P0303 & P0302 Codes, Misfire, Running on 2 Cylinders

bigbird · 09-30-2004, 06:14 PM

Hey all, I got CEL on 2003 WRX.

Running on 2 cylinders, barely idling, dying under load.

Replaced plugs - no help.

Have not had time to check spark or fuel or anything like that.

Before I rip into it, you guys have any suggestions? Tips? Tricks? Methods?

Anyways, advice is apreciated.

Thank you

PS. Could a vacuum leak completely shut off 2 cylinders? Can the timing be completely off?

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HonduHunter · 09-30-2004, 06:17 PM

look at these

http://ken-gilbert.com/wrx/impreza_manuals.htm

zaxrex · 10-01-2004, 12:25 PM

Well, I would try swapping the ignitors and plugs around to see if the missfires track to the other bank.
If it does, get new ignitors and plugs.
If it doesn't, get a firing indicator to see if the ignition wires are deliveringthe pulsed current.
If it doesn't then you will have to track down the wiring problem.-

bigbird · 10-01-2004, 12:28 PM

Got around to checking the spark on each cylinder - strong spark on every cylinder.

wcbjr · 10-01-2004, 12:44 PM

Check the injectors. I am getting a misfire on cylinder 1. I think my injector o-ring has blown out, or in.

09-30-2004, 06:14 PM	#1
bigbird Scooby Specialist Member#: 1685 Join Date: Jun 2000 Location: NISSANTALK.COM / MD Vehicle: 2001 2.5RS-T FMIC WHITE	P0303 & P0302 Codes, Misfire, Running on 2 Cylinders Hey all, I got CEL on 2003 WRX. Running on 2 cylinders, barely idling, dying under load. Replaced plugs - no help. Have not had time to check spark or fuel or anything like that. Before I rip into it, you guys have any suggestions? Tips? Tricks? Methods? Anyways, advice is apreciated. Thank you PS. Could a vacuum leak completely shut off 2 cylinders? Can the timing be completely off? * Registered users of the site do not see these ads.

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09-30-2004, 06:17 PM	#2
HonduHunter Scooby Guru Member#: 28408 Join Date: Oct 2002 Chapter/Region: TXIC Location: San Antonio, Tx Vehicle: 2002 BugEye WRX PSM	look at these http://ken-gilbert.com/wrx/impreza_manuals.htm

10-01-2004, 12:25 PM	#3
zaxrex Scooby Specialist Member#: 9898 Join Date: Sep 2001 Chapter/Region: MAIC Location: VA near MD Vehicle: 2002 WRX Water Injected Blue	Well, I would try swapping the ignitors and plugs around to see if the missfires track to the other bank. If it does, get new ignitors and plugs. If it doesn't, get a firing indicator to see if the ignition wires are deliveringthe pulsed current. If it doesn't then you will have to track down the wiring problem.-

10-01-2004, 12:28 PM	#4
bigbird Scooby Specialist Member#: 1685 Join Date: Jun 2000 Location: NISSANTALK.COM / MD Vehicle: 2001 2.5RS-T FMIC WHITE	Got around to checking the spark on each cylinder - strong spark on every cylinder.

10-01-2004, 12:44 PM	#5
wcbjr Scooby Guru Member#: 4001 Join Date: Feb 2001 Location: I love spherical bearings! Vehicle: 2006 Legacy GT Obsidian black	Check the injectors. I am getting a misfire on cylinder 1. I think my injector o-ring has blown out, or in.