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Help! 04 stl misfiring at high rpm

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Old 08-26-2016, 12:13 PM
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Help! 04 stl misfiring at high rpm
My 04 sti is misfiring at high rpm. The only code I had for awhile is p0171. I dont know if i had that before this problem happened. Please help!
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Old 08-26-2016, 12:55 PM
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Been googling the symptoms. Could it possibly be my valves/springs?
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Old 08-26-2016, 02:36 PM
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Coilpacks? No code popping up for misfired. Helppp
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Old 08-28-2016, 01:21 AM
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Whats your vaccum reading on your boost gauge at idle? If its not -20ish you have a vac leak and that's whats causing the misfires most likely.
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Old 08-28-2016, 07:36 PM
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Thanks for reply krang! I pmed you
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Old 08-28-2016, 10:07 PM
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Read a thread on nasioc with a similar maybe same problem and they got it fixed by fixing the gap with the crank sensor
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Old 08-31-2016, 09:33 AM
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I had this same issue. Ended up being a fuel leak under my turbo inlet hose. I was getting missfire codes on all 4 cyl. Try mash your car and pull over as quick as you can, pop the hood and see if you smell fuel around that area


Originally Posted by stets
My 04 sti is misfiring at high rpm. The only code I had for awhile is p0171. I dont know if i had that before this problem happened. Please help!
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Old 09-09-2016, 03:30 PM
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Originally Posted by Huntercw2003
I had this same issue. Ended up being a fuel leak under my turbo inlet hose. I was getting missfire codes on all 4 cyl. Try mash your car and pull over as quick as you can, pop the hood and see if you smell fuel around that area
Thanks for th help. I changed my spark plugs and coil packs and misfire went away
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Old 09-10-2016, 08:20 PM
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Originally Posted by stets
Thanks for th help. I changed my spark plugs and coil packs and misfire went away
Awesome!
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