Re: intermittent problem will not start /fuel pump system...
If you run it under a quater tank you will continue to replace them the fuel keeps them cool and lubricated i know it sounds weird but its true ive bought 2 in as many years at600 a pop keep it @ a 1/4 to 1/2 and you shouldnt have to replace it again after this time
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Can you hear the pump hum or buzz when you turn the key to on? It should come on for a couple of seconds to pressurize the fuel system. If you don't hear it, check the fuel pump fuse. If fuse is good, find the fuel pump relay under the hood. Hold a finger lightly on the relay and have someone turn the key to on. You should feel it click on to power the fuel pump. If no click from the relay, you will have to diagnose the fuel pump circuit. The relay should have power from a fuse link or a maxi-fuse that may be out. The computer signals the relay to turn it on. Now if you do hear the pump, you would want next to check the ignition circuit: check for spark on one or two of the spark plug wires. The ignition is probably good if you see a blue snapping spark. If weak, intermittent, or orange colored spark, the ignition circuit would need diagnosing.
look under the hood on the right side where your brake fluid is..There is a black box to the farest right of the brake fluid. take off the lid to this box were you will find fuses..Reach in and feel the fuses to see if any are loose.The largest fuses in the front, push down on those and then try to start it up..Take them out look at them make sure there ok if this dont work..they the one bad might need to be replaced..
: Sounds like you have
attacked the problem pretty well. Check the fuses. Do a
"pin" check for power and ground to the ECM. When you
replaced the ECM, did you use a new prom? If not, you
could have a faulty prom. Check fuel pressure and using
a Noid light check the pulse at the injectors. For your
information, the injectors will have 12-volts and the
computer momentarily grounds them to open the injector.
Your problems may be caused
by a faulty ignition switch or starter solenoid. Intermittent electrical
problems are difficult to trace. We would suggest first
checking the ignition switch and next the neutral safety
switch You are close to the right
track but check the fuel pressure during the no start
condition as you may have a faulty fuel pump. You also
could have a vehicle speed sensor problem
I have the same problem, I replaced the fuel pump. Did NOT solve it. i was told that it is a computer problem. The computer is not sending electric to the fuel pump, by cranking it several times the oil pressure builds up and will over ride the computer and send power to the fuel pump. This is a common problem on these asrto vans.