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Old 01-23-2013, 11:06 AM   #2
Scooby Newbie
Member#: 285150
Join Date: Jun 2011
Chapter/Region: Tri-State
Location: Philadelphia, PA
2003 WRX


Hello Luke,

I'm having some misfiring issues myself and currently trying to fix it.

So currently your vehicle only misfires at cold starts? When it warms up let say 10-15 minutes your vehicle have no misfiring issues?

Since you recently changed your plugs, did you check or gapped your plugs? I believe gap spec for this car is .028 - .032?

Before you go ahead and start throwing more money into it. I would suggest you to check that everything is grounded correctly (no corrosion/ loose connection) Then I would attempt to clean out your MAF sensor and see if the connection is good.

And as far as your plugs, you can refer to this:

By the look of your plugs, I would attempt to swap the injectors also to see what you get.

Good luck.
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Last edited by P.Huynh; 01-23-2013 at 11:16 AM.
P.Huynh is offline   Reply With Quote