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Rb25 With Rb20 Loom And Rb20 Ecu Wont Run?

aussy-boyz

By aussy-boyz,
in Engines & Forced Induction

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aussy-boyz Community Regular

aussy-boyz

Posted
Posted

Hey guys we have a rb25 running a rb20 loom with rb20 ecu. Car fires at start then just wont rev and dies. but when we plug rb25 computer it runs fine. then pluged rb20 computer into r33 and runs fine. so both computers are ok, Reason for wanting to use rb20 computer is for remap purposes. Also has 550cc injectors. Any ideas to try would be great, cheers

Moodles2 Grand Master

Moodles2

Posted
Posted

Injector sizes are different that's the obvious part, but the injector latency will be completely different. The aftermarket injector having a completely different lag time vs the factory injector, those 550cc's might be injecting too early or too late than the factory ECU is expecting which will most likely explain why it can't idle.

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