Losing power at upper rpms
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Join Date: 11-14-14
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Losing power at upper rpms
Hey guys, I just recently put in a zzp mid length header and downpipe in my car (06 sc). When I went out to test drive it I noticed that its lacking power at upper rpms (around 5500 to redline). It kinda feels like I'm hitting a fuel cutoff cause the engine feels like its stuttering. Boost goes up to about 13 psi bit then starts dipping to around 10.5. Does anyone have a clue what this is? I'm guessing my oxygen sensor may have got messed up while installing. Also, whine the engine is running I have no check engine light, but when I shut the engine off and leave the ignition on, the check engine light stays on.
My wife has my obdII scanner in her car, once she gets back from work I'll scan the cobalt
My wife has my obdII scanner in her car, once she gets back from work I'll scan the cobalt
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