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International Automotive Technicians Network
Re: Firebird P0401
Posted to Technical Discussion Forum on 7/14/2018

So now we can throw Delphi under the bus, right?

Well I don't know.

"I also cleaned the throttle body, IAC, MAF, & replaced the PCV & MAP. During testing I ran the engine on MAF sensor only- trims improved some, while on MAP only trims went more negative. ... Login to read more.