The 2 coolant temp sensors, one 1-wire, one 2-wire, should both be swapped out. Ignore the extra crap on the S14 motors. If there's a plug on the S13 harness, hook it up. It's that simple. You can leave off 1 or 2 of the emissions dealies on the intake manifold. TPS, dizzy, mafs, ignitor, O2, coolant, injectors. That's all the S13 ECU needs for I/O to the engine. The 2nd coolant sensor will drive the gauge in the cluster.

So I just literally told you everything you need to know about this engine swap from the electrical side. What's next; do you need a vacuum hose tutorial?

 

So I just literally told you everything you need to know about this engine swap from the electrical side. What's next; do you need a vacuum hose tutorial?[/quote]

hope not. if it doesnt start ill try and talk to you... thanks

 

Pm if u need help aron

 

shall do thanks

 

do u have to use an s13 ecu on a 91 engine or can i use a 98 ecu on the 91 engine

 

i tried using a 91 ecu on a 97 did not plug in

 

Your ECU should match your harness. S13 ECU on S13 harness. S14 ECU on S14 harness. SOHC ECU, go away.

 

ok i know that but will an s14 ecu and wireharness work on a 91 ka24de?

 

Yes, if you use the S14 distributer. The real problem is when you mismatch harnesses and chassis. That's when you run into a wiring nightmare.

If you're doing ANY wiring on a KA motor swap, UR DOIN IT WRONG!

 

o ok