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Old 12-03-2019, 01:06 AM   #1
Scooby Newbie
Member#: 498388
Join Date: Feb 2019
2007 STI
Obsidian Black Pearl

Question all four cylinders misfire after fuel upgrade

upgraded my fuel system to flex fuel and just running the base map my tuner sent me for 91 before we go into e85, car will crank and run for 1-2 seconds very roughly, if i give it gas after starting i can keep it running and the gas is somewhat to pretty responsive but as soon as i try to idle it shuts down. i was giving it that gas to keep it running for a minute and engine light came on and showed up as all four cylinders misfiring, and and PFFFE code or something

AF correction and learn seem to be at 0 which seems off to me.

im thinking it maybe a problem with the tune or maybe even a vacuum leak? but this far ive checked everything and theres nothing that significant. ive had the entire tmic off and it would start and run.

if anyone has any ideas thatd be great
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