Rb25De Issues

[goncalves37]

Hi all,

I have just swapped an RB20DE out for an RB25DE in my R34 and when driving the engine cuts out at 4000rpm in 2nd gear and then at 3500rpm in 3rd and so on. I am not really mechanical saavy and would just like to know if anyone else has had this problem and if so id go about fixing it.

cheers.

[Ben C34]

You've you got the speedo hooked up to the ecu?

If it doesn't get a speed signal it will cut as you have described.

And what ecu are you using? I hope it's the 25 ecu.....

Edited August 24, 2014 by Ben C34

[goncalves37]

Yeah. Would having the RB25DE ecu hooked up to the RB20 harness and loom cause this?

[Ben C34]

Yeah. Would having the RB25DE ecu hooked up to the RB20 harness and loom cause this?

Maybe. Depends how interchangeable they are. Have you looked at and compared the pinouts on the ecus or just plugged it in and hoped for the best?