crazymofo1986

iTrader: (3)

not paying attention i put in 87 all the way up from empty. i had a tune for premiume only gas. so i dont know if it will go back to the 87 curve. what is gonna happen?

brad8266

iTrader: (23)

If it experiences knock, the PCM will retard it automatically via the knock sensors. Just dont go WOT till you run the 87 through.

skifast87

go real easy on it. Like real easy one it. If you here any knocking or pinging noises get your foot out of the gas.

crazymofo1986

iTrader: (3)

u think i should throw some octane booster in there?

ls1chris

man dont feel to bad i did the same one time i i was on e and thats all the gas station had so i put like 15 bucks in then i just went and got some racing gas 114 octane put about 5 bucks of it in their should bump your octane back up pretty good

ls1chris

man dont feel to bad i did the same one time i i was on e and thats all the gas station had so i put like 15 bucks in then i just went and got some racing gas 114 octane put about 5 bucks of it in their should bump your octane back up pretty good but i swear i think these cars get use to running higher octane gas and if you put lower in to me it seems the run like crap like wheni ran racing gas it seemed to run smother and go wot better i dont knwo prolly in my head

shizon

iTrader: (1)

It takes substantially longer for a pcm to go back to the high octane spark tables than to go to lower because of 87 octane.

I would stay clear of high loads/rpms until the gas tank is gone. Most probably case is you'll get some knock and go to the low octane and it'll take a tank or 2 of premium to get back to higher spark values.

Worst case is your tune doesn't use the low octane tables anymore and you'll knock for the whole tank. If that happens, just make sure you stay out of it.