poor fuel economy after rebuild
#1
Race Car
Thread Starter
poor fuel economy after rebuild
I'm about 800 miles into a full rebuild of the engine and I'm getting terrible fuel economy. I've got Vitesse MAF chips (55# injectors), LR stage II MAF, and the LR fuel rail with adjustable fuel pressure regulator. I've set the fuel pressure to 3 bar at idle, and I've zero'd out any adjustment to the MAF signal in my PowerPerfect (just running the Vitesse map). It smells a little rich, but not TOO bad, and I'm really staying out of boost pretty well. Unfortunately, I'm only getting about 16-17 miles per gallon. Is this typical of a fresh rebuild? Has my O2 sensor bought the farm? Should I just hurry up and get to a dyno to find out how rich I am?
#5
16-17mph on the highway, or city/highway? Sounds about right to me, given the mods, if you are talking city/highway driving. Don't switch to a S2 r&p, or you'll *really* see your gas mileage go down! lol
Regards,
Regards,
#6
Addict
Rennlist Member
Rennlist Member
get you a WBO2 so you don't have to go to the dyno.
I think your foots heavy you're just telling yourself it's not...that quick rush, pin your back to the seat
I think your foots heavy you're just telling yourself it's not...that quick rush, pin your back to the seat
#7
Race Car
Thread Starter
mods and rebuild at the same time, fuel pressure set with the vacuum line disconnected, didn't touch the fqs, mileage is city/highway (but definitely more highway that city). Ski, I got on boost 3 or 4 times to set the MBC, no heavy foot other than that (I think).