Quote:
Originally Posted by mgarblik
To take the above to the next step. If it holds pressure, the fuel system has integrity. (regulator, injectors and fuel pump are good). If the pressure drops to near zero, you have an issue. You can use shutoff valves in the feed and return lines to isolate. Shut off return valve to the tank. If pressure still drops, leaking injector, (s) . Much more common issue is failing crank sensor. They fail in an intermittent mode all the time. Do a quick check for ignition, next time it won't start. Also, next time it won't start, hold the pedal WOT and see if it starts. That would indicate a leaking injector as well. 3800's are pretty easy to deal with for the most part. Take care.
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I've had one before with a bad crank sensor. This one acts a little differently than my other one did. My other would just act like the ignition is turned off when cranking. This one acts like it's trying to fire but won't.
The fuel pressure with it running was at 45 psi. I think they are supposed to be 45-50??