Question about 1990 Jeep Wrangler
Its a bad fuel pump relay. replace it with another relay. you can also take or like fog light relay and replace it with that or replace it with something less important like horn relay.
Posted on Dec 02, 2012
Testimonial: "Thank you for your response! It is greatly appreciated!! Today when I went out to start it, it wouldn't start. If I let it sit for a second and let the fuel pump build up pressure, it feels like it wants to start but doesn't. If I prime the carb it starts fine, and continues to run. I think the fuel pump is bad, unless you think this problem can also be caused by a faulty relay."
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Posted on Jan 02, 2017
Between 100-140 thousand miles the fuel pumps go out on the 1993 cherokee. Its a fact. All parts are manufactured with the knowledge that it will last for a specific period of time then it dies. The relay switch was helpful for a brief while because there was still some juice in that pump, but now that it is gone it is gone.
If you don't see the fuse box under the dash in the driver leg area or beneath the radio check for a covered box under the hood. There should be a fuse spec guide on the lid of the box that tells you where specific wattage should go and for what purpose. But, your fuel pump problem will not be solved by a new fuse.
Posted on May 25, 2009
check the fuel pump fuse/relay, could be just bad enough to cause an intermittent start/no start. and check fuel pressure,spark and the crank position sensor.
Posted on May 27, 2009
Assuming I understand your problem correctly, it sounds as if the car will only start once the check engine light comes on. The check engine light is controlled by the PCM (powertrain control module; or computer) which is also responsible for basically all engine operations including fuel delivery, ignition, emissions, and so on. If this light is not coming on, it means that the computer is not getting power. If the computer is not getting power then it won't start. The fact that you hear the relays click on when the light comes on is another indicator the the computer is not getting power as it also supplies power to the ASD (Automatic Shutdown Relay) which in turn supplies the power to the fuel and ignition systems. Check the ASD relay located in the power distribution center, if it is the same relay number as another un-important system, then swap it out to see if that helps. Make sure the plugs going into the computer are tight. The delay in the power going to the PCM sounds like a stuck relay, have someone tap the relays when the light is off to see if comes on. It is also possible that the PCM itself is failing.
Posted on Dec 16, 2008
SOURCE: 2000 Jeep Grand cherokee Laredo
sounds alot the the pcm it controls the fuel pump and ign system but the anti theft would keep it from starting because the key has a transponder in it programmed for that vehicle and that would kill all ign if triggered
Posted on Sep 27, 2009
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