Golf IV / Jetta IV :: Random Hard Start After Car Is Warm / No CEL
Jun 7, 2015
I have a 99.5 golf gls with an 02' engine in it. 5 Speed, neuspeed supercharged with a bunch of other stuff done to it.
I've had this issue as long as I've owned the car (3-4 years). Starting the car cold, it usually fires right up and can drive it e, no problem. However, when I get the car up to operating temp and turn the car off, if I immediately try and restart the car it either :
A.) chokes but will fire or
B.) will have a long crank and usually starts hard.
Another thing I noticed is that at low RPM right after the clutch has been engaged, the car seems to almost hesitate like something is holding it back, even if I give it more gas. I have checked my codes with Vag com and the only CEL I have it for not having a post cat o2 sensor (picks up that the heater circuit is unplugged). I also have run some diagnostics on my fuel trim and both long and short term fuel trim are within spec. I tested two different mafs and both were around 2.5g/s at idle. Checked for vac leaks and didn't have any.
I have read that a dead/dying crank sensor can give me the symptoms I have, but I seem to be lacking a symptom where the CEL is on for the sensor, and my car doesn't randomly die when driving. So my question is, have any of you had the same symptoms but no CEL?
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So, the very first time it happened was the weekend after I installed my new motor mounts I am not sure if it is a coincidence or if there was something that I touched while installing that is causing the car to act this way. So I notice that it's more common on the wet days even though I have started to doubt this recently as well. The instrument cluster illuminates CEL and EPC for a brief second and the car feels like it looses all power and sometimes even stalls when at idle but then after that goes away it runs like a champ. Also ever since this started happening the car is really hard to start after it sits off for few minutes when at normal running temperature. Right, when it happened I tried to scan it and I thought it was the scanner that was not able to communicate with it but that wasn't it since I have tried over 10 different kinds now( that includes the ones that have scanned my car with no problem before). I did have the CEL to stay on once but I still couldn't scan it and it went away by itself or I have reset it by disconnecting the battery. Its really driving me crazy and I am stuck but not giving up on this car, I love it too much and it's been very faithful to me so far! I mean there was literally two days recently when the weather was dry when I drove the thing without the random occurrence of EPC and CEL but it still didn't want to start when warm. In fact, one time after work after it has been sunny all day it didn't want to start when the engine was still cold as well.
The things I have replaced or tried so far that have not repaired it are:
*New Camshaft Sensor
*New Crankshaft Position Sensor
*New Purge Valve
*New Coil Pack
*Took off and cleaned my Throttle Body
*Checked with and OHM meter as many grounds as i could find between battery and they all checked good(the main engine ground looks good)
*Cleaned MAF sensor
*New Coolant Temperature Sensor
*Checked that all fuses were good and seated
*Verified that the k-line is good.
*Able to scan the ABS module and radio through vag com so i know its something with the ECU communication
That's all that I can remember as of now. the car went through many stages but here is how it looks as of now.
[URL]
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My 2000 VR6 Jetta has an annoying problem of hard starting in warm weather. Last summer through fall when the weather was warmer, it would often crank but not catch. All winter it is fine. A jump will usually gets it after a while. Replaced the battery with limited success. I park in the shade whenever possible. It has the manf. alarm system, and, also, but not always, it is accompanied by key not turning off the alarm. Do not have remote. Replaced the Fuel Pump Relay. No success. Cannot predict, so I don't want to have it sitting at the dealer for days on end.
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I've got a 2004 wagon and occasionally, when it's warmed up, if I shut it off it's hard to start again. When I turn the key it fires up, but when I release the starter it dies, like I've shut the car off. Giving it throttle makes no difference. I have to do this several times, and then it keeps running. Never does it cold. No codes.
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Well first the exact car I have. 99.5 Jetta 2.0 AEG. It all started with one loud backfire with a stall at a stop light while in neutral. After that it was random stalling and jerking while driving. So I checked my everything and all seemed well. I replaced spark plugs because they where fouled and nasty. Cables are good. They're near new and tested them with a multimeter. Next I checked my injectors and they are surprisingly very clean.
I had also ran seafoam prior to these problems a few weeks before it all started. Next step was new fuel filter. Old one was nasty and black stuff dripped out. That didn't work. So I checked for vacuum leaks with throttle body cleaner. Nothing. Visually threre is nothing wrong under the hood. So today I changed the fuel pump. Went for a test drive all seemed well. Can out of the bank. Then it won't start. So I wait like normally. And it normally gets me home. Nothing. Will sometimes start but if I'm not holding the gas it dies. I don't know what to do. My only other thing I can think of is the coil pack.
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Mmkay.. 2000 GTI VR6.. Will start initially, when engine is cold (sat overnight, or through the work day) but once the engine is at normal running temp, if you shut it off, it wont start. Acts like its out of gas.. have to "prime" and keep hitting the gas pedal while cranking, to (sometimes) get it to start when warm, and then it runs like crap until I get a few miles down the road.
Brand new plugs and wires, and just this evening, pulled a plug, and its obviously fouled, and covered with unburnt gas. Coil Pack maybe?
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I have a 03 vw jetta gli and whenever the engine is warm when it was recently on, takes a while to start like 3-5 second but normal when it is a cold start..
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Car doesn't seem to want to start when warm.
1.8T AWD, 02J swap, no clutch switch (I can start without pressing the clutch).
Cold start, cranks and starts on a dime, after the car warms up and I've turned off the car, say went for a quick grocery run, the car won't start afterwards.
No cranking, nothing. Fuel pump primes, then not a sound. Everything on the dash lights up just fine. No starter motor noise, no clicking.... nada...
Fairly new starter motor pulled from a junkyard donor. Can't think of anything else.
Last time I got stranded in a parking lot, I gave it a few whacks with a tire iron and the car started just fine. Could it be a bad solenoid?
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Last Saturday I got gas on my way home from work then let my car sit all day. Sunday morning i go to start my car and it starts terribly along with a very rough idle. The ride to work was hideous as the car could barely climb a hill (max 25mph and high RPMs 3000 to 4000). Along with bad hill climbing power the car could barely get to 60mph.
I added a bottle of Gumout as I thought I might have gotten bad gas this had no result. While trying to figure out what was wrong I also replaced the air filter.
Fast forward to Tuesday I decide to inspect the fuses in the car and under the hood (all of which looks in good condition). I started the car before i went inside and it seemed the same as it has been all week. Wednesday morning I go to leave and the car refuses to start. It tries to start but immediately quits and then shakes wildly while trying to start. I have since changed the fuel filter, replaced 5 ignition coils, and given it 5 new spark plugs. The car is still doing the exact same thing it was Wednesday morning.
This is a VW Jetta 2005 2.5 Engine
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I just replaced my injectors in my 12v vr6 and now having some problems. Mainly having issues with start up. Having to feather the gas to get it to start and still runs rough for a min or two.
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2004 PD TDI. been a little hard to start these days, hot or cold, and suddenly dies on me in middle of the road. Tank pump is working, new fuel filter so lots of fuel. Replaced engine speed sensor as there was no tach function. Glow plug light comes on, so ECU has power. Not a hiccup. Don't have the advanced VW diagnostic software, just generic scan tool. No engine codes.
I checked the wiring diagram in my manual and it shows 3 wires to speed sensor, one of which should be ground. getting various resistances across all 3 to ground (measuring through the ecu end of the connector, sensor unplugged), but no direct to ground which seems strange, but I'm not sure I trust the Haynes manual as the colour codes listed aren't the same as in my car - I've got white brown and black, and none show direct ground. Not sure if it matters as it's only a shield anyway.
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So the car is a 1999 golf gti with a 2.0 AEG with a 5 speed manual. My brothers car. He has been telling me its been hard starting in the mornings for a couple months, sometimes it dies, sometimes it idles at 500 or lower, he has to rev it up to 1500 to get it to warm up then in kinda stays normal till he cold starts the car again, then does it all over. So he was driving down to my house to leave it with me to look at and on the way over he heres a big bang. has the car towed over here.
Cyl #3 has backed itself out and clearly a serious misfire, threads look fine so I put all new plugs in oem ngk three prong, runs ok still too low 400/600 stalling a couple times. this morning i installed new wires (Bosch)and a coil (aftermarket) and it barely wants to run now, stalled instantly. So I put the old coil back in and it stays running but watching the motor, its clearly misfiring. No codes as of yet and i have no access to vagcom. I've checked the firing order and wire placement on coil like 8 times to make sure it is correct.
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Having trouble with my '00 Jetta 2.0 A/T w/ 98K miles. Had the water pump replaced @ a year ago (for the 2nd time, the 1st replacement died after <15K miles.) The car has had issues with rough idle when started, especially with a cold engine, since before the 2nd water pump. I've replaced the coil pack, thermostat, and coolant temperature sensor in the recent past in addition to the water pump & timing belt.
The gas mileage sucks, and when it's idling rough it doesn't "idle up", & will stall if the gas pedal is pressed with 30 secs. of starting. Otherwise it seems to run fine. The coolant temp. sensor was replaced after a CEL indicating it was bad. The CEL went off after it was replaced, but it's now throwing a P1296 Cooling System Malfunction. I have noticed the temperature gauge fluctuates instead of staying around the "middle" since the 2nd water pump replacement, and will run "colder" in colder weather. Since spring is here, the temp. gauge stays around "normal", or the middle.
Some research online says thermostat OR coolant temperature sensor. Since the gauge registers normal now, I'm leaning towards a bad temp. sensor...?
Does the hard start/rough idle and the cooling system malfunction CEL could be related?
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So I have a 2005 GTI 1.8t and I just recently had a new fuel filter/fuel pump installed.. Now ever morning when I go to start it it starts really hard.. once it's starts it runs fine it just takes me a couple cranks to get it started....
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I am having a random hard start condition. it will happen once a week or with no rhyme or reason. It turns over real nice but does not start until the second or third trythe last time on third try i push accel pedal to floor and it started. This hasn't happen in a few day so I cant tell you if the accel pedal will always work.
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I recenty replaced the upper intake manifold gasket on my gmc sierra 1500 350 motor. In the process I did plugs and wires and power steering pump. I went through everything and cleaned it to perfection and put it together. It started like a dream and took it for a test burn out in the country. About 15 miles down the road I shut it down and went through all the fluids and upon starting I noticed it was really hard starting. Kinda like it had alot of compression. I just replaced the battery 2 month ago with the best Interstate battery they had and it still checks out good.
Every time I went to start it cold it started normal but when warm it had the same hard starting issue. Well a week later I stopped at the store before work and it did the same but then just rested to a stop and now the starter just clicks every time I turn the key. I can turn the motor over by hand with a wrench and all battery connection are good. I just put a new starter in today thinking that may have been a fluke of a deal but nothing still. I did see when I first tried the new starter that the pulley on the alternator was trying to spin over ever so slowly tell it quit again.
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I am having a problems with my intrigue... Hard to start when warm i checked the pressure reg vac hose found no fuel so im not sure if that is the problem. I have the 3800S11 engine. sometimes it will start when warm other times i need to push the gas a little to get it to start.
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My Camry has 185,809 miles on the 4 cylinder, it has recently started to be hard to start when it's at operating temperature, has code P0301 and p0302 replaced spark plugs at 185,000 miles no change, possibly ignition coils?
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I have a 2010 Toyota Camry LE V4 version, it has about 47k miles on it and about 4.5 yrs old. I have developed a problem over the past few months where the car will crank fine in the morning or when cold (sitting around for several hours or overnight) However if the car is Warm when driven for about 10 miles or more, then parked and then started again in 15-20 minutes it will feel hesitant to start, seems like it takes several cranks before starting and literally feels like it will die while cranking but it will eventually start.
i have the original stock battery, i got it checked at O'Reilly and they confirmed that battery, stater, alternator looked good and cold cranking amps looked good and other items checked out as well fine.
I am not sure what the issue might be at this time, However since the problem is at random and only when outside is like a 100F (which it is not now) and it is warm/hot (driven after 10+ miles), i am not sure what is wrong with the car. I have been using Top Tier gas for the most part, however i had used Arco for about 3-4 months during the Spring/Summer of 2013.
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This has been going on for 3 or 4 months can someone tell me where the ETC sensor is located on 4 cylinder 2008 Elantra ?
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1991 honda crx si - starts fine when weather and engine is cold but lately giving me trouble starting when it is warm [above 80] and engine is cold [has not been driven for several hours].
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