hey guys need help i bought an mr2 i sold to my mate and it has gen ecu in it with gen 2 motor so as you can imagine its all fun and games desperately need help can i plug a piggy back ecu and re tune it i am trying not put another engine in there if its possible if needed can come look at the car,
just frustrating and unsure where to start ???
any help greatly appreciated
 

What year is the vehicle? Does it have the correct loom to suit the ecu or is that what is wrong.

If you have a rev1 ecu on a rev2 loom then either buy a conversion harness or repin the plugs to suit the ecu.

im pretty sure that it is rev 1 the model is sw20 1991 na
okay thankyou so try the loom first?
 cheers

What's the part number on that ECU you have?

So if its a rev 1, does it have a rev 1 ecu and loom? All rev1/2 sw20 came with a gen2 3s engine.

this is the ecu but the engine isnt the same is there a way i can figure out the 2?
 

I can check my old ecu tonight and compare for you

cheers thankyou
 

What year/gen engine do you have?