How to tell what ecu you have?
 

Hi I had two spare ecu's come with the p1.. I know one is a standard p1 ecu as it says on outside,but the other one is basically a circuit board with 3 port holes in,so not sure what ecu it is? Anyway of checking??

any pictures? not sure what you mean by portholes - like cut into the casing?

Screw the covers off and post pics of what you find on the inside.

Think he means it's a 3 plug ECU maybe, I do like port holes though lol