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Now my 98 6cyl, 2WD GC Laredo with nearly the identical problem, The fuel gauge reads empty (tank is full) and it will not start. It has not been ran for over 2 years. I've clean connections and checked the fuses and relays, nothing helps.
There is something with the GC's that does not allow the fuel gage to register. I assume something somewhere is not functioning properly and not allowing the fuel gauge circuit which also must include the fuel pump from operating.
In a previous post I was informed the fuel pump and gauge gets their grounds thru the TCM. Replacing the TCM did cure the 2001 but that's an expensive "trial" for my 98.
Anyone have a workaround to isolate the actual problem? ]
We thought the 98 was out of gas, sitting so long and all, but after adding about 2 gallons it was overflowing. There must be a way to bypass the TCM fuel pump control to determine if that is actually the cause. Sure wish we could make the fuel gauge operate normally when desired.
Anyone know if the TCM from the 2001 GC v-8, 4x4 will work in a 98 GC 6 cly? I would like to try my old TCM in the 98, at least it wouldl start and run for awhile.
Thanks for any suggestions.
g
I had the PCM (computer) replaced. So far so good. It's only been a couple of days, but it hasn't even tried to stall. I put a more detailed post up on 07 April. I had a guy come out with some Jeep specific diagnostic equipment. He hooked it up and found nothing. No codes. A couple of times HIS computer screen blanked. After he disconnected, the jeep stalled. While the key was still on, he hooked back up to look for codes and got no readings at all from the computer. (Bad motherboard so to speak) So the computer was shot and I got a new one. $400 bucks. If you go down that road, DO NOT use Auto Computer Exchange from Davie Florida. I have heard nightmares about their products and customer support. Good Luck
There is also the smell of rich gas.
We changed the fuel filter and filled it up with gas treatment and premium gas. Helped a little but did not fix the problem.
Could this be the o2 sensor?
There have been many things replaced but I will have to get a list. He just drove 3 hours away and called me to tell me that he had to add transmission fluid twice because it keeps running out and shutting off. I guess it sprayed all over the underneath of the Jeep, all the way up the back window! (The transmission has been replaced recently). Could it just be a seal bad? Another thing, he just mentioned the check engine light is on and flashing. We are going crazy over this whole situation!!
PLEASE someone help us!!! :sick:
I have the V8 engine 2wd and it's a 2004 Jeep Gran Cherokee, it has about 73k miles and has been great ever since I bought it.
I would say about almost a year ago the car wouldn't start out of the blue in the morning. I turned the key, all dash lights came on and when I turned the key nothing happened dead silence. No engine turn over or clicking nothing but silence. I thought the battery was dead so I tried turning the front ligts on (was still dark outside) and they were bright. I took the key out and tried again, nothing. Then I tried one last time and vrooom! started like a champ.
I just thought to myself that was odd, anyway weeks went by no problems. Then happened again a month or so later (varying from 10 minutes to 20 min won't start after several tries), with almost identical results. I have also tried putting it in neutral and pressing brake with no results. Long story short, I have replaced the battery (made sure amperage was correct for that car), I replaced the starter and had a mechanic and local dealer look at it but both say they can't find anything wrong with it.
Here are some clues and more experiences I have had. More recently the car would not start in the a.m. but this time 4 hours later and it would still not start, so i called the tow truck who tried himself and wouldn't start. He towed it to local mechanic and of course it started on first try there.
The mechanic checked the starter relay and it is functioning fine. Lastly i notice a pattern, if I leave the car parked for more than 2 days without starting, then the 3rd day it tends to not want to start. Just yesterday the car wouldn't start in the morning so i took another car to work, when i came home it still wouldn't start until the fourth try turning the key vrooom! no problem or hesitation.
If I start the car every day it starts more often with no issue but it is not gauranteed just left often. I am asking if other people have had this issue or if anyone has any ideas?
I am honestly at my whits end of what to do to get this fixed.
Thank You
Recently I began looking into it again.I replaced the battery because it died over the winter and was 6 years old. It cranked but again would not start unless givin gas.And would not idle until I held it at a steady RPM for a minute or so then slowly released my foot. I also noticed that if I stomp on the gas, when she decelerates she stalls out or bogs down to about 300 RPM and climbs back to about 750 RPM. I'm thinking TP sensor. I am not getting a engine light or any codes.I would think if I have a sensor problem I would be getting a code. This is really troubling. I also have now been hearing chirping from the cargo area leading me to question the fuel pump.Could the pump be making noise because it sat for a few months? Or is it most likely a sign it needs to be replaced?
Said most likely that is why I am not getting any codes for my Jeeps problems.
He said the PCM gets bad data at some point and goes into sort of a state of limbo.It may still communicate with the engine and sensors but stops giving out diagnostic codes to the driver.Or it will give you a code but you'll never be able to clear it even after making the required repairs.
I have heard many on here who were sold new PCM's and I am begining to wonder if all they had to do was contact a Jeep dealer? You see a small time mechanic who may be a very skilled mechanic but not a dedicated Mopar/Jeep mechanic is going to hook up diagnostics.If the PCM does not send data it's going to be condemned 10 out of 10 times.And almost all times a new one will either fix the jeeps problems or atleast now give out codes.But maybe the PCM was still good and only needed to be flashed by Jeep? Just a thought.
Mines going in as soon as the mechanic down the road is done looking it over.
So if your beating your head against the wall on a mysterious issue and not getting engine light or any codes. Check to see if your on a recall list for the OBD?
If it is? they can flash it for free.As long as the PCM is good either it will cure the issues or atleast now give out data telling where to begin.
So if your OBD is not giving you any codes for a ailing issue?Check your VIN with a dealer and if needed get the flashes done.Because without it your PCM cannot communicate with you acuratly.
Emissions Recall No. 882 - REPROGRAM PCM: OBD READINESS CODES
Recall Date: December 2000
Emissions Recall No. 8591/8592 - REPROGRAM PCM: CATALYST MONITOR
Recall Date: March 2000
Thx
Did you ever figure out what the problem was? I have the exact same problem with my 96 GC 4.0 six. 191000 miles. Mine stopped in the middle of a 4 hour trip by the side of the highway though!
To the response from tuggajb, my fuses are straight, would the ignition switch kill the vehicle and the guages while running down the highway?
Thanks for any help all.
any help
dealer has replaced computer and ignition - did 3rd attempt for lemon law but they can not make it die so nothing wrong with it - we can not make it happen but it has died since computer fixed. now waiting for lemon cases to move forward due to sale of Chrysler.
Any other ideas of what we can check to prove there is an issue? :lemon:
I had the EXACT same problem yesterday. My issue began after the vehicle was running. I heard a loud pop from the radio speakers and observed the voltage gauge floating while driving. After I got home and turned the Jeep off, it would not crank. No interior or brake lights, nothing at all that indicated I even had a battery connected. All of my gauges were pulsing and flipping over wildly with or without the key in the ignition and I could hear a faint clicking noise timed perfectly with the pulsing of the gauges. I let it sit for about an hour and it finally looked normal on the dash and sure enough - it turned over fine and all my gauges are back to normal. Even the pre-sets on the radio are still there. The only noticeable difference is that my clock on the radio is wrong.
Did you ever find out the problem?
Has anyone else encountered this problem and if so - what's my next step in troubleshooting this issue?
Same vehicle - 2004 Jeep Grand Cherokee Limited (83k)
I need help!!!
Anyone come up with a solution for this yet?