Ok i have a 99 gt it has a good amount of stuff done to it but when i drive down the road i can feel the car like jump and jerk like it is missing but at idle there is no miss and when i get on it it is fine, any one have any idea what it is

 

I'm thinking due to the overkill in detail you wont get many responses.

 

is it an auto or 5 spd

 

Any check engine lights on yet? Changed your plugs lately? Could also be a bad COP. Need some more detail here.

 

Sorry guys, it is a 5speed, no dash lights. It has pp polished intake manifold, steeda underdrive pulleys, steeda cold air intake, steeda timeing adj set at 14degrees, magnaflow xpipe and cat back, king cobra clutch and steeda drag spring and camber caster plates, i just change the plugs about 1k miles ago.

 

Any suggestions

 

mine did that and it was a cop wasnt doing it enough to make the light come on but it ran like **** at just crusing speed.

 

Has it ben going on long? I had something similar to that happen to me a few months back. It was only at low speeds that it would feel like it was jerking or shuttering. I ran the tank down to Empty and filled up with 93 a few times and it went away. Could be bad gas or a clogged fuel filter?

 

it has been a few months but i never payd much attention to it bc i only drive my car once a week maybe, it has a brand new fuel filter and it only get shell 93oct gas always