Jerking while accelerating and decelerating

[Emerald93MTX]

Just the other day I replaced my broken front motor mount with a SHOnut reinforced one. A couple of weeks ago, I installed Al SFBs and Moog TPR front endlinks. I'm trying to figure out where this jerking is coming from and why I still haven't gotten rid of it

Some ideas that I have are that the rear or tranny mounts are also gone, though I did the shotimes test and the engine doesn't move more than half an inch in either direction. The other thing that my mechanic and I noticed is that the bar that runs from the subframe to the lower control arm (I think) has the red bushings and that on the passenger side, there is some rust near one end of that bar. We think that it might be moving about a half inch or so and causing exposure to rust. I just don't know if that was just from the old mount being shot or if it is still moving. The last thing I can think it could be is something in the tranny, though I don't think (hope not) it is.

Any help would be greatly appreciated.

Paul

 

[masho95]

When does the car **** like that? Every single time you speed up and slow down, or does it happen every now and then?

 

[Emerald93MTX]

Every single time, and I know this topic has been mentioned on this forum before; I did the search, though the conditions are slightly different. Thanks,

Paul

 

[Emerald93MTX]

bump^

 

[masho95]

bump^

Check your TPS with a multimeter, you might have a big flat spot? Check your codes also. Does it happen at all throttle positions?

 

[AutoSHO]

Is this just a jerking when you are going from decelerating to accelerating, or accelerating to decelerating, or does it also do it when you merely change throttle positions (i.e. You were accelerating slowly then romped on it)?

 

[MilTownSHO]

Check your TPS

I would start with that, my red 92 used to do that also, got alot better with the new TPS, but slowly the problem has come back!

 

[Camarok]

I would start with that, my red 92 used to do that also, got alot better with the new TPS, but slowly the problem has come back!

Gotta buy only ford OEM for that..... I got one (although it was twice what I paid than that from an auto store) but the problem hasnt' come back.... yet

 

[Emerald93MTX]

I already bought a new TPS from Advance Auto Parts, and the reading with the multimeter is .92v up to 4.7v. The symptoms are as AutoSHO suggested, when switching from accelerating to decelerating. It doesn't do it when I'm already accelerating then romp on it, which leads me to believe it is something mechanical. Thanks for the suggestions.

Paul