Quote:
Originally Posted by GuywithL86
ok so you have reduced power but are not setting any codes, there are not many things that would not set off the CEL.
I'm thinking it's some sort of blockage in the exhaust or intake.
Do you have NPP? maybe the NPP valves aren't opening up? I suppose you could hear that though.
Maybe try disconnecting your exhaust as close to the headers as possible and try a pull to eliminate a blockage? For all you know someone shoved something in your exhaust.
Also maybe try disconnecting your air filter, who knows maybe some idiot sprayed it with something they shouldn't have.
Maybe your cats are clogged?
Also you should be able to tell if your intake path is blocked somehow by a WOT vacuum reading. Sometimes intakes are tested that way. Less vacuum = more flow.
Torque app with bluetooth dongle would be helpful. You can read all the sensors. Could be something as simple as a fuel filter, but I'd think you'd get codes if that were the case.
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I think if the tune is bad, it would also not throw a code, because after all, it would be doing what the bad tune is telling it to do.