No fuel pump on s13 sr ECU!!!! - Zilvia.net Forums | Nissan 240SX (Silvia) and Z (Fairlady) Car Forum

atxzenki · 04-05-2012, 09:45 PM

well, I have an ECU that comes on, but it doesn't prime the fuel pump.. Is this a sign of a bad ECU, or do you think it is something that can be fixed? I tried another ECU and the car started right up..

Any help is greatly appreciated!!

Pro ViZIon · 04-05-2012, 10:52 PM

You probably answered your own question.

atxzenki · 04-06-2012, 03:46 PM

Well I wasn't sure if there was a simple fix for that ecu, like maybe it was in diagnostic mode or something..

GroundPerformance · 04-06-2012, 04:21 PM

I've had an ECU like that before. Replacing the ECU would be the best solution however you can still make it work by taking the siginal for FUEL PUMP relay from another IGN ON source.

GhostlyCoupe · 04-08-2012, 03:12 AM

Take the ECU out and look at the LED on it.

Is the red LED stuck on? If so this mode will cause the fuel pump not to prime.

cotbu · 04-08-2012, 04:38 AM

Quote:

Originally Posted by GhostlyCoupe

Take the ECU out and look at the LED on it.

Is the red LED stuck on? If so this mode will cause the fuel pump not to prime.

What mode would this be?

I agree with GroundPerformance, you probably have a burnt trace for pin 104 or a frozen relay. If you jump the relay and the pump powers on we know the pump and the wiring to it is good. There should be other relays used or unused in the bay to test the relay on or swap. This would rule out the relay. do a continuity test on the fuel pump relay trigger wire to pin 104. If the problem still exists? It's the ecu. you could always swap ecu's too, but nothing beats a DIY'er

04-05-2012, 09:45 PM	#1
atxzenki Leaky Injector Join Date: Apr 2008 Location: Austin, TX Posts: 109 Trader Rating: (5) Feedback Score: 5 reviews	No fuel pump on s13 sr ECU!!!! well, I have an ECU that comes on, but it doesn't prime the fuel pump.. Is this a sign of a bad ECU, or do you think it is something that can be fixed? I tried another ECU and the car started right up.. Any help is greatly appreciated!!

04-05-2012, 10:52 PM	#2
Pro ViZIon Zilvia Junkie Join Date: Dec 2008 Location: Las Vegas, NV Age: 31 Posts: 415 Trader Rating: (0) Feedback Score: 0 reviews	You probably answered your own question. __________________ 1990 Nissan 240SX w/KA24DE - New project 1984 Mazda RX-7 GSL-SE 13B

04-06-2012, 04:21 PM	#4
GroundPerformance Zilvia FREAK! Join Date: Oct 2008 Location: Socal Posts: 1,477 Trader Rating: (44) Feedback Score: 44 reviews	I've had an ECU like that before. Replacing the ECU would be the best solution however you can still make it work by taking the siginal for FUEL PUMP relay from another IGN ON source. __________________ SoCal KA24DET/KA24ET Owners << Join the FB Group >>

04-08-2012, 03:12 AM	#5
GhostlyCoupe Zilvia Member Join Date: Dec 2011 Location: Phoenix, AZ Age: 38 Posts: 221 Trader Rating: (1) Feedback Score: 1 reviews	Take the ECU out and look at the LED on it. Is the red LED stuck on? If so this mode will cause the fuel pump not to prime. __________________

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04-06-2012, 03:46 PM	#3
atxzenki Leaky Injector Join Date: Apr 2008 Location: Austin, TX Posts: 109 Trader Rating: (5) Feedback Score: 5 reviews	Well I wasn't sure if there was a simple fix for that ecu, like maybe it was in diagnostic mode or something..