2001 f150 7700 Shaking problem
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2001 f150 7700 Shaking problem
Hi guys, I have a 2001 f150 7700 edition. The truck has 118,000 miles and i've owned it for the past three years, the trucks great and really reliable. I drive the truck every day 50 miles to my college and about two weeks ago my truck started shaking . I had just got off the highway and made it to a stop sign. I then took off and when I hit about 30 miles an hour the truck started shaking but when I hit 40 it stopped. I said whatever and ignored it. now it does it pretty much anytime I go past 30 miles in hour. My tranny shifts good. I checked the fluid and it was normal. smelt it and it didn't smell burnt or anything still pretty red. Some days its worse then others. I need to get this fixed before winter and driving to school everyday doesn't help. Also, no engine lights, tranny lights, no obvious lose parts, tires are good. It only shakes when I give it gas. I let off the gas at 80mph and it doesn't shake at all. Which is why i'm confused. If you guys have any insite it would help a lot. I cant afford to spend much on it because I pay for college so any knowledge would help!
Fleet Mechanic
Joined: Sep 2003
Posts: 1,716
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I suggest using the search on this website, use the Advanced Search, so you can limit the search range to this 1997 - 2003 F150 Forum. And for keyword, use COP or COPs (that's the Coil Over Plug ignition coils).
That may be a good place to start.
That may be a good place to start.
Hotshot
Joined: Jul 2005
Posts: 11,931
Likes: 180
YES.. a bad COP will do just that. Under throttle one cylinder miss fires and you get a small vibration... back off on the throttle and it smooths out. If you have no code that makes it hard... sooner or later you may get a code. Prior to that you need a special code reader to monitor what is going on while driving... or if you have a spare COP, install on one cylinder and test... then move to another, etc... long process if you don't have the code.
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