HELP!!! Hot start problems
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Joined: Jul 2000
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HELP!!! Hot start problems
There's something wrong with my 5KS. It starts fine when it's cold but once the engine is a little warm, it refuses to start. It kicks but it doesn't seem to ignite. I have to turn the key many times and after a few minutes, when it does start, it runs nice and smooth, like nothing was wrong so I don't know if it has anything to do with the ISV.
It's scary because now I'm afraid to stop the engine at a gas station. Help. It's embarrassing too!
It's scary because now I'm afraid to stop the engine at a gas station. Help. It's embarrassing too!
AudiWorld Super User
Joined: Apr 2000
Posts: 7,274
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Heres some common...
problems that could lead to "hot" start problems:
ISV defective(clean with carb cleaner)
bad fuel pump(is it noisey...unlikely the problem)
control plunger sticking in air distributor
fuel leak/lack of pressure(usual suspect)
bad fuel injectors(usual suspect)
idle speed off/idle switch defective(maybe?)
differential pressure regulator(probably not)
leak at air intake(maybe?)
airflow plate mispositioned(another maybe)
thats all I can think of right now...it's late!
most likely you have injectors that are leaking down/bad fuel pressure due to leaks or the airflow sensor plate is sticking...most of the other "problems" listed would effect cold starts and/or performance...but you have stated that it runs fine after cold starts and when it gets "going" hope this help a little...good luck.
Steve Ankney
88 5k 80k
Holland, Mi
ISV defective(clean with carb cleaner)
bad fuel pump(is it noisey...unlikely the problem)
control plunger sticking in air distributor
fuel leak/lack of pressure(usual suspect)
bad fuel injectors(usual suspect)
idle speed off/idle switch defective(maybe?)
differential pressure regulator(probably not)
leak at air intake(maybe?)
airflow plate mispositioned(another maybe)
thats all I can think of right now...it's late!
most likely you have injectors that are leaking down/bad fuel pressure due to leaks or the airflow sensor plate is sticking...most of the other "problems" listed would effect cold starts and/or performance...but you have stated that it runs fine after cold starts and when it gets "going" hope this help a little...good luck.
Steve Ankney
88 5k 80k
Holland, Mi
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