TERRIBLE mileage on my 5spd cummins!! 11mpg city!
#22
#25
Update on my mileage from previous post. Was getting 23mpg with the new fuel filter & cleaned pre-filter/strainer. Installed the BHAF last Friday and on this tank I got 24.665mpg. Then I'll see what happens when the exhaust gets opened up.
85_305, have you checked the wastegate's operation? If the wastegate isn't operating correctly or the actuator is out of adjustment, the fuel mileage could be affected as well, but usually with low power as another symptom. Gauges would help...low boost and high EGT's would tell you something.
85_305, have you checked the wastegate's operation? If the wastegate isn't operating correctly or the actuator is out of adjustment, the fuel mileage could be affected as well, but usually with low power as another symptom. Gauges would help...low boost and high EGT's would tell you something.
#26
Well I put a new starter in teh other day, and I also put in my fuel plate and afc work (see sig), new fuel filter, and straight piped my truck. Next mod is the bhaf (air filter in it now is dirrrrty.. its ragged) and boost elbow. I'll see how mileage is just with the new mods and report back, but be forewarned my first tank on the 'plate is getting ragged pretty good I cant believe how nasty this truck is with a 30$ plate, and the afc and plate aren't even full forward yet until I get the gauges. I cant wait to get my boost elbow and put the afc and plate ff though, talking about excitement!
#27
#29
Heh, it's hard to get good fuel mileage when you can't keep the -eatin grin off your face and the go-pedal on the floor! Those mods on your truck probably woke up a sleeping beast. I know when I had my '97 5-spd dually and did the fuel plate, exhaust, bhaf...i felt like I was driving a new truck and probably got about 10mpg for the first few tanks until the excitement wore off! Even after those mods, it still got 26mpg best, 22mpg avg, and 19mpg hooked. I loved that truck
Last edited by Benjamin; 03-24-2010 at 11:36 AM.
#30
yeah i'm sure comparing a common rail to 12v is a bit outrageous, and 22 is going downhill at 75mph for 150 miles running at 1700rpm, 3.73's and 40" tires makes for low cruising rpm's, but usually i get 17-18 on the interstate and 11-15 around town, i'm not gonna complain though, it's better than a gasser and alot more fun