So I was chilling with a good friend checking out his black MSP, and his car is running funny, maybe you guys can help me out.
mspS by korbancorbett, on Flickr
His car runs fine out of boost but as soon as you start to hit boost ( about half throttle and more than 3-4 psi of boost) it starts to shudder, almost like a mis-fire.(still hits full psi 5-6.5 psi) the problem only exist under boost or wide open throttle. The ignition system has been checked ( new wires/coils/plugs) o2 sensor replaced/Maf checked. my question is, when our cars hit boost does the ECU change timing?
I'm thinking maybe his timing is off, but not sure.
what do you guys think
oh and only mods are a FMIC w/ relocated MAF and bov
I kind of had the same problem with mine, and it was because I had a small boost leak and a bad wastegate actuator. But that's the extent of my knowledge. lol.
Edit: If you ever sell your MSP, I want it. hahahaha.