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Old 07-27-2010, 04:41 PM
Stemo99 Stemo99 is offline
Learning to use the forums
Join Date: Jul 2010
Posts: 1
Default Bucks on highway when ac is on

My 2000 3.0 L ranger runs great at highway speeds but when ac is turned on it bucks constantly. The ac condenser has recently been replaced and it blows ice cold air but bucks and jerks at high speed. Not noticeable when driving around town. It did the same bucking before the condenser was replaced now to think of it so that shouldn't be the cause. Without ac on runs great at all speeds. I changed the spark plugs, no difference. Anyone got a cure?? Thanks in advance

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Old 08-01-2010, 01:39 AM
bigr101 bigr101 is offline
trucker man
Join Date: May 2010
Posts: 8
Default Re: Bucks on highway when ac is on

same thing happened to me the other day while driving on I-25 for about an hour, first time it did it and i thought at first i was having clutch problems, but i was told that if you turn down the fan speed that usually helps, but im not 100% positive, wasnt able to try it out on the way home since it was night and cool enough to have the vent on.
1998 Ford Ranger XLT 4x4 off road, 3.0 Vulcan, 5spd manual, stepside, custom headache rack with lights, 164,000 miles, dark green
1999 Ford Explorer, 4.0 cologne, automatic, XLT, 92,000 miles, burgundy, 4x4
2005 Chevy Colorado, 3.5 Vortec, automatic, 2x4, 21,000 miles, white
1977 Chevy K30 Crew Cab Dually(soon to have), with 6.5 diesel, 5spd NV4500
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