Laredo, 4.0 auto, Problem with not starting. NO fuel at the rail. Had fuel pump replaced. Car starts now intermittently. When it doesn't start, there isn't any fuel at the rail. on't think pump was the problem though.
Bypassed the fuel relay and pump runs. Changed fuel filter. Thought that was problem Ran a couple of times, then stopped.
Changed the Crank Positioning sensor. Car started immediately, then quit again after several runs.
Every time it stops, there isn't fuel at the rail.
Thought it might be the ECM, tried another from the junk yard, (from a friend) and it still didn't start. Not sure of exact replacement because it has been replaced before. I think some will work and some will not. Is this correct?
Will check for spark again tomorrow as it is not running or even trying to start now.
Any ideas? I am going nuts.