Last post on Dec 05, 2013 at 4:05 PM
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Jeep Grand Cherokee
#34 of 1240 97 Grand Cherokee Shuts Off while moving
Nov 15, 2006 (11:01 pm)
I have a 1997 Grand Cherokee 5.2L V8. It has a problem running. You can be driving down the road and let your foot off the game and the jeep will just shut right off. If you say pull into a parking spot and let your foot off the gas it will shut off. Sometimes you can't even go out there and turn it on and have it stay running unless you keep your foot on the gas. I have heard stuff about the Idle Air Control Valve or anything that has to deal with the vehicle ideling. Any suggestions? I brought it to the jeep place here (an actual Jeep/chrysler place) and they said "We cannot duplicate the problem". I don't understand that becuase when i pulled it in there it shut off while it was still in drive. Needless to say that was a waste of money. So anyone have any ideas on why it may just want to shut off.
#35 of 1240 Re: 97 Grand Cherokee Shuts Off while moving [dotcom012]
Nov 16, 2006 (7:40 pm)
For everyone having stall problems with 95-97 JGC's (I can't speak to pre-95 vehicles) I may have something of interest. Our 96 JGC suffered just as described in the various above posts. I cleaned/checked fuel/ignition/IAC etc. etc. all to no avail. Everytime one came to a stop, it stalled out.
I finally decided to measure and inspect the electrical system using my electronics laboratory test gear (not automotive diagnostics equipment), because I design electronics for a living. I found that we had a "hard" i.e., sulphated battery, which meant that the 13.8-14.4 so-called DC voltage coming from the alternator was really a very, very bad/ripply voltage (since the battery was not able to act as a smoothing filter if you will.)
I put in a brand new battery, bingo! no stall problem anymore.
How can this be you may ask, well methinks that Chrysler has cheaped out on the amount of voltage regulation/ripple rejection circuitry in the ECU, and hence that could certainly lead to the above stall symptom.
Today's automotive technicians should be more than 80% focused on electronics rather than the mechanical, as that is usually the root cause of problems, unlike the old days. And heaven forbid that the great big software company should soon succeed in implanting Windows into our vehicles!!!
Hope this is of interest or helps*****
#36 of 1240 Stall problem sovled with new IAC Valve
Nov 16, 2006 (8:21 pm)
Well, i replaced the IAC valve today and so far not a single problem. My Jeep stays running and hasn't shut off so far. I will get a new battery anywaz to see if that helps anymore. If you happen to change the IAC remember to disconnect the battery before you do this. I guess it is like a computer, you have to restart it to find new hardware. I talked to some people who have just pluged it up after taking the old one out with the same problems. I will let you know on the battery thing though.
#37 of 1240 1989 Cheokee 4.0 starting problems
Nov 17, 2006 (4:18 pm)
I had a good mechanic put a 4.0 Jasper in my 1989 Cherokee. He said it wouldn't start and he thought the problem was the ECU. He installed an ECU and the Jeep ran fine for about 4000 miles. Then it would start one day but not the next. When it doesn't start, there is no spark. I replaced the ICM, ignition coil, distributor, CPS, and EGR valve. It runs great but I never know when it may not start up.
#38 of 1240 Re: 97 Grand Cherokee Shuts Off while moving [wolfblum]
Nov 17, 2006 (6:55 pm)
Well I replaced the battery in my 1995 Jeep Grand Cherokee Limited Inline 6 motor today and it starts up but the Check Engine light still comes on right away??
Engine runs smooth, I don't get it?? Did a spark plug, wires, cap & rotor replacement well over a month ago and check engine light still comes on?? Infinity radio comes on but no sound and everytime I turn the brights on and off the Security light clicks and blinks once?? Anybody have similar problems, any help would greatly be appreciated as I don't have a lot of $$ right now!!
#39 of 1240 Re: 97 Grand Cherokee Shuts Off while moving [dotcom012]
Dec 08, 2006 (5:27 pm)
I have a 95 Grand Cherokee and had a similar problem. While I am driving the engine suddenly shuts off. It usually happened when I stopped at a red light or when I pulled into a parking lot. I could only drive on if I left my foot permanently on the gas pedal. Since it only happened once in a while (and never at the dealership) the mechanics couldn't find anything. I decided to replace the pcv valve because that only cost me a couple dollars and is easy to do. Since that day the problem never occurred again!
#40 of 1240 Idle Problems AND Flickering Lights
Dec 18, 2006 (8:11 am)
I have the SAME issue regarding the idle problem: vehicle will not idle, I have to pop it into Neutral to keep it from stalling out. It is fine once I drive it for a distance (not sure exactly how far it takes, never compared) without stopping. All the above postings really helped with diagnosing.
One thing I had before this was when using lights at night, the interior lights will get really dim and barely visible, and I literally "hit" the headlights lever/dial to get them to come back bright again. Used to work, but that barely works anymore. Then started that idle issue, which went from a very few instances, to about every time I drive now. That with the flickering interior lighting, REALLY makes me lean towards the electrical problem and not so much the IAC, TPS, or PCV replacement.
#41 of 1240 RE: Idle Problems AND Flickering Lights
Dec 18, 2006 (8:13 am)
What I mean by "Interior Lights" is the dashboard lights, clock/radio lights, etc....
#42 of 1240 Stalls 3 seconds after starting
Dec 19, 2006 (8:49 am)
I have a 1994 JGC 5.2 that is hard to start and when it does it runs for about 3 seconds and shuts off, if you try to give it any fuel at all it immediately shuts down. any ideas?