i recently bought a theft recoved s2000... since it didnt have an ecu i decided to go with a jdm ecu... yesterday i attempted to start the car for the first time. i would turn on the switch and the fuel pump wouldnt go on. so i went through the routine of how to check the fuel pump... everything works. except it still does not turn on. when i open the ignition switch.

i started the fuel pump manually... then i tried starting the car... still nothing...what i think is happening is the ecu is not working...

has anybody done a jdm ecu swap into their cars? my car is an ap1. is it a direct drop in?

 

car sparks... forgot to add that on.

 

I've tried mixing and matching ECU's on my car ( australian loom),

The US and AUS ecu's work fine. The JDM ones only work with a JDM engine loom. Not sure why, but if you got a wiring diagram you should be able to spot the difference. Its probably something simple.

BTW. If I swapped out a working ECU for a JDM and tried starting the car it would run for a few seconds on the residual fuel pressure then stall.

If you got your car cheap did that leave enough bikkies for an AEM?

 

The JDM PCM's fuel pump control is different. You need a US spec PCM or source JDM wiring diagrams to make it work.

Most of the JDM PCM's will have a speed limiter the US spec PCM doesn't have.

 

i turned the fuel pump on manually but the injectors still would not go on...

 

Same thing when I bought my JDM ecu.

Did a search and didn't find much other than JDM ecus don't have the immobilizer. I thought it'd work, but damn...

 

Do the injectors have 12 volts on one of the two pins when you are cranking? I think you will find that the injector supply is also switched by the main PCM relay.

 

yeah i just gave up and bought an ecu and the imobilizer key with it... ill just have it reprogrammed. but thanks for all the input.