I have a turbo s2000, aem cpu
I have a bad coil and my question is can i just replace it with a denso coil i can get off amazon and leave the other 3 oem or must i replace it with a new oem coil, so that the tuning doesn't change?

Thanks

 

you can change just the one that shitted out and you'll be fine...double check the other coils though just to be on the safe side

 

I'd change them all for piece of mind(if one dies how long til they all die), but you can just change one no problem

 

anyone know how to test a coil, other than the swap and scan method

 

Swap & scan, look for misfire counts.

 

Which question are you answering?

 

What he said.