Hey guys, I've recently been dealing with a host of issues on my car and am trying to get everything sorted out. The last (hopefully not still current) problem was the ECU limiting boost to wastegate pressure only (7-8 psi) for reasons unknown. Before that happened, power delivery would be rough with an occasional backfire around 4k rpm.
I've changed spark plugs, cleaned the MAF, checked vacuum hoses, put in a new air filter, etc and it seems smoother so far.
Problem is that I'm not sure what's up with my boost. I get around 14psi according to my gauge, but around 5-6k rpm, it sometimes drops down to about 10psi. I don't think this is normal...also - what boost levels should I be getting? Could/is this associated with the wastegate arm adjustment?
2002 wrx - Cobb AP Stage 2 91 octane map, gutted up-pipe, MRT catted TBE.
Any help is appreciated. Thanks guys