1995 Chevrolet Blazer Repair Question
Mileage: 160,000 miles.
If either the upper or lower intake gasket were leaking on a 1995 s-10 blazer would it cause it to run rich? It is a 4.3 motor
Hopefully you can help me.
Asked by sjbambrgr8Answer
spider injection? maybe some poppets are sticking.
when I pull all the spark plugs they are all showing rich condition. It would be pretty coincidental for all the poppets to go bad at the same time I replace the long block wouldn't it? They were all fine with the old motor.
Also, I pulled the EGR valve in there was nothing blocking it. It has a gasket with a screen on it and the screen was clean. I pulled the map sensor and cleaned it for good measure although like I said the old motor ran fine with all these same components.
maybe you missed a ground wire somewhere? but funny thing is, i got an old cheby 2.8 MPFI that i put new intake gaskets on and it's doing the same thing. running way too rich. havnt had time to dic wit it cause it's a 4th car.
No missed ground wires. They have a bold on the back of each head that is grounded and one at the base of the block by the crank that is a ground wire. This is the 4th motor I have replaced in a blazer and this is the first time I have had this issue. This is also the first time I have reused gaskets.
iv'e re-used gaskets from time to time but i always coat them with copper gasket sealer spray coating.