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Jeep Cherokee Grand Cherokee Engine and Performance Problems

568 messages,  Last post on Dec 01, 2009 at 6:46 PM

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What is this discussion about? Jeep Grand Cherokee, Jeep Grand Cherokee SRT-8, Jeep Cherokee, Engine, SUV

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#530 of 568 Re: 2006 Jeep GC w/ 5.7 Hemi - weird issue when level on the gas [slaught1] by sanewcomb Jun 02, 2009 (6:42 am)
Replying to: slaught1 (Jun 01, 2009 4:10 am) Thanks for all the replies... You have to wonder exactly how anything gets fixed nowadays with so much stuff that could go wrong! Anyway, I had another reply from another site. This is from a 15 yr certified Jeep/Chrysler mechanic. I'm going to try this first and go from there. Maybe it will help someone else too... "'this trans had problems with the dipstick tube letting water into the trans-usually need lots of water for this to happen--my suggestion is get the trans serviced--make sure to use the mopar fluid-this trans is picky-you may have to have it done twice if the fluid is bad--when they pull the pan if it has water in it the fluid will look milky--if that is the case you will need an overhaul--the clutch discs are glued on with water based glue--if not then try driving it for about 100 miles if the shudder is still there you will need a new torque converter-also make sure the trans controller is up to date'
#531 of 568 4.0 misfire: ignition coil by smithed Jun 04, 2009 (11:48 am)
I had been getting a check engine light for some time and poor performance, sputtering, etc. (2001 4.0L) The codes read as a misfire on cylinder 6. I changed plugs, looked over the wires. No good came of that. The Jeep was in for another issue (radiator hose burst) and the guy working on it said he was a dealer Jeep mechanic for 15 years and that the problem was always the ignition coils that are in the long bar that plugs into the spark plugs. He was great: said I should do it to save money. The coil pack was about $125 and I installed it in about 30 minutes. Now it runs great.   Still the check engine light is on. Will the light go off eventually? How do I reset the codes so it goes off? or Does the fact that it is still on (only driven 10 miles) mean that something else is wrong?   Thanks
#532 of 568 '05 WK 4.7 misfire when throttle is barely open by stanbo Jun 05, 2009 (9:41 am)
My misfire only happens when the throttle is barely open, when I stomp it it's gravy. The other day it shut off when pulling up to a stop light, started back no problem. I have had a few codes come through, random cylinder misfire and misfire in cylinder 8. I changed the plugs, TPS, and coil-pack for cylinder 8. Over time the misfire has gotten worse the codes have changed slighty, random cylinder misfire, fuel system too lean, fuel system too rich. Just took it to a dealer, they said to change the plugs, and run a fuel induction service. Any thoughts?
#533 of 568 1992 Jeep Cherokee by soggybottom Jun 07, 2009 (7:56 pm)
Help. I purchased a 92 jeep Cherokee for my grand daughter since her parents could not afford to buy jer a car. I am 66 years old and on a fixed income as well as being in poor health, but she could not hope to get a scholarship to college without transportation. This jeep had multiple issues which i repaired. The reason it was sold to me for $500 was a lot of noise in the engine when it was running. All the torque converter bolts except one had fallen out and were in the inspection pan. Not the water pump is squeling and i have no clue how to replace it. Please help me with some advice. I am mechanically inclined but have limited mobility, but can not afford to hire this out. Replies to this message: yeats66 (Jun 08, 2009 1:58 pm) eric784254 (Jul 25, 2009 6:41 am)
#534 of 568 2001 Jeep Cherokee Aniv Engine Idle Problems after Rebuil by yeats66 Jun 08, 2009 (1:52 pm)
Well I after trying to figure out why I was having idling problems...I realized that one of the spark plugs had oil on it. So I am assuming that it was not firing correctly on that cylinder. Also, before I could do anything else....I started to have white smoke come out of my tail pipe..head problem? Also I noticed that there is coolant leaking between my engine and tranny (around the bell housing) I could not find a leak on the back side of the head...just in case it was leaking from the gasket and seeping down into the bell housing. Any ideas anyone?
#535 of 568 Re: 1992 Jeep Cherokee [soggybottom] by yeats66 Jun 08, 2009 (1:58 pm)
Replying to: soggybottom (Jun 07, 2009 7:56 pm) The water pump is pretty easy to replace (Easy on an inline 6 cylinder 4.0) Take both the fan shroud and the electric fan off. Should be 4 screws. Then you have to loosen the power steering pump so you can free the belt. Then there are 5 bolts on the water pump. Remove those then clean up the surface to prepare it for the new one. Make sure it is very smooth..this way you have a good seal when you put the new pump and gasket on. I always like to take a little bit of RTV sealant and apply a thin layer to the new gasket before applying. Also while you are messing with stuff...I would go ahead and replace the thermostat which is located above the waterpump. You will see the radiator and heater hose connected to the inlet. Take both of those off and remove the two bolt. Clean both surfaces and install the new thermostats. Hope this helps you.
#536 of 568 Come chat with us! by tidester HOST Jun 08, 2009 (7:05 pm)
Join us this Wednesday night from 6-7 pm Pacific (9-10 pm Eastern) to talk about the latest happenings in the automotive industry. From dealership closings and warranties to bankrupcty filings and resale values, we are here to chat and answer questions. Phil Reed and others from edmunds.com will be featured participants.   Use the link at the top of this page at the designated time to take part in the discussion.   tidester, host SUVs and Smart Shopper
#537 of 568 sputter stutter by mikk1 Jun 09, 2009 (7:47 pm)
I have a 99 JGC and I recently installed a new water pump. It was an easy job and all went like clockwork, however, since then it idles ruff and almost stalls when it idles down. I did disconnect the battery while I doing the job and I have checked the engine to see if and wires or anything had gotten disconnected or what not. Is there anything I needed to do after reconnecting the battery?
#538 of 568 Re: p cherokee engine ???? [lunghd] by eric784254 Jun 26, 2009 (9:53 am)
Replying to: lunghd (Feb 07, 2007 9:22 am) havin a problem with my jgc1998 4.0 litre. got the iac replaced & fixed that problem, now whenn i go to take off it sounds like its backfiring through the throttle body. replaced plus, wires, cap, & button. gapped plugs to specs, replaced wires one at a time not to get them crossed & made sure they fit tight on the plugs and cap. after it warms up to normal operating temp., its worse. from a stop sign for example, when i push on the go pedal it doesnt want to go. replaced the map sensor also. could it be my tps sensor ?no check engine light on ? if i cant fix this problem im going to be forced to sell it. please help Replies to this message: indianajames (Jun 26, 2009 12:32 pm)
#539 of 568 Re: p cherokee engine ???? [eric784254] by indianajames Jun 26, 2009 (12:32 pm)
Replying to: eric784254 (Jun 26, 2009 9:53 am) I had exactly the same problem with my jgc 4.0 litre. Changed the coil, mps,etc. I also did not have a check engine light. Symptoms were just the same as yours. Finally I had the fuel tank removed and cleaned and a new fuel pump put in. The old one was running at 50% capacity.   My Jeep is now running like a dream and has been for months.   I have been told, subsequently, that this is not uncommon. It took me weeks however, to finally find the solution.   I hope this will help solve your problem. Good luck.

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