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Rb20det Injector / Ecu Problems

R32_Damo

By R32_Damo,
in Engines & Forced Induction

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R32_Damo Community Regular

R32_Damo

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Hi,

Ive been having problems with my RB20DET for awhile now just took it 2 a performanceshop and they told me its runnin too rich because miss matchd injectors to ECU. The ECU is giving the injectors to many millisecs. They swaped my ECU for a RB25 ECU which stopped it running rich but it had a lean spot at 2k but on boost it was flyn.

I think i have worked out the the injectors are Red Top RB20 Low impedance and te ECU is Silver Top high impedance. (ECU had R32 skyline type M writing on it)

How come the RB25 comp made car betta i thought RB25s ad high impedance injectors also???

I have installed a Resistor which didnt do anything still running rich.

Only other thing canthink of is change to Silver top injectors and a new ECU also?

What do you guys think??

Thanks alot for your time, DAMO!!!

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https://www.sau.com.au/forums/topic/142124-rb20det-injector-ecu-problems/
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R32_Damo Community Regular

R32_Damo

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Nar ive got RB20 injectors which i think might be Red op Low impedance and Engine runs rich wit my RB20 ECU The Performance Shop ran my Engin With a RB25 ECU stil using my injectors and it wasnt runnign rich any more.

andylaurel Community Regular

andylaurel

Posted
Posted

this is because the RB25 ECU 'thinks' its pulsing 370 cc injectors whereas its really only pulsing 260cc injectors, so the injector pulse will be shorter (for a given amount of air that passes through the AFM) than the RB20 ECU's injector pulse.

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