Car runs poorly after being left to cool for 20 minutes

jackocooper
Tue, 17 Apr 2018 08:38:49 +0000
Maintenance/Repairs

I’ve recently restored a 1988 Alfa Romeo 75 3.0 V6. Previous work done in this thread:

Alfa 75 3.0 V6 Bogging on Acceleration & Slow to Start Maintenance/Repairs

My 1988 Alfa 75 3.0 V6 seems to be bogging under acceleration. After reaching operating temperature, it can run fine for a few minutes (plenty of power), but then it frequently has a few bad minutes where it has no power, jerks and hesitates with acceleration and sometimes backfires with a pop. It seems to run poorly after a few minutes of driving. The car hasn’t been run properly in about 7 years. I had an issue with the fuel injector o-rings leaking air causing a misfire. I’ve since replaced …

The car starts and runs perfectly now, however the only issue comes when the car has been turned off for about 10/20 minutes after a drive. When starting back up the idle is rough and it stalls so the accelerator must be pressed to keep it going. It usually gets running back to normal after a few minutes.

Any ideas?

13 posts - 6 participants