help before snow
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Member
Joined: Apr 2012
Posts: 157
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From: illinois
Year: 1999
Model: Cherokee
Engine: 4.0
Got a 99 4.0 automatic that's giving me a shaky idle wether in gear, neutral or park. I've replaced the plugs with champions, Taylor 8.2mm wires, cap, rotor, and optima battery. Not only does the needle shake a bit but the Jeep vibrates while standing still. Once I give it gas it runs great and smooths out. It only does it while standing still, cold or warm. It even starts up right away. Could this be a bad ignition coil? injector? Btw no check engine and no stored codes either. Please help
Seasoned Member
Joined: Jan 2011
Posts: 493
Likes: 0
From: Grand Haven, Michigan
Year: 1999
Model: Cherokee
Engine: 4.0 I6
Got a 99 4.0 automatic that's giving me a shaky idle wether in gear, neutral or park. I've replaced the plugs with champions, Taylor 8.2mm wires, cap, rotor, and optima battery. Not only does the needle shake a bit but the Jeep vibrates while standing still. Once I give it gas it runs great and smooths out. It only does it while standing still, cold or warm. It even starts up right away. Could this be a bad ignition coil? injector? Btw no check engine and no stored codes either. Please help
hope it helps
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