Cylinder MIsfire Code P0303 P0304

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05-24-2005, 08:42 AM

kcismo

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Thread Starter

Join Date: May 2005

Posts: 1

Cylinder MIsfire Code P0303 P0304

ok. i just got these codes this morning heading into work. the CEL was blinking before it finally just stayed on. MY02 is at 50k with no mods. i noticed that the car idles a bit rougher and i'm loosing 100+ miles on a tank of gas.

i did run out of gas a couple of weekends ago and had to walk to a gas station. could this be the reason? are these code to be concerned about? big bucks to fix?

thanks for the help

05-31-2005, 05:30 PM

sigma pi

9 to 5 mod

iTrader: (6)

Join Date: Jan 2003

Location: Chavez Ravine

Posts: 57,386

Car Info: 03 Impreza WRX

start with changing the plugs

yo uma havbe messed up the injectors causing it to run lean and foul the plugs and not run right

change tehm and post up a pic

06-23-2005, 11:28 AM

mike26

Registered User

Join Date: Dec 2004

Posts: 13

Maybe You Should Consider A Valve Adjust, Pretty Common In Earlier Models. Also Possibly A Ecm Reflash.
Valve Adjust Is Covered For 3 And 36 Only, It Is A Maint. Item.
I Have Seen Alot With Tight Valves, Mainly Exhuast.