Join Date: Jun 2013
Location: Nanaimo, BC, Canada
Re: HORRIBLE mpg!
Don't trust the gauge for partial readings. Fill up again and note how many miles you've put on since the first fill up to calculate the actual mileage. I always go by miles (km up here) per tank as my mileage. Put more miles on it before jumping to conclusions. I'm guessing you are getting some black smoke if your loosing boost? Also what is your truck?
E99 f350 lariat scsb 7.3L auto, 8" lift, 37" toyos, 4" diamond exhaust, boost and egt gauges, bullydog gt, dp f6, L99 rear seat swap, K&N cold air kit, more to come
88 5.0L gt 5spd convertable, lowered, 17's, flowmasters, centerforce clutch, more to come