Hey guys, I have a rather weird boosting issue with my car.
Car would run/boost fine, then all of a sudden it would run weird and won't boost past 6psi. I shut the engine off for about 5 seconds, fire it up, runs fine, then after a while (5-30 minutes, no certain interval i.e. random), same weird issue.
During this 'boosting problem' mode, as soon as the car goes above 0psi, it will surge and run rich. On overruns/shifting, it will dump fuel (exhaust makes cool popping noises).
Shut engine off for 5 seconds > fire it up > runs fine.
Sometimes it will run fine for over an hour. Sometimes it will happen after 5 minutes.
This issue occurs when the car is warm.
Perhaps AFM(s) is playing up, unable to afford a new pair of them unfortunately. Still doesn't explain why it won't boost past 6psi (or 350mmHg or 'halfway between 0 and 7' according to standard boost gauge).
Any ideas/experience?