Help Troubleshoot Bucking
 

I searched the forum for jerking or bucking during deceleration and the results are all over the place.

Can someone help me put together a plan on how to trouble the issue?

While decelerating in gear at both low and highspeeds the rear end starts to jerk and buck. It does not stop until I either accelrate or put the clutch it. It happens when I am at 65 mph and braking.

My search results stated it could be TPS, Dashpot, Differential Mount, etc.

I definitely feels like a drivetrain issue like the rear end or transmission needs to be braced to keep it from jerking back and forth. I am really posing the question because I dont understand how a TPS or Dashpot could cause this issue.

Thanks for the help in advance,

Jon

You have a microtech, do you have the decel fuel cut set up?

tps could easily cause all types of bucking and jerking. just be sure its in spec

Thanks for the microtech advise on the decel fuel setup. I will also search on how to diagnose a TPS. Car is in the body shop so I will post update in a couple days.

+1 - Adjusting the TPS 100% fixed that issue in my FD.

Diff bushings, motor mounts, pillow balls. As said above, check your deccel fuel cut too. Should be below 1400 in most cases.

Microtech is a vacuum set point actuated decel fuel cut.