Low impedance ECM, how can you tell?

[67turboCamaro]

I just bought one and was wondering how to tell for sure.

 

[Craig Smith]

If this is a FAST ECU, it will handle high or low impedance injectors.

 

[KendallF]

Originally posted by 67turboCamaro
I just bought one and was wondering how to tell for sure.

If you're talking a stock ECM that's been modifed, you'll have to take the case off.

Look at the heat sink on the side where the drivers are mounted...there should be 6 drivers there with 5 pins, 3 of the pins soldered into the board and two bent up with a bunch of messy looking resistors and wiring globbed onto the board attached to 'em. At least that's how most people install the drivers....stock ECMs have 3 pin transistors in those locations.

 

[67turboCamaro]

Thanks for the info!!

 

[Turbo1dr]

I believe one of my friends got screwed by a TB.com member. He bought one and I had a look inside. Everything looks to be untouched and unmodified. I drove to Bowling Green with that (unmodified) ECM!