help with my jeep

DetroitBuilt · January 11, 2011, 01:21:02 AM

i have a 1998 jeep wrangler. it was in idle and suddenly died. it will turn over but the fuel pump will not run. i replaced the pump, all of the relays and the crankshaft positioning sensor. the new pump still will not run. it is not showing any codes. any suggestions will be great thanks.

BIG DOG · January 11, 2011, 01:29:16 AM

oh

hmm is there a fuseable link somewhere yrs ago the chevys had them in a few spots any juice at the relay test with alight tester ? how long will it run off a squirt bottle

buddman (AKA Mick) · January 11, 2011, 02:42:05 AM

We got a program at work that really helps with troubleshooting things like this, I can take a look tomorrow, this has the 6 cylinder right?

whskytango · January 11, 2011, 02:54:55 AM

yeah hes got the 4.0

MR NASTY · January 11, 2011, 03:08:36 AM

Possibly the key switch itself is bad. Had it happen to a car I had once

whskytango · January 11, 2011, 03:19:03 AM

Quote from: MR NASTY on January 11, 2011, 03:08:36 AM
Possibly the key switch itself is bad. Had it happen to a car I had once

it will start up with starting fluid shot into the throttle body tho

MR NASTY · January 11, 2011, 01:49:12 PM

Mine did too but for some reason it wouldn't turn on the fuel system. Not saying it is just a thought

whskytango · January 11, 2011, 01:52:38 PM

Quote from: MR NASTY on January 11, 2011, 01:49:12 PM
Mine did too but for some reason it wouldn't turn on the fuel system. Not saying it is just a thought

thats weird, guess its something to look at, lol cause at this point its going to be something thats least expected

MR NASTY · January 11, 2011, 02:00:25 PM

Take a jumper wire and try to power the f pump to eliminate you getting a bad pump. Or a tester to see if there is any power back there.

Cannaert · January 11, 2011, 02:22:17 PM

Quote from: MR NASTY on January 11, 2011, 02:00:25 PM
Take a jumper wire and try to power the f pump to eliminate you getting a bad pump. Or a tester to see if there is any power back there.

What he said. HA. Try using a jumper wire to see if its in the harness. If it is in the harness then you can rewire it or find the bad spot in the harness.

Or it could be the old pump die and when you put the new on in a wire came loose and is no long connected to the pump.

buddman (AKA Mick) · January 11, 2011, 05:11:38 PM

Sent you a PM, let me know if it helps

MR NASTY · January 13, 2011, 01:29:30 AM

any luck? Curious to see what you find out.

old school truck dude · January 26, 2011, 11:04:45 PM

It could also be the oil pressure switch. If its leakin its probably bad. The oil pressure switch could be unplugged or wires goin to it broke, shorted, melted, etc. You must have oil pressure for the fuel pump to run, its a safety feature. The wires goin to the fuel pump run through the oil pressure switch on some, and others the computer handles all that. Lotta folks forget about that one and end up at a shop payin all kinds of $$

DetroitBuilt · March 19, 2011, 10:44:32 PM

i found the problem. a wire got pinched above the rear axle. all i would of had to do is splice the wire and i would have been back on the road. thanks for the help guys.