previous start, the rpm reading goes as follows. Average failure mileage is 152,000 miles. Turned out to be a cracked intake hose. A good test for that is pump up the ball filling the vst with engine off. it only idles slightly rough in the winter. Rough Idle and unresponsive acceleration 2 Answers. 2L EcoTec with 145k on it. Most of the China bikes say idle should be set at 1500rpm. This is a general guide which will list symptoms for 944 starting and running problems and common causes of those problems. On a cold start it high idles just as it should. Upon 1st start up of the day, rpm was a bit rough for less than a minute but didn't stumble below 1k til it got warmer. After a little revving and waiting, the idle seems ok, and I drive off. Hi all, first, I have an 08 Heritage Softail Classic with basic stage 1 with Dobec Gen3. Runs fine cold. Re: LOW ROUGH IDLE, Sometimes dies! I had all the same crap, did all the same stuff everyone else above did, made some gains however the bottom line for my truck was a Throttle Positioning Sensor. They are a good indicator of many problems that occur and can save a lot of time isolating the problem. Thought it was a coil pack, EGR valve. Anyone else have this?. Seems to be worse when the truck is warmed up? (Seems opposite of what I'd expect for a problem like this?) The truck has 125k miles. Run engine until normal operating temperature has been reached and then allow to idle. Then, it will be smooth from then on out. If I let it completely warm up or take off down the road and it warms up on its own it starts running rough. Bought my first BMW last month'06 330i, 36,000 miles CPOhave been noticing that it idles kind of rough and has a somewhat rough start up when it sits for a little bit (several hours), didn't think much of it until yesterday when I started it up after work and it really acted up. Id say the idle is around 700rpm at cold, maybe 650. Re: Cold start = rough idle until warm up That sounds like it might be a very rich condition during warm up. Suspected the mass airflow sensor so I changed it. Cold start is fine and idles normally. 1995 Toyota Pickup. Here is a typical fix au idle list( need access to NGS or WDS diagnostic systems) Check IAC % is 30-35%. I own a 1995 Toyota Pickup. idk if that is a problem or not. Signals of trouble in fuel pump. When you first start in the morning, it will run at the elevated RPM, but when it starts to drop back down to the normal idle, it will start to run rough and the RPM can drop to about 300 RPM and then jump back up to 1000 RPM. The idle has been rough for a few months. The PCV may cause a rough idle, hard starting and lean misfire (which increases emissions and wastes fuel). If a car is moving at an accelerated speed, perhaps above 50 miles an hour, and the vehicle starts jerking and then resumes regular performance, it might not be a bad spark plug. I also can't figure out how to test the Idle Control Valve (Air Valve). Re: '74 345 long warm up/rough idle/stutter Even with fairly high ambient temps, the engine and internal fluids are still relatively cold during initial start up. This leak will result in a decrease in fuel efficiency, and in some cases performance and acceleration. Just wondering what the cause of a rough idle only when the Outback is in gear and at a stop. Connect the vacuum gauge hose as close to the intake manifold as possible and start engine. rough idle on hot start I've been having an issue for the last couple months, and it seems to be getting worse. How U going? I'm an ex ford mechanic and have worked on shitloads of AUs with rough idle. If you notice a nasty smell from the exhaust, such as a rotten egg smell, then there is a problem. Cold start is fine and idles normally. It hooks to the A/C idle up diaphragm and it raises the idle slightly when you turn the A/C on to keep it from having a low/rough idle with the a/c on. Re: Need help with XK8 rough idle-no run problem. You may have to register before you can post: click the register link above to proceed. A sooty spark plug could just mean the engine is burning oil at that cylinder. I just put in new plugs, wires, Cap, coil, rotor, valve cover breather on pass. Dodge Dakota Forum for Dodge Dakota trucks with an interactive site including Dodge Dakota Forums, Pictures, Links, Message Boards, and Chat Forum Rough idle and. The sensor basically looks at idle or closed throttle (IDL) and throttle angle opening (VTA). Welcome any feedback. it also seems the longer i sit the worst it gets. Engine Hard to Start or Will Not Start (Exhaust Smoke Present) Engine Cranks But Will Not Start (No Smoke From Exhaust) Engine Starts But Will Not Keep Running; Engine Will Not Shut Off; Rough Idle, Warm Engine; Engine Surges at Idle. Rough Idle/Engine Hesitation when engine hot was created by 96Pontiac Okay so I looked around on the forums both for the codes I have and my problem my 1996 Pontiac Grand Am (2. when i put it in park or nuetral it idle up but it still lopes. 3, I start it up and she runs at high idle nice and smooth however when she warms up it begins to idle rough when I rev it up she revs up smooth and when the rpms come down the thing damn near dies sometimes it does and sometimes it'll catch and keep on running at a rough idle. When the engine is cold (RPM's around 1,000) theres no idle problem when I come to a stop light/sign. Also, after it dies, it will start back up, as i stated, then it goes into surge at idle, but I have found that if i just sit there and let it surge, it will eventually flatten out and idle pretty much normal. Id say the idle is around 700rpm at cold, maybe 650. 4 V-6 with 72K. If it DOES start up, then I have all the same symptoms, rough idle, belching and shaking up to 3000 rpm, then when she's on plane she just rips. I have been chasing a rough idle on a 2002 Seville SLS. It drops to 600 RPM at a stop then will just shut down, like I turned the key off, no rough idle then stall. When it gets warm it drops to about 1000 I read on the internet a bit about it, but am confused a bit. After doing that, it'll idle and drive fine. Worst after stationary idle, but also after moving at low to medium speed with closed throttle and then accelerating. 1 L Vortec (99,000 miles), and when warm, it's hard to start, You must hold the key on start for 10 or 15 seconds, and then the motor stumbles to life at idle, and in 5 to 10 seconds, it's cleared up and runs great. Is your Astro high mileage? Over 100,000 miles? Could be the EGR valve. It seems to be more prevalent in the winter when it's colder. Not terrible shaking but noticeable. If the sensor is duff it may think the engine is cold when it's not and over fueling as they do on a cold start. Sometimes misfire carries over to #1 plug. When I start the truck, it starts up okay, then after 5 seconds it goes into a bout of gurgling/running rough for 20 seconds, then it levels off after the RPM's jump 100-200 RPM's then slowly eases back down. It won't start without pumping the throttle and dies when I don't give it some gas. What causes a 1991 Mercedes-Benz 190E 2. Rough idle after cold start Help, Advice and DIY Tutorials on Volvo's extremely popular car line -- Volvo's 1990s "bread and butter" cars -- powered by the ubiquitous and durable Volvo inline 5-cylinder engine. 0 Powerstroke that is also causing a hissing noise. The car starts up without any issues when cold and seems to run just fine when warmed up. Symptom 3: Rough idle. Someone suggesting a rocker arm. Morning all - with my 118tsi Golf - on start up after about 5-10secs it turns to a really rough idle, but is revving around 1100-1350rpm. This fixed the high idle while moving problem. Then it will return and hold normal idle. blah, blah, blah. The battery was dead when I got it, sticker indicated a 2004 date so not suprising it wouldn't work. Hey guys, I have a bone stock 2004. This is a good example of how basic engine diagnostic tests can work to pinpoint the root cause of the cars problem. He let it sit for a couple of hours and then took note of the rough idle. Has always been an issue but got worse recently. Seems to be in order. 0 runs smooth but idles rough and sometimes hard to start, other times fires right up. idle speed valve. On a cold start the engine turns over quickly and idles very smoothly. On a cold start it high idles just as it should. I'm guessing it's one of two issues, either the carb is choked up with dried gas or there is a vacuum leak somewhere. 2 liter and here is what is happening to it. It will also vibrate when you are running idle at a stop sign or intersection. It drops to 600 RPM at a stop then will just shut down, like I turned the key off, no rough idle then stall. It runs fine at higher RPM's but runs really rough, shakes and sputters at lower RPM's. my truck does something similar. Rough Idle. White smoke and/or coolant odor may come from the exhaust for an extended period of time at cold start as well. Usually it will turn over fine, then the idle drops way down, sputters and shudders for a few moments, and dies. This is a tell-tale sign that there is a hair line fracture in the ECU's circuit or in one of the coil's windings that separates and loses connection when it gets hot and expands. Today I resolved the issue but I'm not sure what exactly I did that resolved it or what the original c. Seems to be worse when the truck is warmed up? (Seems opposite of what I'd expect for a problem like this?) The truck has 125k miles. When started (cold), it idles bad and has "fits" where it tries to stall, or revs up quickly to 1500 on its own. I have not taken it in yet to my dealer. When driving around town, it accelerates perfect, it cruises perfect, but when I come to a stop, I have this rough idle. Once again I verified valve settings and replaced the injectors with rebuilt units. Morning all - with my 118tsi Golf - on start up after about 5-10secs it turns to a really rough idle, but is revving around 1100-1350rpm. 96 Jeep Cherokee rough idle and stalling problem. Then it will return and hold normal idle. It seems to do this in a matter or hours and goes back to the rough idle, hard start and will bog when pulling away from a stop sign. It has 253,000 miles but still runs great except at warm idle. It starts and idles great during a cold start, but whenever I start it when the engine is warm it idles very low and sometimes cranks but doesn't start. driving down the road it does fine, never sputters or struggles, but once i stop at a light it starts the rough idle. 1988 Toyota Pickup Rough Idle and Hard Start When Warm only occurs when the engine is warm But I'm not certain. So I called the dealer and described the symptoms- idle speed surges and drops for the first 5-10 seconds and then. On a cold start the engine turns over quickly and idles very smoothly. But you put it in gear and drive away and it quickly goes away. If I start the car in the am it will catch fine but the idle is too low for 10 seconds or so and then seems fine, warm or hot start its normal. 110", then it is probably safe to say that the head has been "decked" approximately 0. 7L is an odd fire v-6 and when the odd cylinder fires it causes vibration (rough idle) i don't know if any of the above are true?. This has been problem from beginning. Heres what my issue is like. and, as others will mention, clean the iac valve as well as the maf sensor (very carefully). If you find a plug in this condition, check the rest of them. 1988 Toyota Pickup Rough Idle and Hard Start When Warm only occurs when the engine is warm But I'm not certain. 9 it has a rough idle,when I start it I put new tune up the works what could it be please let me know anyone thanks ya Dodge Dakota JOIN HERE 5/09/2011 15:12:06: RE: Rough idle on first start IP: Logged Message: #1 Leaky injector or injectors. also proformed efi service still very rough at idle has stalled at times. 8L Windstar runs fine except often times on a warm start, it idles real rough, almost like its missing. Has always been an issue but got worse recently. rough idle and sometimes hard to start 9 Answers. 1) If possible, change the hot start initial map to a target idle of about 1100-1500RPM. I will check the fuel pressure again. You’ll need to make sure the air/fuel ratio is maintained during cold start. More: Violent, one time, shake on cold start is a product of a low idle. If the engine is warm the rpm should not change when the idle adjustment screw is closed. The engine was turning over very fast but she would not fire. Connect the vacuum gauge hose as close to the intake manifold as possible and start engine. When I start my engine cold, it idles just fine. Q: Been having this issue with a 2007 F-150 (5. It idles terribly. blah, blah, blah. car cold starts rough, doesnt hesistate, fires up within a sec of turning the key but the engine shakes like its missing or something out of balance, once its warmed up it feels like it has a hiccup every 3 or so seconds, no sound but a shake you can feel in the seat every 3 secs, regardless of clutch position, and throws no codes. It was a rough idle and the exhaust was dirty. idk if that is a problem or not. I've been wanting this for a long time now, so I am very happy, although there is much work ahead. Also when it is very warm, it drives awfully, it missfires a lot and it seems like it has got no torque at low revs at all. I've replaced coolant temp sensor, air filter, spark plugs, wires, cap and rotor, ran injector cleaner through gas and cleaned throttle body/idle air control valve. Page 2- rough idle on hot start Service & Maintenance. Example: If you have a late 22RE cylinder head that has a measured deck height of 3. I've checked the coil pack and it tested with in the acceptable limits. No codes showing(per my cheap bluetooth code scanner). The issue is on startup after driving car and fully warming up and shutting down for 20 minutes. And I went to start it ( not knowing) and it, to my surprise, idled. The truck is a 1993 toyota pickup with the 2. Hi im hoping you can help, my car has rough idle, exhaust sputtering and a hard start (only when car is warm, it starts first turn of key in morning and also if car has only just stopped vut if I leave it for between 30mins-6hours its hard to start) ive had a diagnostic done which showed no codes, I have cleaned maf sensor and idle air control valve, I have changed air filter and spark plugs. floods at start up poor gpm stutters after shifting then bogs down while accelerating, smooths out after letting up clatter while accelerating like it has low octane rough idle when sitting for awhile, sometimes idle will rev very high after shifting check engine light is operational at start up but is not staying on for codes. Warm re-start, low and rough idle? I noticed on my 2017 Fusion Sport that after a warm restart (shut off car for 3 hours) the idle speed is the hot/warmed-up idle speed (600 RPM) and it kind of stutters.