SUPERMAN2662

I have a 07 scion tc thats has been turboed ...... Has a cyl 2 and some time 1 missfire ......when i get over 4500 rmp it starts to miss real bad and i have to let off and let the cel stop flashing then i can give gas again ....... Have changed plugs and coils .... Compression is from 1-4 155-160-158-155 any idea what the problem is?

bbsciontc

What are you using to tune? AEM FIC?

SUPERMAN2662

just got the car last week found out yesterday that it does have. Aem fic ... Got the software downloaded but not sure were to start...

bbsciontc

It's either the tune, or it is picking up noise on the crank/cam singals. Search these forums for the AEM FIC setup thread. It should tell you everything you need to know, including the "resistor mod" that might be required if it's not already done.

SUPERMAN2662

I think it is the tune I downloaded the software but got lost I'm trying to figure out how to work it There's No One near me that does tuning

xile6

Yea it could be the install of the tuning hardware (aem fic)
Or its the tune itself. You might wanna check around some more and see if you can find someone not to far from you to take a lot at it.
It wouldnt be safe to keep driving it without knowing what the problem is. could burn out the motor.