yea but not in my case. mine is abnormal the boost guage bounces from 4 - 16 after 4k rpm somethings wrong

 

well i think i fixed the problem. i just filled up my car today with 93 octane and octane booster and now my car isnt backfiring or bogging out at all. i dont know if that had anything to do with it but it stopped about 5min after i filled it up.

 

What where you putting in it before?

 

i was putting in 91 octane because where i live theres only like one gas station that sells 93. So i went there today just to see if it would run any better and it did. But i did use some octane booster aswell.

 

AAAAAAH!!!!!! That stuttering is called knock.... its basically like taking a jackhammer to your engine.

Google search "Pre detonation" "pre ignition" or.. "knock" if you want a technical description.

Dont ever put anything lower than 93 in the car

 

oh ****. i didnt know that it had to be at least 93 because it just says premium on the manual. man i hope i didnt mess anything up i only drove it like that for like 5 days prolly less than 400 miles.

 

Its aight.

One way to find out if bad damage was caused is to look at the spark plugs. Pull one or 2 of them and take a look at the tips... looking for little shiney bits. They will be very small.. so look carefully. That, is vapourised aluminum from the pistons that has cooled onto the plugs.