Rb20det Injector / Ecu Problems

[R32_Damo]

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!!!

[paulr33]

some english would help, but if you are using rb20 injectors and an rb25 injectors, then yes it wont match. rb25 has larger injectors, hence the not matching part.

[WazR32GTSt]

the rb20 engine ran with the rb25 ecu??

surely all the inputs aren't the same...

[R32_Damo]

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]

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.