My Dad just came into town with his 94 buick Lesabre 3.8L Automatic with 140,000km It has a real bad hesitation from stop under heavy accelleration. On the highway it gets up to speed and feels smooth but accellerates slow too. When you hammer it to full throttle on highway it does not kick down and go it just feels sluggish or like there is no power. Engine light has come on in the past and goes out. The scanner showed no current codes but old codes were: Heated 02 sensor voltage low, fuel lean and TCC error. My Dad pulled the fuse out for the ABS because it was not working properly. Fuel Press is 42psi key on eng off. It drops about 6-8psi when started. When you rev it up engine bogs down and press increases. I checked resistance in coils and they all apear to be the same 6.2 (not sure scale used). Wires are hooked up right and spark plug gap is.060in. Vaccume teed into fuel regulator reads 20hg at idle and 0 at full throttle. Coolant temp sensor seems to be ok. (Guage works and resistance varies when tested with multimeter. New parts put on were o2 sensor, IAC motor, fuel filter, Intake manifold gaskets, throttle body gasket, spark plugs and wires, we pulled off EGR and it looked clean. I sprayed wd40 at all gasket areas to search for vaccume leak but no change in idle.
Wednesday, July 11th, 2007 AT 1:30 AM