what is this ecu code??

Discuss the RB20, RB25 and RB26 series engines.
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USMCgetsome
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Joined: Wed Apr 14, 2004 7:38 pm
Car: OWN S13.5 RB25DET/2003 G35
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in diagnostic mode on the red led on ecu i see

3 long pulse4 short

5 long 4 short

Not sure if it's mode 1 or mode 2


goofynick6
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Joined: Thu Feb 05, 2004 9:58 am
Car: 1995 S14.5 RB20DET

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34 is knock sensor54 is auto transmission system problem

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USMCgetsome
Posts: 2030
Joined: Wed Apr 14, 2004 7:38 pm
Car: OWN S13.5 RB25DET/2003 G35
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hey nick i tried my setup with another ecu and it's doing the same crap. When at normal operating temp i can see my original ecu has unstable timing and this new one it is stable but it still feels wrong. i'm off to unplug the sacf2 and see how it does. Also waiting on my new clutch to see how that's gonna do as well. i have both knock sensors plugged in and my ecu isn't an auto.

goofynick6
Posts: 1216
Joined: Thu Feb 05, 2004 9:58 am
Car: 1995 S14.5 RB20DET

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Hey, when it rains it pours!

I found that after switching ecu's I'm still having the same troubles too! Mine only acts up after I've made any kind of boost; after boosting it runs rough and sputters, etc.

It runs like a bov that is stuck open and vented to atmosphere; however mine is not vented out and I'd think that wouldn't be a problem..but after a while it will idle normal again, but once you hit boost then it spits and sputters and idles at a 17:1 a/f ratio or worse...grrrrrrrrrr

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USMCgetsome
Posts: 2030
Joined: Wed Apr 14, 2004 7:38 pm
Car: OWN S13.5 RB25DET/2003 G35
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i think it's a faulty air temp sensor or water temp sensor. I don't think the knock is bad and also this new ecu has stablized my timing issue even at normal warm temp. The idle is stable with this ecu. I can hear the injectors clicking alot more with this one.


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