How about the fuel filter? Don't take any lines loose without being sure there is no pressure on the system. Check the pressure spec first, before worrying about the pump.
You could do a cylinder balance test, engine running, kill cylinders, one at a time, pay attention to the rpm drop when cylinder is killed. If no rpm drop with cylinder that you killed, that cylinder is dead. Could be fuel--spark--compression. For testing, if you kill spark at the cylinder, be quick, so you don't flood anything.
Monday, January 17th, 2011 AT 7:28 PM