1993 Jeep Grand Cherokee Repair Question
No start, fuel delivery issue
died out while siting at idle after replacing f/p 2 mo. prior.
ordered new pump and installed, no start. replaced pump due to running for a breif few seconds and then not at all.
got another pump!@#W$$^#%, plugged into connector and ran for a few seconds, same result. Tested for power at f/p connector, none present except for level sender. Ohmed crank sensor, excessive, replaced, still no power, rechecked new sensor, no resistance. 8 volts to sensor. Swapped relays around. nada. Jumpered fuel pump at relay, wal la!! power at fuel pump builds 42psi, No Start. still unable to get power w/o jumper, Cycled door switch to deactivate security even though no security light flashing......no CEL comes on cluster.????????
Sounds like there's a problem with the computer controlled of the fuel pump relay circuit-
68 questions asked
So what you found proves the fuel pump is working correctly. It should run for one second after turning on the ignition switch. Did you stop there or did you check for spark during cranking?
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