Last post on Oct 29, 2013 at 2:17 PM
You are in the Jeep Cherokee and Jeep Grand Cherokee
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Jeep Cherokee, Transmission, SUV
#239 of 276 Fuel pump not running correctly
Aug 25, 2011 (11:13 am)
I've got a 1993 Jeep Cherokee Country 4.0L that's been sitting for a while with what I thought was a bad fuel pump... Here's the story.
It started having issues starting, especially when it was cold. When it did run, it would often have trouble accelerating. Eventually it would just refuse to start for weeks on end, and then randomly start up again. Finally, after a month or so of not starting at all, I tried banging on the gas tank while my buddy cranked her, and she started. The mechanic I took it to confirmed that it was probably the fuel pump, but being that I didn't want to pay $500 for the job, I decided to do it myself.
I dropped the tank, replaced the pump (correctly, to the best of my knowledge), and tried to start it again... Still wouldn't start. I checked the sparks, they were good; then checked the fuel pressure... none. So based on this information, the issue seems to be within the fuel system. I then replaced the fuel filter and the pump relay... Still nothing. So I started paying specific attention to the sound of the pump itself when I turn the car ON (not starting). From what I understand, it's supposed to make a sound for a few seconds, then stop. Mine only makes that sound for maybe half a second. And here's the funny thing. After like the second or third time I turn my car on and off, the pump stopped making the sound altogether...
I thought maybe the auto shop gave me a faulty pump, so I exchanged it for a new one. After a reinstallation, the jeep STILL won't start... And the fuel pump makes the noise only every so often when I turn the key to ON, maybe less than half the time...
So I'm thinking it may have something to do with the electrical system going to the pump itself... perhaps it's getting current but not enough? Anyway, I am absolutely stumped here... Can anybody help?
Sorry for the long post, but thanks in advance
#242 of 276 99 CHEROKEE STALLING AND TROUBLE STARTING
Sep 08, 2011 (11:11 pm)
My 99 4.0 cherokee is stalling out when I come to a stop, and is having trouble starting. I have to pump the gas at start other wise it wont start. I've replaced cap, plugs, rotor and wires which was no help. It is also idling very rough. If anyone has had this problem and was able to resolve please help.
#243 of 276 99 Grand Cherokee Lar. 4.0 4x4
Sep 09, 2011 (3:38 am)
Hey. I feel your pain. Is there a check engine light? If so, have you put it in the shop to have it diagnosed? My 99 Grand Cherokee has the V8, and may have a completely different problem than your straight-six.
My truck was stalling at stoplights, and replacing the oxygen sensors fixed the problem. However, I was having no problems with it starting. How many miles does it have? Have you replaced the plugs? What other repairs have you had? Many times when you have symptoms like this it is the ECU (Engine computer), not a mechanical problem. I replaced my computer at 98k, and all of a sudden everything worked great again. :=)
The computer was $200.00 on Ebay motors. It will cost you $1200 at the dealer. FYI
Sorry, but you have to be just a little more specific due to the plethora of problems these trucks can have.
#244 of 276 Re: 99 Grand Cherokee Lar. 4.0 4x4 [cski]
Sep 09, 2011 (7:21 am)
That's petty much all the work I have had done I just bought the jeep a month ago and just started to have this problem. It has 210,000 miles on it. I'll try the oxygen sensor first and no the check engine light isn't on so I never took it to be placed on the computer to have it diagnosed.
#246 of 276 1992 Jeep cherokee, want crank
Sep 12, 2011 (6:02 am)
I have a 1992 Jeep Cherokee, 6 cylinder. It was running fine, then noticed at times it wasnt wanting to turn over, so i would turn ignition switch off, then try and it would crank. Friday, went to the store, fine, came out wouldnt crank. We replaced the ignition (with key) cranked up, ran fine for 2 days. this morning i get gas, turn off engine, want crank or turn over, the lights, horn, etc all work. the dash gages come on. but want crank. could it be the Ignition switch? If so, where is that located> in steering column or in hood? HELP !
#247 of 276 Re: 1992 Jeep cherokee, want crank [forhisglory07]
Sep 12, 2011 (10:49 am)
Have the same problem with my 2008. Put a new starter in today. Not the problem. The guy who towed my vehicle suggested some type of relay problem. With a 1992 you may want to check the wiring to the starter for corrosion or bare/worn wire(s). Be sure and disconnect battery before messing with the terminals on starter. Another possibility is the neutral safety switch (NSS). Won't allow the car to be started if it is not working right. Good luck. From what I have seen with these Jeeps you are going to need it.
#248 of 276 Re: 99 CHEROKEE STALLING AND TROUBLE STARTING [el33]
Oct 13, 2011 (4:03 pm)
Have you checked the IAC Valve for carbon build up? You may want to have your TPS tested as well. Both are located in the throttle body. If the IAC has alot of carbon built up on it, I would replace it first, or buy some sensor safe cleaner to remove the carbon. Cleaning out the whole throttle body out makes a big difference.