It is possible at this point, that it is not a fuel problem. Was it the same before you did any work? Checking the mechanical fuel pump for external leakage is just part of the diagnosis, it doesn't tell you if you have adequate fuel pressure, which I would think is only 3-5 psi. If it is filling the float bowl, you should not have any initial acceleration problems. Has the ignition timing and spark output been checked? If you have low spark output, you could have these symptoms. Also if you have a base timing concern, or little or no advance occurring, you could also have the symptoms. If when you check the timing, and the mark is floating around, it could indicate a worn distributor gear, worn distributor, or worn timing chain and gears. Another possibility, if it has one, is the catalytic converter becoming restricted. If it is not letting full exhaust through the engine, you will not have full intake into the engine.
Wednesday, August 17th, 2011 AT 4:26 AM