JDM ECU vs USDM ECU

F

fussellbug

New member
It's best to use the ECU and harness that were meant for the engine you have. ie: JDM engine with JDM harness and ECU

It is possible to use any 2nd Gen 3S-GTE ECU with any 2nd Gen engine but there are differences in the sensors/wiring/ECU pinouts between JDM and USDM that make it easiest to use the combination that was originally put together by Toyota.

3S-GTE ECU pinouts: http://www.ts-ogn.no/files/3sgte-ecu-pinout.htm
 
underscore

underscore

Well-known member
USDM ECU on a JDM motor would maybe lose you a couple HP, but it might be better for the car if you have to run lower grade fuel.
 
C

celigts

New member
I just started runnin 94 now cuz husky here has 12cents off 94octane on Fridays! But have been running 92 since the swap
 
underscore

underscore

Well-known member
I run 94 all day erry day, since after conversion I think the US equivalent to the JDM gas the JDM ECU wants is 95 or something.
 
C

celigts

New member
Close enough then lol. Wouldn't cause any seriouse damage would it. Like cause rings to go or headgasket to blow ;)
 
S

streetceli88

New member
yea i been running 93 octane hear in NY and shes been running fine, dont even know if ill bother swappin the ECUs out.
Unless some has hands on expierence witha noticable increase in power??
 
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