504
below the surface
- Joined
- Aug 18, 2013
- Location
- New Orleans
I may have declared complete victory too soon in solving my no start problem.
http://www.turbobricks.com/forums/showthread.php?t=331963
After installing the new ICU, my car starts fine, but it now stalls frequently until it reaches operating temperature. It seems to happen most frequently when slowing down, either by braking or downshifting. Once the car reaches operating temperature, it generally runs fine without stalling.
Does the new ICU need to "learn" the car?
I have at least one undiscovered vacuum leak (hissing in the dash when shutting off) so that may be part of the problem. But it seems that rather than running the RPM down zero and stalling, the engine is somehow just turning itself off. When driving during warmup, it will just shut off as I'm slowing down. By revving, I can keep it on; or I can downshift to 2nd for a rolling start.
I know that a faulty brake booster can cause this problem, however, my brake booster is nearly brand new (installed earlier this year). I suppose it could be a near immediate failure of the new part.
Perhaps I have some other vacuum leak? I know the climate valve may be the culprit. But I am suspecting as more likely some other electrical cause, due to my previous ICU failure.
Idle is relatively steady around 700rpm after warmup, it's not jumping all over the place. I previously had a much worse vacuum leak (totally rotted flame trap) which caused crazy idling but only occasional stalls.
http://www.turbobricks.com/forums/showthread.php?t=331963
After installing the new ICU, my car starts fine, but it now stalls frequently until it reaches operating temperature. It seems to happen most frequently when slowing down, either by braking or downshifting. Once the car reaches operating temperature, it generally runs fine without stalling.
Does the new ICU need to "learn" the car?
I have at least one undiscovered vacuum leak (hissing in the dash when shutting off) so that may be part of the problem. But it seems that rather than running the RPM down zero and stalling, the engine is somehow just turning itself off. When driving during warmup, it will just shut off as I'm slowing down. By revving, I can keep it on; or I can downshift to 2nd for a rolling start.
I know that a faulty brake booster can cause this problem, however, my brake booster is nearly brand new (installed earlier this year). I suppose it could be a near immediate failure of the new part.
Perhaps I have some other vacuum leak? I know the climate valve may be the culprit. But I am suspecting as more likely some other electrical cause, due to my previous ICU failure.
Idle is relatively steady around 700rpm after warmup, it's not jumping all over the place. I previously had a much worse vacuum leak (totally rotted flame trap) which caused crazy idling but only occasional stalls.