Rough Idle, Vibration at Highway Speed -
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Unread 05-14-2013, 10:41 AM   #1
Registered User
2001 XJ Cherokee 
Join Date: May 2012
Location: Dearborn, Michigan
Posts: 2
Rough Idle, Vibration at Highway Speed

I have a 2001 Jeep Cherokee Sport that is having some issues. There is a miss at idle, causing a rough idle. When I get on the highway, once I hit 70MPH I start getting a vibration. If I accelerate up to 75 and back off, as soon as I get out of the throttle the vibration is gone, until I get on the throttle again.

Last year, I had the Intake system cleaned, and it ran GREAT after that. I also replaced the plugs. The engine has 125,000 miles on it. I inherited this from my mother, and IIRC she started having the same problem after a trip to Alaska, when they drove through Canada. Her mechanic thought it had something to do with Canadian gas. I tried different grades from 87 to 93 octane and it makes no difference.

The engine is stock with the exception of a K&N Cold Air intake and filter. The suspension is all new (shocks, leaf springs, bearings) and the tires are new Michelin LTX Touring tires. I don't think this is suspension related because when I back off the gas the vibration stops, so it seems that it is related to the engine load.

I am still looking through my mothers paperwork to find out what maintenance has been done on it. Any suggestions on this problem are welcome!

Michael8it is offline   Reply With Quote Quick reply to this message

rough idle , vibration on acceleration , vibrations

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