nahasapeemapetalon

iTrader: (9)

About a month ago I ran 102 unleaded for a track day. Later that night the car would bearly run, Longterm fuel trim was reading funny(red in hp tuners and somtimes 25)
So i changed my 02 sensors and mixed in some 91 octane and it seemed to go away. It still runs rich on motor and N20. What else would cause funny readings from the long term fuel trim?

cablebandit

iTrader: (37)

maybe it needs to relearn the fuel trims over time. race gas makes mine run richer but not for others

jimmyblue

iTrader: (11)

Maybe the unleaded was not really unleaded. There's a station
around my way that is notorious for mixing the race-gas pumps
up.

edcmat-l1

iTrader: (10)

^^^Yep. Sounds like you ran some leaded through it.

nahasapeemapetalon

iTrader: (9)

Yea, i changed both o2's and it still seems funny, ill do some more checking.

5_02ls1

iTrader: (20)

ive ran leaded 110 in my 98 several times never really had an issue hmmm wierd

edcmat-l1

iTrader: (10)

You're lucky. It usually kills em in no time.