Hi I have a 90 cavalier Z24 that the check engine light
keeps coming on. It throws one code which is 33. I was told that
it was the egr valve so I replaced it . The thing is electronic and
pretty expensive. Also I tuned it up new plugs ,wires, coil pack
pcv valve,all the filters and a oil change. The car runs great
but again the check engine soon light came back on and again
a 33 code. In PA the car will not pass emissions with the check
engine light on. The car has a 3.1 engine and 165000 miles.
Any help would be appreciated.
Yes I did ,I disconnected the flexible hose that goes to the exhaust pipe to
see if it was clogged it had some carbon
inside but not much. I also checked the intake where the
valve mounts to the engine again it some carbon buildup
so I used a coat hanger and rag to clean it out. I used new
gaskets when I put it back together plus some dielectric
grease on the connector.
It has me completely stumped so for now I put some black
tire tape over the check engine light to stop me from going
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