Mustang w/ a miss

[racer5.0stang]

I have a 95 GT and I believe it has some sort of a miss. At idle, it acts like it has a cam and going down the road at any speed and any gear it hesitates and shakes back and forth. It doesn't do it all the time but it does it enough. I have replaced the plugs and wires, rotor button and cap, and coil. Any suggestions will be appreciated.

 

[Green 94 5.0]

have you checked your timing? if that isnt it, you might want to check your fuel filter as well. it sounds like the engine is starving for fuel.

 

[racer5.0stang]

I know the car has an adjustable fuel reg. but i don't know where it is set at. I put long tubes on the car and I heard that that changes the pressure (makes the car run rich). Timing could be an issue, I had it checked but I was running 89 octane but know I am running 93. I'll check out those two options. Thanks

 

[Green 94 5.0]

I know the car has an adjustable fuel reg. but i don't know where it is set at. I put long tubes on the car and I heard that that changes the pressure (makes the car run rich). Timing could be an issue, I had it checked but I was running 89 octane but know I am running 93. I'll check out those two options. Thanks

the reason the car runs that way with longtubes is because of the o2 sensors are farther downstream and cool down from the temperature they are supposed to stay at.

 

[Jerry Leaming]

Check for any vacuum leaks also.
Or a stuck PCV valve?