I replaced my 4.3 engine a few months ago. The engine I installed is a freshened engine. All new Gaskets, seals, oil pump, timing chain, cleaned and reinstalled all components. Ever since the truck has had a stumbling and loss of power issue. The plugs, wires, cap and rotor have all been replaced. Along with the throttle position sensor and fuel filter. I have checked all the vaccum lines for leaks with no luck. The truck idles ok, a slight rise and fall of rpm but nothing major. The throttle body gasket has been inspected and replaced. The plugs are white and don't show signs of oil or fouling. When sitting at red light the engine seems to load up a little and blows some smoke when pulling out. I figured that is from the new oil pump and old rings. I had the timing set to factory specs. I am getting ready to replace the EGR valve and Air control motor, but i'm tired of spending all this money replacing things that aren't bad. Any idea whats wrong?
have the same problem?
Monday, March 29th, 2010 AT 9:11 AM