why is my motor shaking?

[ZarnAutomotive]

check your TPS

 

[pomofro]

tps is fine. the wires, cap, rotor, coil is new. i checked the wires over and over again and the spark gap. i have codes 12, 21, 23, 42, 33, and 13 with the engine running if that says anything. nothing koeo

 

[StangBangRicers]

Clean out your IAC (idle air control)/ air bypass valve and also the throttlebody around the butterfly...

Should clear up atleast 2 of those codes.

 

[01TrueBlueCobra]

A friend of mines had the same problem with his 91LX. Turns out the Mass Air Meter was going bad.When he replaced it the engine stopped shaking

 

[noslow5_0]

tps is fine. the wires, cap, rotor, coil is new. i checked the wires over and over again and the spark gap. i have codes 12, 21, 23, 42, 33, and 13 with the engine running if that says anything. nothing koeo

mine shakes like crazy too. when i hit the throttle it smooths out..... New motor and tranny mounts too.... Ive just learned to live with it. Its kinda cool at stop lights i think cause with my e cam and the car shakin a little it'll scare all the little ricers lol!!!!!

 

[GMstomper]

One other thing to think about....you may have a vacuum leak causing your idle drop and your engine to try stalling