CEL Misfire Code at WOT - Subaru WRX Forum
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post #1 of 7 Old 02-16-2017, 02:24 AM Thread Starter
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CEL Misfire Code at WOT

I am having a cylinder 3 misfire on my 2007 WRX TR at near wide open throttle. I can get into boost and go all the way to redline with no problems at say half throttle, but at 75%-100% throttle it misfires and you can feel the car's acceleration breaking up, it is not a pleasant feeling needless to say. I had a loose coil pack connector on that cylinder so i replaced it, but no luck, it still persists, I am stumped as to what it could be if anyone has any insight or information to lead me in the right direction it would be greatly appreciated!!
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post #2 of 7 Old 02-16-2017, 08:46 AM
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clean your injectors. if it still persists, its most likely a tuning issue. probably fuel cut. what are your IDC's? what fuel pump? what mods? we need to know everything about your car to properly help you with your problem.
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post #3 of 7 Old 02-17-2017, 01:00 AM Thread Starter
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Stock fuel pump, the car has a catted invidia downpipe a catted invidia up pipe and an aluminum koyorad radiator. It's stock other than that and the coilovers and wheels. I bought it with these mods and tuned previously to the mods it has is what he said. I had no problems with it for about 4 months until now
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post #4 of 7 Old 02-17-2017, 05:29 AM
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could also be your fuel pump dying. its 10 years old now. if it needs to be replaced, grab a bigger one like a walbro. the GSS342 is cheaper and better than oem. it will support a bigger turbo if you ever decide to upgrade in the future.

might not be a tuning issue since you're mostly stock but wouldnt hurt have the tune checked.

my guess its opensource tuned since you have no accessport?
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Last edited by titter; 02-17-2017 at 08:55 AM.
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post #5 of 7 Old 02-17-2017, 01:51 PM
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How many miles on it? have your plugs been changed i have seen people put aftermarket spark plugs in thinking they are doing better but instead they cause a misfire. use only factory Subaru spark plugs this is coming from a service manager with first hand experience with this issue.
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post #6 of 7 Old 02-21-2017, 01:58 AM Thread Starter
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Quote:
Originally Posted by titter View Post
could also be your fuel pump dying. its 10 years old now. if it needs to be replaced, grab a bigger one like a walbro. the GSS342 is cheaper and better than oem. it will support a bigger turbo if you ever decide to upgrade in the future.

might not be a tuning issue since you're mostly stock but wouldnt hurt have the tune checked.

my guess its opensource tuned since you have no accessport?
It was protuned at all wheel drive tuning in flower mound texas according to the man i bought it from, and is there a way i could test my fuel pump to see if its the problem
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post #7 of 7 Old 02-21-2017, 01:59 AM Thread Starter
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How many miles on it? have your plugs been changed i have seen people put aftermarket spark plugs in thinking they are doing better but instead they cause a misfire. use only factory Subaru spark plugs this is coming from a service manager with first hand experience with this issue.
It has 145,000 on it now opposed to when i bought it with 139,000. He changed the plugs prior to selling it and ive even pulled them and checked the gap
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