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Re: Trouble codes
My guess would be the EGR isn't coming on, or not coming on enough. Pull the valve off and check the passage. It should be mostly clear, but of course it will have light carbon on the walls. Don't use solvents to clean it, as you will damage the diaphragm. Use a pick or a small screwdriver to clear it out if it is plugged.
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'04 Cavalier coupe M/T 2.2 Ecotec
Supercharged 14 PSI boost, charge air cooler, 42# injectors
Tuned with HP Tuners
Poly engine/trans/control arm bushings
Self built and self programmed progressive methanol injection system
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