hardwiring my fuel pump questions - Zilvia.net Forums | Nissan 240SX (Silvia) and Z (Fairlady) Car Forum

zenki14 · 02-20-2011, 12:06 PM

i need to hardwire my walbro since my harness isnt sending a signal to my fuel pump. can anyone show me a picture of where to wire the relay to the fuel pump because thats all i cant find i know which posts go where from the relay i need a 15-20 amp fuse in the wire going to the battery i just dont know what to wire the relay to from the pump to the relay
its for my s13

lexlaxlux · 02-20-2011, 12:17 PM

Attached. I would replaced that inline 30 with something smaller just in case. Search next time yo!

zenki14 · 02-20-2011, 12:34 PM

Quote:

Originally Posted by lexlaxlux

Attached. I would replaced that inline 30 with something smaller just in case. Search next time yo!

i know i know i was searching for about an hour before i posted this but couldnt find exactly what i was looking for but the wire connecting from 30 to the black/blue wire on the pump assembly is just gonna go on the under side of the top cover and the 86 goes on the top harness for it correct?

KiLLeR2001 · 02-20-2011, 12:43 PM

How about fixing the harness? It makes no sense to just wire in another system when you have a perfect OEM setup to utilize. Stop being lazy and fix your wiring. Check your wiring, make sure the relay is clicking on. ECU sends signal to the fuel pump relay, relay sends power to fuel pump. There's a 10A fuse for the fuel pump, not 15-20A like you are suggesting.

zenki14 · 02-20-2011, 08:14 PM

i tried thats pretty much why it hasnt ran for two months i cant find why so i just hardwired it and now i got it running again today

icantsleeps · 02-20-2011, 11:41 PM

quick question, so what if a yellow wire isnt connected on the relay? will the fuel pump keep pumping?

lucas13dourado · 02-22-2011, 11:58 AM

there is a reason why the factory puts the wiring that way, PLEASE fix it.

in case you didn't know: the ECU only turns on the fuel pump when it gets a signal from the engine speed sensor, the reason for that is in case you get in an accident and your car is leaking fuel the ECU will turn the fuel pump off as soon as it realizes the crank angle is no longer turning (in 98% of accidents the car stalls). If you hard wire your fuel pump and you have a leak your pump will still be shooting out fuel causing making everything worst/more dangerous.

not hating, just informing

02-20-2011, 12:06 PM	#1
zenki14 Leaky Injector Join Date: Apr 2009 Location: albuquerque Posts: 147 Trader Rating: (1) Feedback Score: 1 reviews	hardwiring my fuel pump questions i need to hardwire my walbro since my harness isnt sending a signal to my fuel pump. can anyone show me a picture of where to wire the relay to the fuel pump because thats all i cant find i know which posts go where from the relay i need a 15-20 amp fuse in the wire going to the battery i just dont know what to wire the relay to from the pump to the relay its for my s13

02-20-2011, 12:43 PM	#4
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	How about fixing the harness? It makes no sense to just wire in another system when you have a perfect OEM setup to utilize. Stop being lazy and fix your wiring. Check your wiring, make sure the relay is clicking on. ECU sends signal to the fuel pump relay, relay sends power to fuel pump. There's a 10A fuse for the fuel pump, not 15-20A like you are suggesting. __________________

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02-20-2011, 08:14 PM	#5
zenki14 Leaky Injector Join Date: Apr 2009 Location: albuquerque Posts: 147 Trader Rating: (1) Feedback Score: 1 reviews	i tried thats pretty much why it hasnt ran for two months i cant find why so i just hardwired it and now i got it running again today

02-20-2011, 11:41 PM	#6
icantsleeps Zilvia Member Join Date: Jul 2009 Location: Dallas, Texas Age: 32 Posts: 164 Trader Rating: (1) Feedback Score: 1 reviews	quick question, so what if a yellow wire isnt connected on the relay? will the fuel pump keep pumping?

02-22-2011, 11:58 AM	#7
lucas13dourado Leaky Injector Join Date: Jan 2011 Location: Seattle Age: 33 Posts: 124 Trader Rating: (2) Feedback Score: 2 reviews	there is a reason why the factory puts the wiring that way, PLEASE fix it. in case you didn't know: the ECU only turns on the fuel pump when it gets a signal from the engine speed sensor, the reason for that is in case you get in an accident and your car is leaking fuel the ECU will turn the fuel pump off as soon as it realizes the crank angle is no longer turning (in 98% of accidents the car stalls). If you hard wire your fuel pump and you have a leak your pump will still be shooting out fuel causing making everything worst/more dangerous. not hating, just informing