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Old 01-13-2014, 09:58 AM   #28
Supa LA
Scooby Newbie
Member#: 344540
Join Date: Jan 2013
Chapter/Region: MWSOC
Location: Southern Indiana
2015 Mustang 5.0
Guard Metallic


I have had a similar issue of late in my 05 sti. My car doesnt jerk, just seems to hesitate. This only happens while crusing at around 2200-2600 rpm in higher gears, like 4th-6th. Its mainly when im trying to hold speed without the cruise on. Can bad gas cause this? My oil is fine and i have had no issues with the tune before? HOWEVER, the last oil change was with T6. The previous owner ran Mobil1 5w30/40 depending on season (hot/cold) All of this started happening about one month ago (roughly). When i give it throttle it powers thru just fine. I have seen no issues on lower gears or speeds.

Mods are:

big maf intake
3" straight pipe
engine mounts
several other minimal ones.
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