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Old 04-05-2007
tyb9886's Avatar
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Truck shakes

I have a 2002 Ranger 3.0 liter flex fuel with an automatic transmission and 79,000 miles. Recently my truck has started shaking. It shakes most of the time when I crank it up and even worse when the air is on and once the rpm's rise up it goes away until I get on a hill and it's pulling low rpm's and when the transmission shifts down on the hill and pulls higher rpm's the shake goes away. I was just wondering if anyone might know what's causing this?
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Old 04-05-2007
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Check your spark plugs, one cylinder may not be firing. I had similar problems and that was my problem.

-Levino
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Old 04-06-2007
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mine has been doing that too. i have a 99 3.0 flex fuel, with 120k. going up the start of a steep hill(before the auto tranny decides to drop a gear) it will shake around like 1500 rpm's it hasnt really bothered me until ty has brought it up.

any suggestions as to what it could be.

thnx
mike
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Old 04-06-2007
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could be the torque converter, or it could be time for a tuneup.

if its shaking at idle and when you rev it, my guess is you need a tuneup.
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Old 04-06-2007
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I agree with you guys. I would change plugs also. My truck was running like crap and last Sat. I replaced plugs. 3rd set counting originals.Plugs had 40k onthem -Autolite double platnum. What a diff. You don't notice over time how performance starts to degrade.
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Old 04-06-2007
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i recently just did plugs about 6k miles ago, along with the fuel filter.


mike
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