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Cefiro Loom Help...

Simon-S14
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Simon-S14 Grand Master

Simon-S14

Posted
Posted

Have had huge issues with my RB20det lately, probs are, ignition cutting out at various points in the rev range (not a miss fire like a plug or coilpack would do, but rather a total ignition cut of all 6 cylns) Some times the problem is only while drifting through corners and not in a straight line.. but a couple of times it has happened while on fullboost in 3-4th gear in a straight line and the ignition will cut out, come back, cut out quite repetively.

Now while this is happening, the Tacho also dies... so to me it indicates a loose wire, or a problem somewhere in the wiring of the ignition system. This resulted in me pulling my loom out.. have a look at it and tell me if all the electrical taping in black is factory or not? I know the red tape looks to be non factory...

1003708vs2.jpg

1003708hk0.jpg

the loom has been pretty molested, with none of the wires soldered, just crimped together..

heres another pic

1003709ph8.jpg

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https://www.sau.com.au/forums/topic/127237-cefiro-loom-help/
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A31cefiro Community Regular

A31cefiro

Posted
Posted

like we talked about earlier, you can shotgun my loom when i pull the engine out as i have a 26 loom.

a bit of useless information, on the fuel rail the loom connects to 4 out of 6 injectors and the other 2 connect to the fuel rail loom, compared to the first 3 being connected to the loom and the last 3 being connected to the rail loom on a 32. made it a bastard to take out my fuel rail :action-smiley-069:

Ceffy_SA Collaborator

Ceffy_SA

Posted
Posted

Hey Simon, do you know if you have a Cefiro/Laurel version of the RB20 or has your RB20 been taken out of a skyline (R32 ect)?

I have the Cefiro (earlier) version of the RB20 which has different AFM, coilpacks, ignitor box, ECU, loom ect ect.

Simon-S14 Grand Master

Simon-S14

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  • Author
Posted

Im pretty sure its a factory cefiro RB20det (no bov in crossover pipe, and rb20det on the buildplate, also a factory manual)

Dont tell me all the parts are different?! Coilpacks cant be, as i have 4 CA18 coilpacks and 2 RB20 ones in there atm, 9ignitor loolks the same but im not sure about the rest.

Phil: Rb rails are always a PITA to get out, likewise with a CA, SR's only nissan engine where you can do it in 10 mins... like a 4age :wave:

CEF33Y Experienced

CEF33Y

Posted
Posted

Yep genuine cefiro rb20dets have most sensors, ignitor, coil pack different to a r32. in fact i've found the ceffy's loom/igniter/coilpacks/airflow meter are same as r31. r31has a 128 bit ecu, r32 has 256.

Coils packs, while still having 3 pins, have the pins facing the opposite way to the r32 coil packs, hard to explain on here, but i've got no idea how you fit the ca (same as r31, and ceffy) coil packs and the r32 ones on the same loom.

sorry to sidetrack simon, doesn't really fix your miss, just a bit of info.

i'd say its a break in a wire somewhere, like you said.

good luck finding it

BenA31 Experienced

BenA31

Posted
Posted (edited)
mines a cefiro RB20DET, and im having alot of trouble now with an AFM i just wired up (from a 32) and a stock computer (from a 32). could these be swapped for 31 AFM/Computer?

i believe you also need swap the ignitor module aswel as the firing order is different or something a rather....let me know if you do get the r32 cpu and AFM working on the cefiro motor and loom, as ill do the same when i cbf getting around to it.

Edited by skypy12

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