Fuel Pump not priming.. - Zilvia.net Forums | Nissan 240SX (Silvia) and Z (Fairlady) Car Forum

themda · 08-26-2011, 11:45 AM

i understand that there are a million threads about this but i cant seem to find the answers i want. i have a coupe. it was running well a couple weeks ago and then it didnt start for a whole day. the next day i got in the car and it did start aka i heard the fuel pump prime this time. its been a week since the incident, and behold the car died in the middle of and intersection so i dumped it in a parking lot for the night. i dont hear the fuel pump priming. what exact terminals do i try to jump from the egi pump relay? what wires can i snip from the trunk underneath the fuel pump cover so i can just run a hard 12v to the fuel pump so i can just drive it straight home? thank you

themda · 08-26-2011, 12:16 PM

please anything will help before the silvi gets towed or stolen. i put in my friends relay and still nothing. maybe a grounding problem but i dont know where to check for the ground of the relays.

nujabe · 08-28-2011, 01:08 AM

fuel pump might just be dead i would replace it.. im having the same issue and mine primes but my car will not turn over.. it takes 15 minutes.. to change one out so its worth a try. if you have a buddy who has a spare s13/14 one might just do the trick.

Dboyizmlg · 09-01-2011, 01:44 PM

Your Fuel pump went dead now. The only way to get it started is getting a used one that works for the mean while, or just get a NEW one

themda · 09-01-2011, 09:10 PM

i purchased a used oem one, and installed a new fuel filter. engine still tends to bog and idle rough at start up. where should i start checking grounds?

GroundPerformance · 09-01-2011, 11:05 PM

Is your car lowered on Coils?

themda · 09-01-2011, 11:08 PM

on tein basics yes, why?

GroundPerformance · 09-01-2011, 11:15 PM

Quote:

Originally Posted by themda

on tein basics yes, why?

It's very common but often not noticed is that the chassis harness running on the front driver side fenderwell will rub on the tire and mess up the wire that goes to the fuel pump. This also causes several electrical issues with the car. Its worth checking especially if you already ruled out that the issue is fuel delivery related in which the EGI Pump relay, Fuel Pump and Filter tested good. Voltage MultiMeter is your friend. GL!

themda · 09-02-2011, 12:10 AM

wow would have never thought. i checked under the wheel well and lone behold the plastic covering was rubbed down and some wiring is exposed. what should i do about it?

themda · 09-02-2011, 12:11 AM

and would that effect my idle/accel?

GroundPerformance · 09-02-2011, 12:27 AM

Quote:

Originally Posted by themda

wow would have never thought. i checked under the wheel well and lone behold the plastic covering was rubbed down and some wiring is exposed. what should i do about it?

If its just exposed just tape it and figure out a good way to avoid rubbing with the tires. If the wires are missing few strands already your better of cutting it and solder a new piece of wire. GL!

Quote:

Originally Posted by themda

and would that effect my idle/accel?

Yes.. If you have a bad connection your pump will not be receiving consistment power and cause the erratic idle.

xpinoyxmk · 09-02-2011, 12:43 AM

Is 12v to the fuel pump at idle good?

GroundPerformance · 09-02-2011, 12:48 AM

Quote:

Originally Posted by xpinoyxmk

Is 12v to the fuel pump at idle good?

Yes.. Mine before was reading 11.7 and it was fine. I had to do a relay mod where I will I get the power straight from the battery @ 14.6 so now my aftermarket pump actually performs better.

themda · 09-02-2011, 12:49 AM

Quote:

Originally Posted by xpinoyxmk

Is 12v to the fuel pump at idle good?

yes. lets not thread jack now...

thanks GP, ill see what i can do this weekend, if the problem persists or gets fixed ill post.

GroundPerformance · 09-02-2011, 12:56 AM

Alright. Let us know. GL!

themda · 09-02-2011, 11:25 AM

i also wanted to add that my interior lighting does not come on (book lights/overhead light) but the sunroof switch still does. and the seatbelts only slide up and down when the key is in the ignition, when they use to open whenever a door would open with out the keys. could they be linked to that same harness? i bought the car with a gutted stereo and wires exposed from the crappy removal

GroundPerformance · 09-02-2011, 12:02 PM

Quote:

Originally Posted by themda

i also wanted to add that my interior lighting does not come on (book lights/overhead light) but the sunroof switch still does. and the seatbelts only slide up and down when the key is in the ignition, when they use to open whenever a door would open with out the keys. could they be linked to that same harness? i bought the car with a gutted stereo and wires exposed from the crappy removal

Most Likely.. All these accessories get power from the chassis harness to the fusebox on the driver side kick panel.

themda · 09-02-2011, 03:42 PM

and guess what. their fuses were burnt. Damn you are helpful wish you were in norcal lol could use your help on this rewire from the fender to magically make it not rub

GroundPerformance · 09-02-2011, 04:56 PM

It's easy.. Also you can tuck the chassis harness like this. I don't think you need that much zip tie like on the pic but you get the idea.

themda · 09-02-2011, 05:42 PM

hmm ill have to give it a shot. it is already zip tied, ill have to pull it off and get a better look at how well its on there. and is there a fuse for the seat belts at all? its getting rather annoying having to keep my key in the ignition when i open the door so the seatbelt goes up

08-26-2011, 11:45 AM	#1
themda Leaky Injector Join Date: Aug 2011 Location: cali Age: 31 Posts: 111 Trader Rating: (0) Feedback Score: 0 reviews	Fuel Pump not priming.. i understand that there are a million threads about this but i cant seem to find the answers i want. i have a coupe. it was running well a couple weeks ago and then it didnt start for a whole day. the next day i got in the car and it did start aka i heard the fuel pump prime this time. its been a week since the incident, and behold the car died in the middle of and intersection so i dumped it in a parking lot for the night. i dont hear the fuel pump priming. what exact terminals do i try to jump from the egi pump relay? what wires can i snip from the trunk underneath the fuel pump cover so i can just run a hard 12v to the fuel pump so i can just drive it straight home? thank you Last edited by themda; 03-24-2012 at 06:23 PM..

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08-26-2011, 12:16 PM	#2
themda Leaky Injector Join Date: Aug 2011 Location: cali Age: 31 Posts: 111 Trader Rating: (0) Feedback Score: 0 reviews	please anything will help before the silvi gets towed or stolen. i put in my friends relay and still nothing. maybe a grounding problem but i dont know where to check for the ground of the relays.

08-28-2011, 01:08 AM	#3
nujabe Zilvia Addict Join Date: Oct 2010 Location: BAY AREA CA Posts: 890 Trader Rating: (9) Feedback Score: 9 reviews	fuel pump might just be dead i would replace it.. im having the same issue and mine primes but my car will not turn over.. it takes 15 minutes.. to change one out so its worth a try. if you have a buddy who has a spare s13/14 one might just do the trick.

09-01-2011, 01:44 PM	#4
Dboyizmlg Nissanaholic! Join Date: Aug 2011 Location: SoCal (I.E.), San Berdino, Colton, Redlands Posts: 1,666 Trader Rating: (17) Feedback Score: 17 reviews	Your Fuel pump went dead now. The only way to get it started is getting a used one that works for the mean while, or just get a NEW one

09-01-2011, 09:10 PM	#5
themda Leaky Injector Join Date: Aug 2011 Location: cali Age: 31 Posts: 111 Trader Rating: (0) Feedback Score: 0 reviews	i purchased a used oem one, and installed a new fuel filter. engine still tends to bog and idle rough at start up. where should i start checking grounds?

09-01-2011, 11:05 PM	#6
GroundPerformance Zilvia FREAK! Join Date: Oct 2008 Location: Socal Posts: 1,477 Trader Rating: (44) Feedback Score: 44 reviews	Is your car lowered on Coils?

09-01-2011, 11:08 PM	#7
themda Leaky Injector Join Date: Aug 2011 Location: cali Age: 31 Posts: 111 Trader Rating: (0) Feedback Score: 0 reviews	on tein basics yes, why?

09-02-2011, 12:10 AM	#9
themda Leaky Injector Join Date: Aug 2011 Location: cali Age: 31 Posts: 111 Trader Rating: (0) Feedback Score: 0 reviews	wow would have never thought. i checked under the wheel well and lone behold the plastic covering was rubbed down and some wiring is exposed. what should i do about it?

09-02-2011, 12:11 AM	#10
themda Leaky Injector Join Date: Aug 2011 Location: cali Age: 31 Posts: 111 Trader Rating: (0) Feedback Score: 0 reviews	and would that effect my idle/accel?

09-02-2011, 12:43 AM	#12
xpinoyxmk Zilvia Addict Join Date: Feb 2009 Location: FL Posts: 704 Trader Rating: (11) Feedback Score: 11 reviews	Is 12v to the fuel pump at idle good?

09-02-2011, 12:56 AM	#15
GroundPerformance Zilvia FREAK! Join Date: Oct 2008 Location: Socal Posts: 1,477 Trader Rating: (44) Feedback Score: 44 reviews	Alright. Let us know. GL!

09-02-2011, 11:25 AM	#16
themda Leaky Injector Join Date: Aug 2011 Location: cali Age: 31 Posts: 111 Trader Rating: (0) Feedback Score: 0 reviews	i also wanted to add that my interior lighting does not come on (book lights/overhead light) but the sunroof switch still does. and the seatbelts only slide up and down when the key is in the ignition, when they use to open whenever a door would open with out the keys. could they be linked to that same harness? i bought the car with a gutted stereo and wires exposed from the crappy removal

09-02-2011, 03:42 PM	#18
themda Leaky Injector Join Date: Aug 2011 Location: cali Age: 31 Posts: 111 Trader Rating: (0) Feedback Score: 0 reviews	and guess what. their fuses were burnt. Damn you are helpful wish you were in norcal lol could use your help on this rewire from the fender to magically make it not rub

09-02-2011, 04:56 PM	#19
GroundPerformance Zilvia FREAK! Join Date: Oct 2008 Location: Socal Posts: 1,477 Trader Rating: (44) Feedback Score: 44 reviews	It's easy.. Also you can tuck the chassis harness like this. I don't think you need that much zip tie like on the pic but you get the idea.

09-02-2011, 05:42 PM	#20
themda Leaky Injector Join Date: Aug 2011 Location: cali Age: 31 Posts: 111 Trader Rating: (0) Feedback Score: 0 reviews	hmm ill have to give it a shot. it is already zip tied, ill have to pull it off and get a better look at how well its on there. and is there a fuse for the seat belts at all? its getting rather annoying having to keep my key in the ignition when i open the door so the seatbelt goes up