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Jeep Grand Cherokee Maintenance and Repair

4609 messages,  Last post on Dec 02, 2009 at 6:10 AM

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#4329 of 4609 red lines it self by s_morgan Nov 23, 2008 (10:54 am)
i have 99 JGC that i just replaced the head gasket on my self but when i start it, it will pin its self to red line i have shut it down before it reaches it every time but i can not figure out what is going on i have checked every connection and i had color coded them all before disconnecting and thing all seems to be good there, i have checked the throtle body to see if it is stuck open but its working fine and i cant get any codes out of it any ideas Replies to this message: smokebee (Nov 24, 2008 9:37 am) animal2 (Nov 24, 2008 10:34 am) clipkarn (Nov 25, 2008 7:03 pm) troll157 (Nov 25, 2008 8:19 pm) paule (Nov 25, 2008 9:06 pm)
#4330 of 4609 Re: red lines it self [s_morgan] by smokebee Nov 24, 2008 (9:37 am)
Replying to: s_morgan (Nov 23, 2008 10:54 am) TRY this----engine off---key in ignition--trans in neutral. Place foot on brake, hold it--at the same time turn key in this manner--on-off,on-off,on. Sometimes this will clear codes and problems.   If this does not work---disconnect the negative batt cable and let it sit for ten min. Usually this will clear any codes and bring everything back to normal.   The key trick clears my ck eingine light problems. Good luck Smokey Swann
#4331 of 4609 manifold gasket by countrygirl113 Nov 24, 2008 (10:07 am)
how hard is it to change the exhaust manifold gasket on a 98 jgc?the gasket is only 10 bucks but i dont want to pour a ton of money in it at the shop again......I too have the love hate relationship.......thanks.......
#4332 of 4609 Re: red lines it self [s_morgan] by animal2 Nov 24, 2008 (10:34 am)
Replying to: s_morgan (Nov 23, 2008 10:54 am) your problem is not computer related you have a air line,hose left unattached that is bleeding air in after the throttle body look for a open port before starting again.
#4333 of 4609 Re: Can 94 engine go in 90 Jeep Cherokee limited? [sassafrasnanc] by rself Nov 24, 2008 (8:13 pm)
Replying to: sassafrasnanc (Nov 05, 2008 4:56 pm) if both engines are the inline 6 then the answer would be yes you might have to change the motor mounts but they should bolt up the same.
#4334 of 4609 Re: red lines it self [s_morgan] by clipkarn Nov 25, 2008 (7:03 pm)
Replying to: s_morgan (Nov 23, 2008 10:54 am) Still having red line fun? If you didn't find an air leak like one of the other guys suggested, you might investigate the crankshaft position sensor (CPS). When I was having some glitches with my CPS, on one reinstall, the engine did what you describe. Well, not to red line, but definitely ran away. After another remove, clean and replace, it worked fine. It's a bitch to get at. Behind the right exhaust manifold on the block where the bell housing bolts on. Might be worth a look.   Good luck --- Clip Replies to this message: troll157 (Nov 25, 2008 8:19 pm) paule (Nov 25, 2008 9:06 pm)
#4335 of 4609 Re: red lines it self [clipkarn] by troll157 Nov 25, 2008 (8:19 pm)
Replying to: clipkarn (Nov 25, 2008 7:03 pm) My '89 was doing the same thing awhile back, I'd have to shut it down. Difference is that after a couple of times, It'd get it's act right. You have cruise control? Was thinking about it awhile, you checked the throttle plate, Have you checked the Idle air motor? Maybe doesn't even have one, I don't know. Pintle doesn't move thoroughly and smoothly, the machine won't idle correctly. DON"T move the pintle in or out manually, messes 'em up, supposedly. I'd disconnect ALL linkage/sprin gs, etc. from the throttle-body and try it again. Hold the throttle shut with your hand, or something. Let someone else start it though, so's you might visually check the the mechanics of it all. I don't know what would happened if you were to remove the Idle-air-control motor and, CAREFULLY, metered the "controlled" air flow into the idle-air circuit manually. ie Shove a finger or such into the port the idle motor come from, stop or slow the air flow from the port inside, the port, and see what happens. Leave the motor connected to the harness, set it carefully somewhere safe and observe it's operation while you are at it. Oh, the cruise control..... Had a friend long ago, ME, got some vacuum hoses twisted around, and when I thought the'y'd "ONLY connect to those ports one way", It wasn't right at all. Vacuum came up -- so did the rev's--so did the vacuum--so did the rev's, etc. Scarry stuff isn't it? Spine jumps right out of the skin, huh?  At the time mine was acting-up, I'd considered making a plane out of it. Just wouldn't have been as much fun though. You be careful, patient and consider, carefully, what's going on, and you'll be just fine. Have fun. Replies to this message: paule (Nov 25, 2008 9:06 pm)
#4336 of 4609 Re: red lines it self [troll157] by paule Nov 25, 2008 (9:06 pm)
Replying to: troll157 (Nov 25, 2008 8:19 pm) I'd also check your throttle cable again. It almost sounds like it's "hanging" wide open. I had a Dodge Avenger way back when that the dealer replaced the head gasket on. When they put it back together, they hooked the cruise control return spring up wrong. So, the first time I used the cruise control, guess what. Yep, wide open throttle. I had to kill the ignition but not lock the steering column and muscle the car over to the side of the road. You should have seen the look on the face of the service manager when I took the car back in for them to check it out and I told him what had happened!
#4337 of 4609 why the shaking by soxfansc Nov 26, 2008 (3:53 pm)
I just replaced a CV axcle on the drivers side and now the jeep is shaking (steering wheel) whenever I drive over 50 mph and I am not sure why? I should also say that the gears in the hoghead are bad so I also took the front driveshaft out to try to alleviate the the grinding noise I would sometimes hear .Can anyone pass on some suggestions? Replies to this message: tuggajb (Nov 26, 2008 6:24 pm) soxfansc (Nov 26, 2008 7:29 pm) tuggajb (Nov 27, 2008 10:54 am) trickster (Dec 06, 2008 12:24 pm)
#4338 of 4609 Re: why the shaking [soxfansc] by tuggajb Nov 26, 2008 (6:24 pm)
Replying to: soxfansc (Nov 26, 2008 3:53 pm) first of all i would also remove the axel shalfs as if the gears lock up you will realy go for a ride you will not enjoy also prob brake the front axel housing also   the shake could be that you did not get the front hub in strait when you tightened the 3 bolts that hold it in make sure that you didnt get dirt behind it (between the mount serfus and the hub) Replies to this message: soxfansc (Nov 26, 2008 7:29 pm) tuggajb (Nov 27, 2008 10:54 am) trickster (Dec 06, 2008 12:24 pm)

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