sr20 wiring/ground/fp problem - Zilvia.net Forums | Nissan 240SX (Silvia) and Z (Fairlady) Car Forum

jvega · 02-18-2011, 09:17 PM

hello everyone!
im having problems starting my s13 sr.
i bought a brand new harness, wired it up directly to the chassis clips, because i didnt have the Ka harness,
and the fuel pump will not prime.
---
The fuel pump primes ONLY when i *ground the wires by the battery*(black and pink), **but the fuel pump stays on**.

any ideas what it could be?
perhaps bad wiring job
or bad grounds?
any advice is greatly appreciated. thanks!

jvega · 02-18-2011, 09:23 PM

i double checked all the grounds and they all seem to be good.
i double checked my wiring job and it seems ok.
The fuel pump stays on when i ground the black/pink stripe fuel pump relay wires.. its wierd

92dagrey · 02-19-2011, 10:10 AM

bad relay. or the wires to/from the relay are bad.

cotbu · 02-20-2011, 04:23 PM

The ecu is supposed to ground the black and pink wire for the fuel pump relay.
It is to be connected to pin 104 on the ecu.

jvega · 02-21-2011, 12:24 PM

do you think this problem is happening because the ECU is not grounded?

Sileighty_85 · 02-21-2011, 01:40 PM

check this out

http://zilvia.net/f/tech-talk/327189...-problems.html

jvega · 02-21-2011, 02:14 PM

Quote:

Originally Posted by Sileighty_85

check this out

http://zilvia.net/f/tech-talk/327189...-problems.html

Thanks for the info, im gonna give that a try..
btw i bought my engine from Jdm-online. I hope nothings wrong with it. I havent driven or started the motor yet.

JDM Nissan Silvia SR20DET S13 Blacktop *Upgraded* Motor '94-'98 - Sold - JDM Online

jvega · 02-21-2011, 07:11 PM

*UPDATE*
I managed to get all the clips from a KA harness, and clipped everything in, rewired everything. (sr20 engine harness to chassis harness)
But it still has the same problem...(fuel pump wont prime, unless i ground the black/pink wires, but it stays on)
Bad ECU maybe?

Ekin_s13 · 02-21-2011, 09:58 PM

try this site SR20DET Swap Engine Harness Wiring Diagram Guide SR SR20

i use this site to wired my new sr harness

jvega · 02-21-2011, 10:06 PM

*UPDATE*
Tried my ecu(E5) on my friends sr which also uses the E5 ecu, and it would not start, no fuel pump sound or nothing!
so im asuming my ECU is bad..
Anyone selling a s13 blacktop ecu??

Thank you guys for the help!

240sx-pat · 04-12-2011, 01:35 AM

So How did this go? I'm having the same issue

Slow Poke · 04-18-2011, 09:39 AM

Are you sure you have a harness setup for the S13 blacktop ECU?

lok · 04-18-2011, 10:35 AM

Did you actually rewire the plugs by the battery tray?

You cant just wire the colors that match together you have to move them around to other pins.

jvega · 04-22-2011, 06:42 PM

thanks for all the help guys, but it was the ecu.
the ecu was bad.
something about the fuel pump power was wrong in the ecu.
because my friend uses that ecu on his ae86 but he has everything wired directly.

i bought a new ecu, and now my car drives like a beast.

02-18-2011, 09:17 PM	#1
jvega Leaky Injector Join Date: Nov 2010 Location: arizona Age: 36 Posts: 133 Trader Rating: (1) Feedback Score: 1 reviews	sr20 wiring/ground/fp problem hello everyone! im having problems starting my s13 sr. i bought a brand new harness, wired it up directly to the chassis clips, because i didnt have the Ka harness, and the fuel pump will not prime. --- The fuel pump primes ONLY when i ground the wires by the battery(black and pink), but the fuel pump stays on. any ideas what it could be? perhaps bad wiring job or bad grounds? any advice is greatly appreciated. thanks!

02-20-2011, 04:23 PM	#4
cotbu Post Whore! Join Date: Sep 2005 Location: SWFL Age: 50 Posts: 3,318 Trader Rating: (3) Feedback Score: 3 reviews	The ecu is supposed to ground the black and pink wire for the fuel pump relay. It is to be connected to pin 104 on the ecu. __________________ LoverTechnologies "Half Broken Things!"

02-21-2011, 01:40 PM	#6
Sileighty_85 Post Whore! Join Date: Dec 2006 Location: Misawa, Japan Posts: 6,815 Trader Rating: (8) Feedback Score: 8 reviews	check this out http://zilvia.net/f/tech-talk/327189...-problems.html __________________ 後輪駆動車１番 1989 Built SR GT2871R -363whp 1998 S14 W/RB25- 250ish (For Now) 1986 SR86 - 200ish 1990 R32 GTR - 320hp Don't Buy Engines from JDM-Online http://zilvia.net/f/businesses/207457-jdm-online.html Don't Buy XS-Power or SSAC Shit

02-18-2011, 09:23 PM	#2
jvega Leaky Injector Join Date: Nov 2010 Location: arizona Age: 36 Posts: 133 Trader Rating: (1) Feedback Score: 1 reviews	i double checked all the grounds and they all seem to be good. i double checked my wiring job and it seems ok. The fuel pump stays on when i ground the black/pink stripe fuel pump relay wires.. its wierd

02-19-2011, 10:10 AM	#3
92dagrey Join Date: Feb 2011 Location: Harrisburg, PA Age: 36 Posts: 16 Trader Rating: (0) Feedback Score: 0 reviews	bad relay. or the wires to/from the relay are bad.

02-21-2011, 12:24 PM	#5
jvega Leaky Injector Join Date: Nov 2010 Location: arizona Age: 36 Posts: 133 Trader Rating: (1) Feedback Score: 1 reviews	do you think this problem is happening because the ECU is not grounded?

02-21-2011, 07:11 PM	#8
jvega Leaky Injector Join Date: Nov 2010 Location: arizona Age: 36 Posts: 133 Trader Rating: (1) Feedback Score: 1 reviews	UPDATE I managed to get all the clips from a KA harness, and clipped everything in, rewired everything. (sr20 engine harness to chassis harness) But it still has the same problem...(fuel pump wont prime, unless i ground the black/pink wires, but it stays on) Bad ECU maybe?

02-21-2011, 09:58 PM	#9
Ekin_s13 Join Date: Jan 2010 Location: San Diego Posts: 36 Trader Rating: (0) Feedback Score: 0 reviews	try this site SR20DET Swap Engine Harness Wiring Diagram Guide SR SR20 i use this site to wired my new sr harness

02-21-2011, 10:06 PM	#10
jvega Leaky Injector Join Date: Nov 2010 Location: arizona Age: 36 Posts: 133 Trader Rating: (1) Feedback Score: 1 reviews	UPDATE Tried my ecu(E5) on my friends sr which also uses the E5 ecu, and it would not start, no fuel pump sound or nothing! so im asuming my ECU is bad.. Anyone selling a s13 blacktop ecu?? Thank you guys for the help!

04-12-2011, 01:35 AM	#11
240sx-pat Zilvia Member Join Date: Jan 2011 Location: DALLAS, TX Age: 38 Posts: 290 Trader Rating: (8) Feedback Score: 8 reviews	So How did this go? I'm having the same issue

04-18-2011, 09:39 AM	#12
Slow Poke Zilvia FREAK! Join Date: Mar 2007 Location: Maryland Posts: 1,199 Trader Rating: (2) Feedback Score: 2 reviews	Are you sure you have a harness setup for the S13 blacktop ECU?

04-18-2011, 10:35 AM	#13
lok Zilvia Addict Join Date: Jul 2003 Location: Oklahoma Posts: 816 Trader Rating: (10) Feedback Score: 10 reviews	Did you actually rewire the plugs by the battery tray? You cant just wire the colors that match together you have to move them around to other pins.

04-22-2011, 06:42 PM	#14
jvega Leaky Injector Join Date: Nov 2010 Location: arizona Age: 36 Posts: 133 Trader Rating: (1) Feedback Score: 1 reviews	thanks for all the help guys, but it was the ecu. the ecu was bad. something about the fuel pump power was wrong in the ecu. because my friend uses that ecu on his ae86 but he has everything wired directly. i bought a new ecu, and now my car drives like a beast.