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97 Jeep Grand Cherokee surges and idles rough. Please help

Tiny
J02WS6TRANSAM
  • MEMBER
  • 1997 JEEP GRAND CHEROKEE
  • 4.0L
  • 6 CYL
  • 4WD
  • AUTOMATIC
  • 130,000 MILES
Hello, I have a 97 Grand Cherokee with a 4.0. The car has about 130k miles on it. I can drive the car sometimes and I have no problem. Then usually seems like when its hot after awhile of driving like going up hills or on the highway going up hills the car with start to surge and sputter like it has no power. I will pull over and it will idle like crap and not stall but seem like it wants to. If I shut it off and restart it, the car is fine again for awhile. Seems like a fuel problem so I replaced the entire fuel assembly in the tank. Fuel pump, regulator, filter. Whole thing. Didnt make a difference. The car had a full tune up not too long ago, but I dont think it could be anything like that cause it doesnt always do it, and when it does if I pull over shut it off and turn it back on its fine. Weird. Any thoughts? Thank you for your help
Jon
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Friday, August 15th, 2014 AT 4:21 AM

3 Replies

Tiny
WRENCHTECH
  • MECHANIC
  • 20,761 POSTS
Start out by having the computer scanned for any codes and post the numbers here.
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Friday, August 15th, 2014 AT 5:42 AM
Tiny
J02WS6TRANSAM
  • MEMBER
  • 34 POSTS
Thank you for the fast response. I do remember I had it scanned and I had a code for some 02 sensors but dont remember the codes or which ones they were.
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Friday, August 15th, 2014 AT 6:28 AM
Tiny
WRENCHTECH
  • MECHANIC
  • 20,761 POSTS
Old codes wouldn't matter anyway. Have it scanned now and get the exact code numbers, not someone's interpretation of them.
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Friday, August 15th, 2014 AT 7:41 AM

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