Question about 2002 Jeep Grand Cherokee

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2002 jeep grand cherokee 4.7L engine dies at random jerks and lundges when put into or changing gears this all started when i tried to set the cruise control any ideas

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Keith Heavilin had the right answer to the problem. Thanks again Keith!!! When i ran a scan on the jeep it came up po123, which is tps sig input a high. Keith told me to replace the clock spring and now it is fixed. He said this is a common problem on jeep grand cherokees. i wish i would have known this before i spent 100$ on a tps unit

Posted on Jul 24, 2009

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If you go auto zone get hook up there pocket pc and read the codes go from there. you can buy one but why when someone will do for free.
See if you can figure what the code come up ore many.
They can tell you in round about why what wrong take the codes what they say talk part service guy get much free information from them ok . Jeeps are **** for fuel pumps to warn you i got one i need do now

Posted on Jul 24, 2009

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1 Answer

Was driving my 98 jeep cherokee and the check engine light came on then battery guage went to zero. killed the jeep the it wouldnt start bu heard clicking noise.waited a while and jeep started but when I...


check the fuses make sure none of them blew and if its not that then its proble a bad alternator, witch caused the ripple effect when one thing goes on a newer car no matter how small it will trigger a bunch of random events such as transmission not going into gear, i assume its a automatic i highly dought that the tps went with the low voltage, and if your hearing a clicking noise its either not enough juice going to the starter, or a coil wire popped off

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First I suggest scanned the fault codes stored there; turn the ignition key (without start engine) "on/off on/off on" and read odometer codes Pxxxx. Note this codes and send us for other details.

Keep in touch.

Dec 06, 2012 | 1996 Jeep Grand Cherokee

1 Answer

2002 grand cherokee, overland 4,7L engine doesnt


Hi Joko,

What you are describing is a failure of a main circuit. The first thing you should check is yo make sure that your battery is in good condition and that the cables are clean and tight. Let me know if yu find anything wrong there. Then there may be another main circuit problem. Check all of the fuses in your fuse block in the engine compartment. If any of these fuses are blown, it will usually cause several things to not work. If you find any fuses blown, DON'T REPLACE IT YET. Let me know WHICH fuse is blown and I can help you find out why it blew so you can get the problem fixed.

Get back to me on this and we will continue.

-Dave (dttech)

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sounds like a fule problem to me,,,

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First check battery condition, second was the syc set after install?

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You say you changed the cam sensor. A1391 code is a crank sensor on the top of the trans. bell housing.

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i recommend cleaning the throttle plates. they are located unter the intake hose form the engine to the air filter housing. if you open them with the engine not runniong you will see they will be covered in carbon. use a good carb cleaner and a rag to wipe them clean

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