rb25det cranks but no fuel signal - Zilvia.net Forums | Nissan 240SX (Silvia) and Z (Fairlady) Car Forum

24000rpm · 08-19-2015, 01:35 PM

I swapped in a rb25det into a s14 chassis and today i finally hook up every thing and cranked the engine. it cranks and no fire.

So I checked all wiring and only to find that one of the coilpack is so hot that its shot! replaced that and I still found all coilpacks are pretty hot!

anyway, i used some bulbs to test if the fuel lines are working, guess what,
the fuel wire from ECU isn't giving any signal.

what can caused this? can anyone give some directions as where I should be looking at?

xchaosx · 09-12-2015, 06:37 AM

Check continuity to ground from the fuel pump wire upon key on. The ecu grounds this wire, so it won't show any voltage coming from the ecu, only continuity to ground when active.

If you're talking about the injector wire, the dash should be supplying voltage to that wire.

08-19-2015, 01:35 PM	#1
24000rpm Join Date: Jul 2015 Location: california Posts: 3 Trader Rating: (0) Feedback Score: 0 reviews	rb25det cranks but no fuel signal I swapped in a rb25det into a s14 chassis and today i finally hook up every thing and cranked the engine. it cranks and no fire. So I checked all wiring and only to find that one of the coilpack is so hot that its shot! replaced that and I still found all coilpacks are pretty hot! anyway, i used some bulbs to test if the fuel lines are working, guess what, the fuel wire from ECU isn't giving any signal. what can caused this? can anyone give some directions as where I should be looking at?

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09-12-2015, 06:37 AM	#2
xchaosx Leaky Injector Join Date: Aug 2003 Location: Bay area, CA Posts: 114 Trader Rating: (3) Feedback Score: 3 reviews	Check continuity to ground from the fuel pump wire upon key on. The ecu grounds this wire, so it won't show any voltage coming from the ecu, only continuity to ground when active. If you're talking about the injector wire, the dash should be supplying voltage to that wire.