light throttle bucking problem
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New User
Joined: Jan 2008
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light throttle bucking problem
Hey everyone,
Brand new to the forum. I need help diagnosing a problem with my 2000 Excursion v10. A vibration started about 3 months ago and I've been replacing parts since trying to solve this problem. Upon acceleration, light throttle, and mild braking the excursion vibrates extensively. So far I have replaced all four rotors and pads, shocks, steering components, had a diagnostic test done, replaced all spark plugs and two coil packs, and u-joints. The vibration has gotten worse and the engine now seems to run rougher. Please help.
Brand new to the forum. I need help diagnosing a problem with my 2000 Excursion v10. A vibration started about 3 months ago and I've been replacing parts since trying to solve this problem. Upon acceleration, light throttle, and mild braking the excursion vibrates extensively. So far I have replaced all four rotors and pads, shocks, steering components, had a diagnostic test done, replaced all spark plugs and two coil packs, and u-joints. The vibration has gotten worse and the engine now seems to run rougher. Please help.
Sit. Stay.
Joined: Oct 2001
Posts: 18,308
Likes: 20
From: Washington State
I would replace the other 8 coil packs and make sure the boots on ALL of them are new.
However, since your truck vibrates at both acceleration and DEcelleration then I'd look further into tire balance, wheel run-out issues & other rotating driveline components.
Might wanna inspect all the engine and transmission mounts, too.
Where do you feel the vibration? Steering wheel etc?
However, since your truck vibrates at both acceleration and DEcelleration then I'd look further into tire balance, wheel run-out issues & other rotating driveline components.
Might wanna inspect all the engine and transmission mounts, too.
Where do you feel the vibration? Steering wheel etc?
Junior User
Joined: May 2005
Posts: 76
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A bad catalytic converter can give you a problem on light acceleration. Do you smell sulfer out back? It could be two problems you are having. Did you try shifting into neutral on deceleration to see if you have the vibration?
Senior User
Joined: Nov 2006
Posts: 156
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From: Troy, Ohio
what about sitting in the driveway revving engine? Only when the ex moves? or can you make it do it?
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New User
Joined: Jan 2008
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cashed in a favor from the local ford dealer and found out #1,2,9 COP were bad. (those things aren't cheap). decided to have all of them replaced since the vehicle has 130,000 miles.
Thanks for all the help and suggestions. Now I know where to go to find answers.
Thanks for all the help and suggestions. Now I know where to go to find answers.
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