quick question injector wiring - Zilvia.net Forums | Nissan 240SX (Silvia) and Z (Fairlady) Car Forum

chieu · 06-25-2016, 05:29 PM

hey guys im currently taking apart a ka-t s14. i need to know if this is a resistor box (picture below) the car has low impedance top feed injectors. Im pretty sure its a resistor box. but i want to be 100%. also when i took it out the wiring harness i noticed that there are 3 other wires they seem like they were cut. 2 red wires and a brown/red wire. just sitting there next to red wire they ran to the resistor box. do i need to wire each of my injectors to each one of those red wires. i got some stock injector pigtails from an s13 and all 4 injectors connect together to one single red wire.. how would i need to wire in the stock injector pig tails..... thanks guys!

KAT-PWR · 06-25-2016, 05:48 PM

That all depends what injectors you are using

chieu · 06-25-2016, 06:40 PM

i just need to know if i should wire each injector to each one of the 3 red wire and the black/red wire. OR just wire in the 4 injectors to one hot wire. the wiring diagram shows that all 4 injectors connects to a black/red wire.. what are the other 3 red ones then... lol

and is that picture a resistor box and does it come stock with a 240... lol

running stock injectors.

KAT-PWR · 06-25-2016, 07:27 PM

You should not need a resistor if you are running OEM injectors. Get rid of whatever cob job the previous owner did. Find the OEM wiring and repair it.

Also I don't believe the injectors all connect to one wire. There is a single wire that runs a signal to each individual injector. They don't all fire at the same time.

chieu · 06-25-2016, 07:54 PM

i already have stock harness of an s13 . on the stock s13 harness all 4 injectors join together and hook up to one hot (power) power wire. i have an s14 tho. i am asking about the power wires. not the ecu signal wires. injector should have power at all times waiting for signal (ecu ground)

i should have taken a pic of the harness side..

06-25-2016, 05:29 PM	#1
chieu Join Date: Oct 2005 Location: NJ Posts: 16 Trader Rating: (1) Feedback Score: 1 reviews	quick question injector wiring hey guys im currently taking apart a ka-t s14. i need to know if this is a resistor box (picture below) the car has low impedance top feed injectors. Im pretty sure its a resistor box. but i want to be 100%. also when i took it out the wiring harness i noticed that there are 3 other wires they seem like they were cut. 2 red wires and a brown/red wire. just sitting there next to red wire they ran to the resistor box. do i need to wire each of my injectors to each one of those red wires. i got some stock injector pigtails from an s13 and all 4 injectors connect together to one single red wire.. how would i need to wire in the stock injector pig tails..... thanks guys!

06-25-2016, 05:48 PM	#2
KAT-PWR Nissanaholic! Join Date: Dec 2011 Location: US Posts: 2,040 Trader Rating: (11) Rides Gallery: KAT-PWR Feedback Score: 11 reviews	That all depends what injectors you are using __________________ MRP Manufacturing

06-25-2016, 07:27 PM	#4
KAT-PWR Nissanaholic! Join Date: Dec 2011 Location: US Posts: 2,040 Trader Rating: (11) Rides Gallery: KAT-PWR Feedback Score: 11 reviews	You should not need a resistor if you are running OEM injectors. Get rid of whatever cob job the previous owner did. Find the OEM wiring and repair it. Also I don't believe the injectors all connect to one wire. There is a single wire that runs a signal to each individual injector. They don't all fire at the same time. __________________ MRP Manufacturing

06-25-2016, 06:40 PM	#3
chieu Join Date: Oct 2005 Location: NJ Posts: 16 Trader Rating: (1) Feedback Score: 1 reviews	i just need to know if i should wire each injector to each one of the 3 red wire and the black/red wire. OR just wire in the 4 injectors to one hot wire. the wiring diagram shows that all 4 injectors connects to a black/red wire.. what are the other 3 red ones then... lol and is that picture a resistor box and does it come stock with a 240... lol running stock injectors.

06-25-2016, 07:54 PM	#5
chieu Join Date: Oct 2005 Location: NJ Posts: 16 Trader Rating: (1) Feedback Score: 1 reviews	i already have stock harness of an s13 . on the stock s13 harness all 4 injectors join together and hook up to one hot (power) power wire. i have an s14 tho. i am asking about the power wires. not the ecu signal wires. injector should have power at all times waiting for signal (ecu ground) i should have taken a pic of the harness side..