98 cobra shaking at low RPMS

[pauliac]

anytime i'm at low RPMs (between 1000-2000) my cobra shakes and doesn't really accelerate as fast as it should. after about 2000 it's fine though, no shaking. I was going to check the plugs, but I wanted to know what else i should check for.

Also, my car idles at slightly higher than 1000 rpm. This seems a little high to me, so I was wondering if that's normal. that may or may not be related to the shaking.

 

[Gearbanger 101]

Does it shake in gear, or at idle...or both? Could be a lot of things. Bad plugs, wires, coil pack, dirty injector, worn out crank shaft dampener, etc.

High idle might be a dirty T/B or a vacuum leak?

 

[pauliac]

Does it shake in gear, or at idle...or both? Could be a lot of things. Bad plugs, wires, coil pack, dirty injector, worn out crank shaft dampener, etc.

High idle might be a dirty T/B or a vacuum leak?

it just shakes in gear, for example, if i'm cruising at about 50MPH in 5th gear, and i try to accelerate to 65, it will do the whole shaking bit.

I can probably check the throttle body, but what's a vacuum leak?

 

[Mike97gt]

it just shakes in gear, for example, if i'm cruising at about 50MPH in 5th gear, and i try to accelerate to 65, it will do the whole shaking bit.

I can probably check the throttle body, but what's a vacuum leak?

most likely it's a ignition related misfire.. plugs and wires are the most common causes of this on your car.. also check the coils for small cracks, a lot of times when they go bad they crack.