bucking problem

[shotgun]

its starting to annoy me at first i thought it was my fuel filter changed that problem still there fuel pump is new not that but i had motor rebuilt. i know what was i thinking to rebuild a 2.5. none the less i did any way i get a bucking like its suffering from fuel i changed the fuel cap cause tank needs to be under preassure for fuel flow nothing leaks there. but the bucking is when im driving only not when im ideling or if i rev it up but if i hold the tack at 2500 rpm then i seem to have a slight miss but there is no adjustments on the distributer its fixed :x could that be my problem and how in the hell do i fix it......

 

[Bounty__Hunter]

I had a similar problem and it was a bad crank position sensor or a bad connection to the crank position sensor.

 

[shotgun]

Wheres that located? Is it easy to reach?

 

[Bounty__Hunter]

It's on the bellhousing just behind the intake manifold, reaching back from the driver's side of the engine.