When I drive my car sometimes I feel this small vibration coming from under the car especially when I accelerate, but when I have passengers I can feel it alot more especially when I accelerate while driving.It feels like if something is hitting against each other.Any suggestions?

 

I also feel the vibration at the gas pedal at low speeds and it goes away at high speeds like another member mentioned in an earlier thread, other members recommended checking the driveshaft.Could that be a start?

 

What's the year, model, engine, tranny type and any major mods on the car?

Add a "signature" with this info so people will have enough info to allow them to answer your questions more accurately.

 

It's a 1994 Pontiac Formula A4, its got an exhaust,K&N CAI,1LE elbow,airfoil,CC 1.5 RR's, and midlength headers.

 

Could be a weak tranny mount, worn U-joints, bent torque arm causing pinion shaft misalignment.