when neve i slow down to stop the car skips and shakes. when i accelerate it skips and shakes. this happens on normal stopping conditions. i put a new iac valve when i first put it on it ran great no shaking smooth idle quicker accel. and performance. i turn it off and turn it back on and it goes back to the way it was before. i even cleaned the throttle body and put new gaskets on it. whats the deal?

 

anyone?

 

???

 

So it is your engine that is running rough. Not your shocks or struts, or something like that.

 

it the engine

 

Sounds like a miss or misfire. Plugs, wires, cap and rotor?

 

no thats not it

 

Any codes?

 

it could be a number of things, timing, maf sensor unplugged maybe? give more details

 

how are u sure?

i was having very simular problems with my car. missing throughout the driving speed range. and i traced it down to two plug wires that had spark arching ot the block..

 

Check fuel pressure, pressure drop under load, and don't overlook the possibility of dirty injectors.