Last post on Oct 28, 2013 at 4:35 PM
You are in the Jeep Cherokee and Jeep Grand Cherokee
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Jeep Grand Cherokee, Jeep Grand Cherokee SRT-8, Jeep Cherokee, Engine, SUV
#351 of 731 01 Grand Cherokee 4.7 engine issues
Feb 10, 2008 (3:42 pm)
hello, I have a 2001 jeep grand Cherokee limited wheel drive with a 4.7. I recently had a bent exhaust valve in #7 cylinder. The guide to one of the secondary chains broke and i jumped time. I took it apart, had a valve job done to that head , then put it back together with a new gasket kit. I also put new plugs in it. It runs like crap, like its running on 7 cylinders. I did a compression test and all 4 cylinders on that side have close to 150. the check engine light is on sometimes bu not much and when i took it to auto zone to get the code it came up bad O2 sensor on #1 Bank and that it was running lean. I'm not sure which bank is the #1. It wont idle on its own hardly ever, and lacks power tremendously. I checked the coil packs by unbolting them, putting a plug in them and holding them by the valve cover to see if it arcs, and they all are. It seems to be running very rich now, as it smokes a little black smoke sometimes. I think it is a fuel or fire problem, but not sure where to begin. Could the O2 sensor make it run that bad? Thanks Dave
#353 of 731 another overheating issue at idle.
Feb 14, 2008 (8:03 pm)
i have a 94 jeep cherokee sport that is overheating at idle. it has a new thermostat, flushed cooling system, new hoses. The pressure was tested and its good. however the jeep has 2 fans. one is connected to the pully and one is electric for the A/C. When i have the ac on it doesnt overheat as quickly. does anyone know what could be wrong with it. it runs great considering it has 175K.
#354 of 731 Re: another overheating issue at idle. [thedlydrvr]
Feb 14, 2008 (10:18 pm)
The electric fan isn't just for the A/C, and it sounds as if the electric fan isn't working at all. It is run by a coolant temp. sensor which, of course, turns it on at a specific temp. While idling, listen for it to come on, especially once the engine is warmed up. If it never comes on, that sensor would be the first thing to check. If the sensor isn't the problem, it has to be the fan itself.
#355 of 731 2000 Grand Cherokee 4.0 A/C blows hot
Feb 17, 2008 (7:47 am)
My 2000 JGC will blow hot air from the AC after driving for over 45 minutes or so. Usually after stopping and the engine cools, when I start up again the AC will blow cold then after a while start to blow hot again. Any ideas?
#356 of 731 Re: another overheating issue at idle. [thedlydrvr]
Feb 17, 2008 (10:22 am)
poss the thermo clutch on the engine fan has gone bad when cold fan dosn't turn as fast when hot fan turns faster to chack run engine to temp sut off take hand and turn fan should be hard to turn if not change clutch
#357 of 731 Re: 2000 Grand Cherokee 4.0 A/C blows hot [onedoublel]
Feb 17, 2008 (10:23 am)
sounds as if ac coil is frezzing up pos low on ac fluid have them check that
Feb 17, 2008 (5:06 pm)
i have a grand cherekee .
the thign is vibrating at 70 miles per hour.
anyone know what may it may be
#360 of 731 Re: another overheating issue at idle. [dixiecrawler]
Feb 17, 2008 (5:35 pm)
where is the sensor? I will have it changed out if thats the case.