Quote:
Originally Posted by craftysince86
Hey everyone,
i'm having some issues with my 4.5, after i have been driving the car for a some what extended period of time 30-45 minutes+ the car will shut off as soon as it hits idle.
the motor can heat up fine in the first 20 minutes (according to the temp gauge) or so and i will have no issues. after the extended period of time she's still not in the red zone but just starts shutting at red lights. all the traits are very similar to vapor lock on warm start issue, but i have never had this happen while driving.
weird thing is, if i put it in neutral at the light she won't shut off. as soon as i put it back in drive if i don't give it gas she shuts right off.
any thoughts?
thanks
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You could try increasing the idle rpm. When cold, this should be as high as about 1200rpm and then gradually decrease. Try to keep it at at least 600rpm when fully warmed up.
Sometimes the AAV needs attention. If it does not move smoothly, you can have it stick and then when car gets fully warm, it lets go and closes causing rpm to drop. This makes idle adjustment difficult.
You could try cleaning AAV by soaking in Carb cleaner and then perhaps something like Simple Green. Ultrasonic bath would help, if you have access to one. You can take the AAV apart, but that would be a last resort. New ones cost an arm & a leg. But perhaps getting a used spare and trying freeing it up might be worth while.
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Graham
85 300D
,72 350SL, 98 E320, Outback 2.5