[xcool22]

just put in new fuel filter & spark plugs and wires.pcv.coolant temperature sensor.
about weekago i got gas from shellgas i found out
water in gas so put some water remove & fuel injectors clean . now i have bucking.
i did have code have P0133 .put in new oxygen sensor .did not help.thanks.


1999 Ford Taurus 6 cyl 131789 miles

 

[shoz123]

Either a plugged fuel injector or you still have water.

 

[xcool22]

thanks alot..

 

[MrBooMY]

He answered your question. There is no need to get smart about it. Those are the two most likely causes of bucking. I will add another that is less likely, but happened to me. The transmission mount busted in two, and would cause bucking feeling mainly on decel to a stop. The mount didn't LOOK bad, but if you held the brake and hit the gas, the motor would jump around. It should only move maybe 2 inches TOPS when you do that with good mounts.

 

[xcool22]

i clean the IAC today & Idle goes up and down, start to bucking