P0243 & p0171 - EvoXForums.com - Mitsubishi Lancer Evolution X Forums
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Evo X General General discussion on the 2008+ Mitsubishi Lancer Evolution X

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Old 03-04-2019, 11:50 PM   #1
nespi13
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P0243 & p0171

Hello guys, after months of trying to track down this code I am coming to you guys, I have an evo x MR, almost full bolt ons e85, took my car in to the stealership for an sst service, ever since then the code p0243 and p0171 code has not gone away, it comes back every cycle, I replaced my 3port and the car still loses boost pressure example it would hit 29 lbs and stay through 6th around 28lbs, now the car wont peak past 26 and falls to 18 lbs, side note I'm on a pro tune, I'd appreciate your input, thanks
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Old 05-23-2019, 01:57 PM   #2
TSX101
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Have you gone over your vaccum lines?
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