misfire problems

2001 JEEP GRAND CHEROKEE
125 MILES • 6 CYL • 2WD • AUTOMATIC
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MRK11462
  • MEMBER
  • 1 POST
I have a 2001 grand cherokee 4.0 6 cly automatic i had the motor rebuilt 2 yrs ago now after it warm's up i get a chack engine light on saying that it's misfireing on 1,3,5,6 cyl's and it is.i checked the plug's there ok.Ireset the computer i just found out when you kick it into overdrive it kicks down but like there's no gas or spark like it shut off but if you let off the gas a little it run's.Could it be the computer?
Nov 14, 2010 at 12:19 PM
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BMRFIXIT
  • CAR REPAIR CONTRIBUTOR
  • 19,053 POSTS
What do you have for fuel pressure ?
Check coil too

do you have one coil pack on it very common failure if so have it checked
good luck
Nov 14, 2010 at 12:24 PM
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TAZZ49
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  • 3 POSTS
Had a wrangler that had a miss fire on cyl 3, it had one long coil pack and that was bad replaced that and runs fine now..
Nov 14, 2010 at 1:52 PM
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