Big PCM problems after header install....
02-22-2005, 01:27 PM
#2
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Well I know leaks will cause the O2s to read lean and dump lotsa fuel in, unnecessarily at that. square up your leaks first, as far as the codes go, you're still on stock cam? I dunno why the 0300 code threw, but the other O2 codes are common after header installs. If you have access to any scanning/logging tools, check out your O2 signals and fuel trims. If you have a shot O2 or two, that would make your car run like crap too. When you removed the EGR did you have your PCM settings changed to support it as well? Just a few places to start...
02-22-2005, 02:11 PM
#3
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check the engine sensor fuse
Sounds like a wire for one of your front O2s melted and is hitting the header... this will cause the engine sensor fuse to blow and cause you to run speed density (which will cause it to run for **** if it's not tuned that way)
If there's an exhaust leak at the gasket that can cause problems too ... it can suck in oxygen and cause incorrect O2 readings making the car think you're running lean so it'll add tons of fuel
Sounds like a wire for one of your front O2s melted and is hitting the header... this will cause the engine sensor fuse to blow and cause you to run speed density (which will cause it to run for **** if it's not tuned that way)
If there's an exhaust leak at the gasket that can cause problems too ... it can suck in oxygen and cause incorrect O2 readings making the car think you're running lean so it'll add tons of fuel
02-22-2005, 03:54 PM
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Originally Posted by horist
check the engine sensor fuse
Sounds like a wire for one of your front O2s melted and is hitting the header... this will cause the engine sensor fuse to blow and cause you to run speed density (which will cause it to run for **** if it's not tuned that way)
If there's an exhaust leak at the gasket that can cause problems too ... it can suck in oxygen and cause incorrect O2 readings making the car think you're running lean so it'll add tons of fuel
Sounds like a wire for one of your front O2s melted and is hitting the header... this will cause the engine sensor fuse to blow and cause you to run speed density (which will cause it to run for **** if it's not tuned that way)
If there's an exhaust leak at the gasket that can cause problems too ... it can suck in oxygen and cause incorrect O2 readings making the car think you're running lean so it'll add tons of fuel
