Exhaust firing/spluttering when throttle is applied
Info regarding the car:
Stock internals
Stage 3 Horsham chip
GT2860RS
444cc injectors
Z32 AFM
Walbro 255 fuel pump
3 inch exhaust & apexi air filter
FMIC
Plugs are BCPR7ES gapped to 0.8mm
Timing is set to 15 degrees
I've been having this issue since I changed my AAC, back to the one that came with my car.. Tested another one since I was having troubles with idling.
So a basic explanation of the problem: whenever I apply throttle, the exhaust goes bang. It happens 99% of the time when I let go of the throttle, and then start to accelerate again..
Since the AAC was the only thing I changed before this started to happen, I of course suspect that it is the culprit. However, the engine is idling perfectly @ 850 (+-50), which it didn't do before.
Another thing that happens, more randomly, is that the engine sometimes just dies, when I have to stop quickly. RPM just goes from 3k to 0. After reading a bit about that problem, it seems like the AAC valve is the cause of that issue (?).
Any good ideas? The car is absolutely perfect to drive, except for that damn banging whenever I apply throttle... :annoyed:
Johan