alright so i bought an em1 and the guy i bought it from gave me an ecu with launch control and the check engine light is a shift light. does anybody know or have the diagram to hook it up?

 

To hook up what? Have you LOOKED at the ECU? 3 plugs. Don't know what you need launch control for on a stock EM1.

 

well considering i dont know what the hell im doing...the check engine light is stays on with the ecu it has in it now but when the p28 is hooked up it goes off but the tach doesnt work. i gotta figure out how to rewire it, therefore i need the diagram.

 

doesnt go off, i shift light. Its not completely stock

 

If you cannot look at the ECU he gave you , then look at how the current ECU is hooked up to figure it out then I don't know what to tell you. It's three plugs!

 

Nothing wrong with the tach if it works with the old ECU. It doesn't need to be rewired. What exactly are you trying to do?

 

Read the rules sticky. You are failing on multiple counts.