Quote:
Originally Posted by Frank Reiner
Ec:
Check for fuel flow at the return line fitting of the fuel distributor. In the event that the pressure regulator (FPR) has become stuck from sitting, there will be minimal or no flow from the return. If there is no return the internal pressure against the metering piston will be too high.
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Ec:
In addition to the possibility of the FPR being stuck, the return line from the engine to tank may also be clogged.
Quote:
Originally Posted by Eurocoach
Well, like I said. I'm no expert on these old mechanical injection systems but I think I figured it out. The clue in was when I was trying to do a fuel pressure test. The pressures kept building back up after relieving it. The fuel distributor must be bad. I have fuel coming from both ports going to and coming from the warm up regulator. The port on the rear left and from the top. That can't be right.
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Ec:
Symptoms of a stuck FPR, or clogged return line.
Remove the cap nut of the FPR (on the FD), pull the regulator pieces out of the FD, clean the parts, replace the o-rings, and blow out the return line.