tuning on bad gas
tuning on bad gas ok everyone tunes on 91 or 93 or 93+meth. well what if i need gas and 87 is all i can find.
so i am wondering. can i tune my car for 87 and when i use better gas it just acts better?
so i am wondering. can i tune my car for 87 and when i use better gas it just acts better?
There are low octane and high octane tables in the PCM - if you run the 87 it should/would cause some knock and then I believe the PCM would switch to using the low octane tables..... if you are running the 87 to save a few bucks it will end up costing you more in the long run
not the point of "i want to save a buck" just i leave in iowa. and there has been some times in the past where i could only find 87 when i was driving around on sunday or just crusing.
I would equate tuning a peformance vehicle on 87 gas tantamount to turning your underwear inside out before you go out on a hot date after a long day of working outside. You could do it but, I don't think your'e going to end up getting what you really want.
I understand that and have had to do it myself couple times when at home and barely anything in the tank - used gas from our 300 gallon tank for the tractor, live in the boonies and figure its better than runnin it dry and frying the fuel pump........ just postin a caution 
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You can run it no problem for light cruising, but do not go WOT. I realized the low octane table will retard the spark, but, it will get stuck there for a while even after you fill up with the good stuff. I guess if you get in that situation, fill it up enough to get to a real gas station and then put in the 91.
You will get worse fuel mileage with 87 as well.
You will get worse fuel mileage with 87 as well.
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