Engine Performance problem
2000 Chevy Silverado V8 Four Wheel Drive Automatic 160000 miles
My 2000 Silverado 1500, 4x4, 5.3 L, has an engine miss. It miss fires upon acceleration. The " check engine soon" light is on at all times. When the engine is cold it starts easily, when it's hot it starts hard. I have replaced plugs and wires and put in a new air filter. I have checked the PCV valve and it was fine. Upon inspection of vacuum lines, I noticed gas coming from the vacuum port on the fuel regulator. When probing the EGR valve, I had an open circuit in the valve position sensor. I don't know if this trips the " check engine soon" light or if this is causing my performance problem. I also have a plug that keeps fouling on the #4 cylinder. I have switched the coils around to check it and it continues to foul. I appreciate any help that you can give me.
Wednesday, June 9th, 2010 AT 10:47 PM