Got a 03 Tahoe w/4.8L, running a little rough misses upon warm up not real bad just a slight miss. Pulled a spark plug on the left bank and it was carbon fouled, so I pulled the rest of the plugs. All the plugs on the left bank are carbon fouled (rich) but all the plugs are normal on the right bank. Fuel pressure regulator doesn't control the amount of fuel in relation to the left or right bank, it controls the overall fuel pressure, correct? Now this is a Vortec engine could the piping in the manifold be damaged on one side and not the other? What I mean by piping is the spider legs that com off the injector or are there 2 injectors one for each side? I think I may have just answered my own question.
have the same problem?
Wednesday, September 18th, 2013 AT 1:26 PM