Question about 1997 Jeep Grand Cherokee

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1997 jeep cherokee laredo. It wont stop stalling. I had the fuel injectors flushed, new distributor cap and module installed. The computer is not picking up any codes. I actually started running 93 octane in it, its only getting worse. "They" claim I never have to change the fuel filter, I guess cause its in the tank. Then why is it stalling?

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  • katambrus2 Apr 13, 2009

    I was running the 87 octane and the problem continued to get worse. The higher octane did not make a bit of difference. BUT, I will check idle control and my trans torque converter. Do you know if these two items should have pulled up a code? I have no lights lit or codes coming up.

  • hum8 Apr 23, 2009

    Bought used 2 yrs ago. Previuos owner had just replaced plug, dist cap and rotor and wires. About 6 months ago these same issues started happening. However, mine would stall intermittently for the first 10-15 miles and once I got past that it ran well. I've been through a lot of info since then. Even replaced coil since it generated a code. But the mechanic never told me that this code canbe generated also by any of the above parts mentioned. BTW, '97 JC Laredo, 95M miles.

    I was looking for some help recently at Auto-Zone. They have helped me fix more than anyone else!

    The same code came up, coil, but they gave me a printout of causes which made me appreciate the mechanic even less. Then, a guy in line with me told me he had similar problems with an older Jeep. What he told me blew me away and could, hopefully cost many people many $$. He said that the dist cap does not seal well with the distributor which allows condensation into the cap overnight, especially for long periods, 10 days or so. I bought a new cap and rotor. When I looked under the old cap, there was much black corrosion and even sand that had penetrated the inside of the cap. Wrap up. Yesterday I replaced the cap and rotor. In addition I added a bead of high temp permatex silicone (forget the name) to better seal the cap from moisture. I did not mess with the check valve on top of the cap. Today, started well, had one very small hiccup and was fine threreafter. Also ran a bit smoother.

    Don't know if this will be the fix, but it is something I have not heard of before on the boards. You may want to look at how well the dist cap seals with the disributor. Good luck!


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Most late model 90s cars run 87 to 89 octane. some of the hondas and the cadillacs runs 92 octane. i step it down to 87 or 89 .i knew a guy tried running 92 octane in his car it ran terrible. he went to 89 octane.try that if this dont help check idle control . make sure your transmission torque converter not staying lock up.

Posted on Apr 13, 2009

  • Jonah Oneal Apr 13, 2009

    some times . my torque converter switch went bad .the check engine light didnt warn me. my car kept stalling out.check your fuel system.fuel pump pressure .pump relay change fuel filter .change plug and wires.


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So I went through your problem exactly and I'm ******* thrilled to have fixed it I went through 3000$$ trying to fix it and what it was for mine was the PCM cover needs shorter screws it creates a short in the system get 6 4mm washers 3 for both screw and place them on the PCM the two screws can be located below the wiring plug ins if you want to see if you have a short in your system check the ignition coil for 5 or more ohms of resistance if you have less you have a short to ground. Hope it helps

Posted on Feb 03, 2011

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92 jeep cherokee engine cutting out after 30 minutes drive. Random occurrence/highway driving at 45 to 65 MPH. Engine cough/sputtering is dramatic and eventually corrects itself.

Sounds like you may have dirty injectors. Have you tried a good fuel injection cleaner? Lucas is a good product that works. You may have to use it in 2-3 tanks of fuel if the injectors are real dirty.

It would help if you found a shop with a code reader for a 92 Jeep and had them give you the codes. Unfortunately the free code reading service offered by auto parts stores only works on 1996 and later OBDII vehicles. Pre 96 is OBDI, from around 89-95, and requires a different reader or module for each manufacturer. Many shops use a Snap-On reader with different modules, and should have the Jeep module. Cost will vary, but the codes will help diagnose your problem if the injector cleaner doesn't fix it.

Feb 02, 2015 | 1992 Jeep Cherokee Limited

2 Answers

Keeps back firing and stalls

You probably have the distributor installed one tooth off. Or if it was doing this before you did all this the timing chain has jumped a tooth. remove the distributor cap, then set the timing mark on top dead center, then have someone watch the rotor and tell you when it moves then check how many degrees it moved. It should not be no more than about 2-3 degrees if more than that you probably need a timing chain and gears. BigD

Apr 22, 2014 | 1996 Jeep Grand Cherokee

1 Answer


After it stalls, turn the key back on and listen for the fuel pump in the tank. If you don't hear it it's likely it's bad. (bad ones bind when hot and usually show no code).
Otherwise check the wiring continuity for the cps and check the signal from the pickup in the distributor. (check all the way to the computer itself. Of course, check all the relays and make sure they are good (most can be interchanged with each other except for ac relay)

Apr 08, 2011 | 1997 Jeep Grand Cherokee

1 Answer

Need wiring digram from spark plugs to distributor cap

Review the Jeep ZJ Repair Manual in the Firing Order (page 10 and 11) for 4.0L 6-cyl and 5.2L 8-cyl.

I really hope hepled with this (remember rated this help) Good luck.

Nov 18, 2009 | 1997 Jeep Grand Cherokee

2 Answers

I have a jeep grand cherokee laredo with the 4.0L inline 6 and it stalls when driving and is also hard to start. the engine turns over, so i know its getting enough juice but it will not start. after...

have you actually had a fuel pressure test done on this Jeep? I had a 93 cherokee limited and i replaced the fuel pumpo but the new one was bad and it wasnt getting enough psi's

Mar 05, 2009 | 1996 Jeep Grand Cherokee

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