A friend of mine has a 94 Corsica with a 3100.
He failed a smog test with codes 76, 77, and 78. These codes indicate all three solenoids on his digital EGR valve were bad.
I took off the EGR valve to see if it had carbon build up. Instead. the entire passage under the valve, going to the intake was full of goo. It looked like oil and water. I could see this same goo, although less of it, in the tube going to the exhaust manifold.
See picture. I actually took the picture after I had removed alot of the goo. The passages were completely full to start with.
I cleaned it out as best I could, but the goo and the codes keep coming back.
I cannot figure out where this stuff could be coming from.
What could be the problem here?
He failed a smog test with codes 76, 77, and 78. These codes indicate all three solenoids on his digital EGR valve were bad.
I took off the EGR valve to see if it had carbon build up. Instead. the entire passage under the valve, going to the intake was full of goo. It looked like oil and water. I could see this same goo, although less of it, in the tube going to the exhaust manifold.
See picture. I actually took the picture after I had removed alot of the goo. The passages were completely full to start with.
I cleaned it out as best I could, but the goo and the codes keep coming back.
I cannot figure out where this stuff could be coming from.
What could be the problem here?
Comment