96 GC 4.0ltr running rough
06-13-2009, 06:08 AM
#1
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Year: 1996
Model: Grand Cherokee
Engine: 3960
96 GC 4.0ltr running rough
HI
I have a problem with my Grand Cherokee. It idles Rough and loses power quite badly but this only happens occasionally. I have tried all the usual culprits I.E. throttle body sensors (IAC,TPS,MAP) I have checked the wiring on them as well, I have also cleaned the throttle body. The battery is all fine, I have checked the Earths but am unsure how to check them thoroughly. the strange thing is I also hae a single point LPG conversion on it aswell and that never has any problems. I am totally at a loss with it. I have asked many people online and in person about it and they cant really think of anything. also I have done Voltage and Resistance checks on the IAT and the engine coolant temperature sensor and they all seem to be operating fine. Hopefully one of you Guys can help me out. I just have no idea what to try next. I did think it could be something to do with the fuel pump but I dont know, It seems fine????? I have been told that it could be something linked to thye fuel delivery electrics. Can anyone help! Thanks JayDee
I have also checked the clock spring and vacuum hoses
I have a problem with my Grand Cherokee. It idles Rough and loses power quite badly but this only happens occasionally. I have tried all the usual culprits I.E. throttle body sensors (IAC,TPS,MAP) I have checked the wiring on them as well, I have also cleaned the throttle body. The battery is all fine, I have checked the Earths but am unsure how to check them thoroughly. the strange thing is I also hae a single point LPG conversion on it aswell and that never has any problems. I am totally at a loss with it. I have asked many people online and in person about it and they cant really think of anything. also I have done Voltage and Resistance checks on the IAT and the engine coolant temperature sensor and they all seem to be operating fine. Hopefully one of you Guys can help me out. I just have no idea what to try next. I did think it could be something to do with the fuel pump but I dont know, It seems fine????? I have been told that it could be something linked to thye fuel delivery electrics. Can anyone help! Thanks JayDee
I have also checked the clock spring and vacuum hoses
06-13-2009, 08:29 AM
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Year: 2004
Model: Grand Cherokee
Engine: 4.7L V8
Then I won't even venture a guess, as I'm unfamiliar with that system. Sorry. I'm sure others on here will come to your assistance.
06-13-2009, 08:40 AM
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Year: 1996
Model: Grand Cherokee
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thats ok. I am starting to get an inkling that it could be one or both of the lambda sensors. at least that is one of the things I have nt checked yet. I have gone through so much I thought I would have hit the problem by now. Very frustrating! Thanks anyway, hopefully someone will have a suggestion
06-13-2009, 09:27 AM
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Year: 1996
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I have done the plugs and leads. I have got a distributor ready to go on which I hope should imrove it, if not then the investigation will continue. Its quite baffling.
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