code PO171 PO174
#1
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code PO171 PO174
and two others that he said are "basically the same"
wtf?
he said
"not only lean, but it says 'too lean'"
so my mods are listed below,
what do you guys think i should do?
i am thinking since i need speedo calib,
and torque management to pack its bags,
and i have an effed up a:f
maybe custom dyno tuning?
..i really wanted to do it only once after heads cam and all mods
anyone know why this is?
a friend of mine told me that from the stench of my exhaust i am running rich. and my pipes were caked black within a day. wtf?
wtf?
he said
"not only lean, but it says 'too lean'"
so my mods are listed below,
what do you guys think i should do?
i am thinking since i need speedo calib,
and torque management to pack its bags,
and i have an effed up a:f
maybe custom dyno tuning?
..i really wanted to do it only once after heads cam and all mods
anyone know why this is?
a friend of mine told me that from the stench of my exhaust i am running rich. and my pipes were caked black within a day. wtf?
#2
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Those codes mean both banks are 25% too lean. If it's a hard code (light on all of the time) it means the Long Term Fuel Trims (LTFM) are 25% positive; like I said too lean.Most of the time it can be pinpointed back to a MAF, but can be other problems. You need to remember if it came on when you did some mods or has it been on a long time. You can clear the code, but it will come back after a complete drive cycle. You need to Autotap the car and log the fuel trims and O2's.
#3
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Maybe a vacuum leak. Mine was doing the exact same thing, except mine was intermitent. I traced it back to a vacuum leak that only showed up when the engine was warm.