i have the same problem only i get 2 codes 76, 77 for solenoid 2
and 3,, and code 13 for the o2 sensor,, i replace the EGR and both
o2 senosrs,, even put a new cat on,, 10 miles after the codes are
cleared it pops up 13,76,77.. have a snap on scanner,, and seems
to show o2 sensors working and all three solenoids,, but still
comes up with those 3 codes.. anyone know what will fix this?
1994 chevy camaro 3.4 v6 200,000 mile
> 94 camaro
> Digital EGR valve
> 3.4 SFI
> Service engine light comes on going down the highway when I
> let off
> the gas. 3 codes for all three EGR solenoids.
> I have pulled the EGR valve off cleaned and tested it with 12
> all three solenoids work. Removed the EGR tube and cleaned it,
> replaced it with new gaskets, made sure hole to the valve is
> Sprayed the tube with WD40 while the engine was running, no
> change in
> the idle (no leaks). With the key on and a wire from the 12 V
> on the
> EGR harness and shorting each solenoid to ground works fine.
> With the
> engine running and shorting each solenoid there is no
> difference in
> the idle of the engine.
> Could there be a blockage in the exhaust manifold?
> Could there be a blockage in the intake manifold or a sensor
> detects whether the EGR opened or not?
> Car runs fine, just tired of seeing the service engine light
> I know how too disconnect the service engine light, but thats
> taking the battery out of the smoke detector.
> Any leads on what else to check, would be much appreciated.
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