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96 Grand Cherokee Laredo Rough Idle

Tiny
LUMBERJACKNICK
  • MEMBER
  • 1996 JEEP GRAND CHEROKEE LAREDO
I have a 1996 Grand Cherokee Laredo I6 4.0L that when you start it it sounds fine then after about 3 minutes the engine sounds like its going to die and the RPM's drop to almost stalling. It only lasts a minute or so. Now it seems to have a rough idle. I have replaced the fuel filter and plugs but this started before this. It has 135k on it. Everything else has been kept up but I think after a few rough towing trips a few months back it might have screwed something up. Please help.
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Sunday, October 28th, 2007 AT 11:30 AM

1 Reply

Tiny
2CARPRO JACK
  • MECHANIC
  • 11,533 POSTS
For starters clean out the throttle bore (where the air intake tube goes to engine) with some carb spray and a rag. On the throtle body is the IAC motor (lowest sensor on throttlebody) held on with 2 Torx screws. Remove it and clean it well with carb spray, careful not to loose the small o'ring
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Monday, October 29th, 2007 AT 7:48 AM

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