Engine runs very ruff with white unburned fuel smoke coming out the exhaust, also fuel will leak out between the exhaust manifold and tailpipe connection after running for a little bit. I have ran compression test with 180 -185 each cylinder. The fuel pressure relay was changed before I got it. I changed the injectors because when the key is on the #3 cylinder will start filling with fuel like the injector was stuck open, (that did not fix the problem.) I have also put a new ECM Computer on it. The problem seems more with #3 & #1 Cylinders fouling out due to excess fuel. I have checked the wiring harness that goes along the fuel rail to the injectors and other sensors for shorts and it was ok. #2 & #4 cylinders working fine.
Also took to local Chevy Dealer they put on computer did not show any codes before starting - after starting showed a code for rich fuel. ANY Help would be appreciated
have the same problem?
Saturday, November 14th, 2015 AT 5:51 PM