Changed out the spark plugs, and it's still missing!! anyone have any idea why?

 

Change the wires, and check the ignition coils while you're in there.

-s-

 

Is the car stock? stock boost?

 

Maybe the fuel pump or fuel pump relay.

 

they said it could be the tps

 

you need to be more specific about what you have..

 

stock boost, rotary power usa street ported with 3mm seals, power FC, stock twins, blitz fmic, hks intake...

 

Is it gear specific or at all gear? what rpm and does it alway happen at certain rpm? Is you pfc tuned? who tuned it? ignition amp?

 

call Jeff at Rotary Power I am sure he can fix it. you may want to try the HKS twin power ignition amp. some say it can clear up this problem.

 

I had ignition break up during higher RPMs. When I checked the ignition harness it was in awful shape...very crispy and brittle. It appeared the rear trailing plug was rarley firing...not sure about the others. After replacing the harness the break up went away.