fuel pump question s13 - Zilvia.net Forums | Nissan 240SX (Silvia) and Z (Fairlady) Car Forum

mcgraneimports · 03-04-2012, 08:47 PM

new to the nissans will the fuel pump turn on without the motor and ecu in the car

KiLLeR2001 · 03-05-2012, 12:32 AM

Not with the standard ignition on switch. In order to kick it on you'd have to jump the fuel pump relay.

tapdeznutz · 03-07-2012, 01:41 PM

what is the flow rate of the stock fuel pump. i was looking and saw that walbro offers a 190 and 255 lph units.

89JDM240sx · 03-07-2012, 02:02 PM

Is there something wrong with the one that's in there now? What motor?

mcgraneimports · 03-08-2012, 05:08 PM

its an sr the motors not in it s13 car it dont turn on when i turn the key it works when i jump the relay

KiLLeR2001 · 03-08-2012, 05:10 PM

Quote:

Originally Posted by mcgraneimports

its an sr the motors not in it s13 car it dont turn on when i turn the key it works when i jump the relay

ECU is not sending the signal to the relay, I had an ECU go bad out of nowhere on me, I thought it was my fuel pump and I replaced it, no change. Finally got a new ECU and everything was better again.

But make sure all the wiring is secure and correct before venturing out to source another ECU.

merijndj · 03-08-2012, 08:49 PM

The ECU certainly does sent the signal to the fuel pump relay.

When you turn the key, the click you hear is the ECCS relay (in other words, you turn the ecu on).
The ECU then 'primes' the fuel system (runs fuel pump for 5 seconds) then stops it.
After that the only time that the fuel pump is running, is when the CAS is turning around.
(CAS - Crankshaft Angle Sensor).

There is a small switch inside the ECU that goes bad sometimes, it is user serviceble IF you can solder very well and know where to look.

03-04-2012, 08:47 PM	#1
mcgraneimports Join Date: Feb 2012 Location: waterloo ny Age: 36 Posts: 15 Trader Rating: (0) Feedback Score: 0 reviews	fuel pump question s13 new to the nissans will the fuel pump turn on without the motor and ecu in the car

03-05-2012, 12:32 AM	#2
KiLLeR2001 Post Whore! Join Date: Jun 2007 Location: オーランドフロリダ Posts: 7,955 Trader Rating: (46) Feedback Score: 46 reviews	Not with the standard ignition on switch. In order to kick it on you'd have to jump the fuel pump relay. __________________

03-07-2012, 02:02 PM	#4
89JDM240sx Zilvia Member Join Date: Jan 2012 Location: Newark Nj Posts: 235 Trader Rating: (0) Feedback Score: 0 reviews	Is there something wrong with the one that's in there now? What motor? __________________ Boost makes me sooooooo happy!

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03-07-2012, 01:41 PM	#3
tapdeznutz Nissanaholic! Join Date: May 2011 Location: Long Beach Age: 45 Posts: 1,801 Trader Rating: (50) Feedback Score: 50 reviews	what is the flow rate of the stock fuel pump. i was looking and saw that walbro offers a 190 and 255 lph units.

03-08-2012, 05:08 PM	#5
mcgraneimports Join Date: Feb 2012 Location: waterloo ny Age: 36 Posts: 15 Trader Rating: (0) Feedback Score: 0 reviews	its an sr the motors not in it s13 car it dont turn on when i turn the key it works when i jump the relay

03-08-2012, 08:49 PM	#7
merijndj Join Date: Sep 2011 Location: Netherlands Posts: 11 Trader Rating: (0) Feedback Score: 0 reviews	The ECU certainly does sent the signal to the fuel pump relay. When you turn the key, the click you hear is the ECCS relay (in other words, you turn the ecu on). The ECU then 'primes' the fuel system (runs fuel pump for 5 seconds) then stops it. After that the only time that the fuel pump is running, is when the CAS is turning around. (CAS - Crankshaft Angle Sensor). There is a small switch inside the ECU that goes bad sometimes, it is user serviceble IF you can solder very well and know where to look.