injector questions (denso)

rc_subu3 · 01-15-2022, 10:50 AM

Hi guys sorry if this post is broken up, i am also fairly noob in my opinion.

i recently got a p303 code with rough idle-

We were thinking injector 3 was shot, but after checking injectors and seals- found out the spark plug cable went bad (Ohms check with multimeter verified this)

So my question/s today are about "coding injectors" because I've never heard about this before,( i have what looks like oem denso yellows) oem spark plug wires.

Also, do people just get oem or NGK spark plug wires- I've been looking for 2 days online now for reviews and the dealer wants 80$ for the lot of them. Responses include the NGK's are short possibly? NGK RC-FX101 is what i got off the ngk website.

Thanks for your time as always.

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Cameron Shaw · 01-30-2025, 11:11 AM

I have a 1993 WRX (JDM) On the factory wiring diagram the ECU pin-outs for the injectors are labeled #1 B44 13, #2 B44 12, #3 B44 11, #4 B44 26. Does #1 #2 #3 #4 refer to Firing order or cylinder number. I believe that these numbers for the coils refer to firing order. Thanks, Cameron

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01-15-2022, 10:50 AM	#1
rc_subu3 Scooby Newbie Member#: 446687 Join Date: May 2016 Chapter/Region: MAIC Location: Stroudsburg pa Vehicle: 2010 Impreza OBS 2-tone Black/Grey	injector questions (denso) Hi guys sorry if this post is broken up, i am also fairly noob in my opinion. i recently got a p303 code with rough idle- We were thinking injector 3 was shot, but after checking injectors and seals- found out the spark plug cable went bad (Ohms check with multimeter verified this) So my question/s today are about "coding injectors" because I've never heard about this before,( i have what looks like oem denso yellows) oem spark plug wires. Also, do people just get oem or NGK spark plug wires- I've been looking for 2 days online now for reviews and the dealer wants 80$ for the lot of them. Responses include the NGK's are short possibly? NGK RC-FX101 is what i got off the ngk website. Thanks for your time as always. * Registered users of the site do not see these ads. Last edited by rc_subu3; 01-15-2022 at 12:17 PM.

01-30-2025, 11:11 AM	#2
Cameron Shaw Scooby Newbie Member#: 475207 Join Date: Sep 2017	I have a 1993 WRX (JDM) On the factory wiring diagram the ECU pin-outs for the injectors are labeled #1 B44 13, #2 B44 12, #3 B44 11, #4 B44 26. Does #1 #2 #3 #4 refer to Firing order or cylinder number. I believe that these numbers for the coils refer to firing order. Thanks, Cameron