1996 chevy truck. 305, 5.0, 155k miles. Random misfire, but heavy on cylinder 7. I have replaced coil, plugs, wires, spider injection system, crank positioning sensor. The SES light will flash when idling, but will not even come on when driving, or if I keep the RPM's up by powerbraking it at stop lights. I have had it to 3 mechanics and they all want to rebuild the engine. Could it be a fuel problem? Fuel pressure regulator, fuel pump, bad line/hose? There does not seem to be any vacuum leaks.
Hopefully you can help. I have been messing with this on and off for over a year.
Thursday, August 4th, 2011 AT 3:44 PM