62/63 Harness missing Pin 105 - Zilvia.net Forums | Nissan 240SX (Silvia) and Z (Fairlady) Car Forum

Socal240sxSr20det · 10-12-2019, 02:35 PM

I'm currently trying to get my blacktop sr20det to start and i'm having issues with my fuel pump not priming. I noticed that pin 105 is missing for "Fuel pressure control module". Its a wiring specialties harness, used. No unpinned wires are coming out of the loom so, i'm confused. Is this the cause of my issue, or its not needed.

S14rebuild · 10-12-2019, 02:43 PM

Pin 105 is not needed on an sr20 swap

Lets get to basics...

Do you have spark?

Do you have fuel pressure?

Do you have injector pulse?

Socal240sxSr20det · 10-12-2019, 02:49 PM

Yes, i'm getting spark, and injectors are firing. When i turn the CAS i can hear/feel the fuel pump relay clicking but the pump will not prime. I've checked and i'm getting power through the front harness, and to pin 104. But no power to the fuel pump harness, but it works fine on the bench test. I've tried 2 ecu's and don't think thats the issue. switched relay's and fuel pump fuse.

S14rebuild · 10-12-2019, 06:59 PM

If the fuel pump relay is clicking then 3 things

1 bad relay

2 bad wiring from relay to fuel pump

3 bad fuel pump

Uve eliminated 1 and 3

Sonid be tracing wires from your fuel pump relay, to ur fuel pump.

Also make sure the fuel pump is grounded properly

10-12-2019, 02:35 PM	#1
Socal240sxSr20det Join Date: Oct 2017 Location: Oceanside Posts: 13 Trader Rating: (0) Feedback Score: 0 reviews	62/63 Harness missing Pin 105 I'm currently trying to get my blacktop sr20det to start and i'm having issues with my fuel pump not priming. I noticed that pin 105 is missing for "Fuel pressure control module". Its a wiring specialties harness, used. No unpinned wires are coming out of the loom so, i'm confused. Is this the cause of my issue, or its not needed.

10-12-2019, 02:43 PM	#2
S14rebuild BANNED Join Date: May 2019 Location: Florida-FAIL Posts: 2,495 Trader Rating: (8) Feedback Score: 8 reviews	Pin 105 is not needed on an sr20 swap Lets get to basics... Do you have spark? Do you have fuel pressure? Do you have injector pulse?

10-12-2019, 02:49 PM	#3
Socal240sxSr20det Join Date: Oct 2017 Location: Oceanside Posts: 13 Trader Rating: (0) Feedback Score: 0 reviews	Yes, i'm getting spark, and injectors are firing. When i turn the CAS i can hear/feel the fuel pump relay clicking but the pump will not prime. I've checked and i'm getting power through the front harness, and to pin 104. But no power to the fuel pump harness, but it works fine on the bench test. I've tried 2 ecu's and don't think thats the issue. switched relay's and fuel pump fuse.

10-12-2019, 06:59 PM	#4
S14rebuild BANNED Join Date: May 2019 Location: Florida-FAIL Posts: 2,495 Trader Rating: (8) Feedback Score: 8 reviews	If the fuel pump relay is clicking then 3 things 1 bad relay 2 bad wiring from relay to fuel pump 3 bad fuel pump Uve eliminated 1 and 3 Sonid be tracing wires from your fuel pump relay, to ur fuel pump. Also make sure the fuel pump is grounded properly