NO START, FUEL DELIVERY ISSUE

1993 Jeep Grand Cherokee

Tiny

jaredr

July, 7, 2011 AT 7:36 PM

93 gc w/4.0 a/t 4wd.
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?

Thanks jared

FOUND 51579 RELATED QUESTIONS

5 Answers

Tiny

BMRFIXIT

July, 8, 2011 AT 12:10 AM

Check Fuel pump relay wiring and relay box wiring
check red wire for battery volts
dr grn wire for ignition switch power
Also check ballast resister on side inner fender with dark grn -tan wires

Tiny

jaredr

July, 8, 2011 AT 12:49 AM

Checkd power under pdc with relay installed, no power from orange/black wire to f/p. Checked spark after that, none.
Going to check ignition power next, thanks.

Tiny

jaredr

July, 8, 2011 AT 12:50 AM

Dont see a ballast resistor anywhere, not to sure they would use that on this model.

Tiny

jaredr

July, 8, 2011 AT 12:58 AM

Power present in ltblue/ red ignition wire key on not when off

Tiny

BMRFIXIT

July, 16, 2011 AT 5:06 PM

Wiring harness

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