Hello Lubie...
I would STRONGLY recommend you get your codes read...
I TRIED ALL that TOO...
Finally my codes... said the OXYGEN SENSORS were complaining... OBD... DTC
(on-board-diagnostic... DIAGNOSTIC TROUBLE CODES)
So... of course I changed the... OXYGEN SENSORS.
The "NEW" OXYGEN SENSORS complained just as well...
I have subsequently learned the "SENSORS" are
just doing their job...
In my case reporting on a collapsed catalytic converter.
(muffler is actually a MORE common blockage).
A little hunting around... like Auto-Zone ... Napa auto...
Pep-boys... O'Reilly Auto Parts... even MIDAS might
yield FREE READINGs... (check around).
Just remember to wear your best SALES RESISTANCE...
and look up you prices on ROCKAUTO...
before you go... Hope this helps.
ROCKAUTO
1998 JEEP CHEROKEE 4 0L L6 Catalytic Converter RockAuto
1995 JEEP CHEROKEE 4 0L L6 Catalytic Converter RockAuto
Carnac the Magnificent
SOURCE: Valve knocks when running reaches 1500 rpm
First, nothing you have done has anything to do with valve tappet noise. What is your oil pressure? Have you positively identified the noise as a lifter (tappet), OR COULD IT BE AN ENGINE BERARING OR WRISTPIN? Other than tearing it down and replacing lifters, rockers or pushrods or possibly even the cam, if oil pressure is good, change the oil and put a quart of Marvel oil in there. If that does not clear it up in a few days, you will have to go inside the engine. You likely have over 160k on that engine...consider using a replacement. Get an older tech to listen to it...it takes years to be able to differentiate between different component noises with any accuracy.
Personally, without hearing it myself, I'm betting it's a rod knock.
SOURCE: It will not start unless you dump gas into
You may have a defective fuel pump relay which is mounted near the center of the fire wall area. Also check for any securty lock out or problem. If all passes ok, then check the fuel pump for pressure at the fuel rail.
SOURCE: 1997 jeep grand cherokee laredo
Code 12 is battery having been disconnected. It sounds like you may have the firing order right but may be one tower off in the rotation. Sounds like engine timing is too far advanced. Remember, I'm not there so I can't see or hear what you can, but that's what it seems like.
SOURCE: 1996 Jeep Grand Cherokee No Start
I would be thinking that there is a good chance that you need to be checking out replacing the computer, if you aren't getting any communication with the proper scan tool then the computer isn't communicating with anything in the vehicle...... I would have guessed first off that the ignition control module might be bad but that is obviously part of the computer also, I would be looking in that direction.
SOURCE: 1997 jeep grand Cherokee laredo hesitation problem
You should add a rs4 performance chip or the fuel economy chip also made by rs4. there like 70 bucks. If the problem is electrical changing your chip could solve the problem. Even if is doesnt work the chip will make your truck idle more smoothly, have better throttle response, and you will add 3-7 mpg. I bought one for my 1997 jeep grand cherokee straight six, and it felt like i was driving a different truck . It mae that much of a difference...you cant loose!!!Like everyone says , it could be a vac leak or a clogged fuel filter , soetimes bad gas...your problem is a needle in haystack. Try the chip...I hope this helps
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