Hi guys,
I have this problem for a while now..
It started when me and a friend changed the TMIC setup for a FMIC setup. That did not fit due to some installation problems, and I installed the old completely original TMIC setup.
Since then, the car idles around 1250 rpm where it did around 900 rpm before.
Things I have tried to find the problem:
I checked for vac leaks. (I used brake cleaner to spray on the engine bay and parts to look if the sound of the engine changed. I also de-installed and put back the tmic setup and looked at cracks in the rubber and clamps. I also looked at the other small hoses, but could not find anything that had cracks in it or did not seal properly.
Cold start the engine does 1750 rpm. Then it slowly after a while drops to 1500, 1250 where it stays. Even when the engine temp gets half way as it allways does, the idle does not drop. When I touch the pedal it rises and sometimes drops a tiny bit under 1250.
But it also happened, when I turned the engine off and started it back on, it suddenly did 1050 rpm! Very strange..
When I took it after a small drive, and let it stop again to stand still it did not went back to 1050 rpm..
I also removed the EFI fuse to erase any form of fault codes or whatever, this did not make any form of difference.
What could be causing this? I personally don't think it's the vac leak, I checked it and it boosts fine, boost doesn't come on later or anything like that..
Could it be the coolant sensor? Or any other sensor? Or do I need to clean the TPS and stuff?
Any help would be appreciated
Thanks,
Marco
I have this problem for a while now..
It started when me and a friend changed the TMIC setup for a FMIC setup. That did not fit due to some installation problems, and I installed the old completely original TMIC setup.
Since then, the car idles around 1250 rpm where it did around 900 rpm before.
Things I have tried to find the problem:
I checked for vac leaks. (I used brake cleaner to spray on the engine bay and parts to look if the sound of the engine changed. I also de-installed and put back the tmic setup and looked at cracks in the rubber and clamps. I also looked at the other small hoses, but could not find anything that had cracks in it or did not seal properly.
Cold start the engine does 1750 rpm. Then it slowly after a while drops to 1500, 1250 where it stays. Even when the engine temp gets half way as it allways does, the idle does not drop. When I touch the pedal it rises and sometimes drops a tiny bit under 1250.
But it also happened, when I turned the engine off and started it back on, it suddenly did 1050 rpm! Very strange..
When I took it after a small drive, and let it stop again to stand still it did not went back to 1050 rpm..
I also removed the EFI fuse to erase any form of fault codes or whatever, this did not make any form of difference.
What could be causing this? I personally don't think it's the vac leak, I checked it and it boosts fine, boost doesn't come on later or anything like that..
Could it be the coolant sensor? Or any other sensor? Or do I need to clean the TPS and stuff?
Any help would be appreciated
Thanks,
Marco