Better gas mileage please!
#11
02-07-2010, 04:36 PM
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#13
02-07-2010, 05:36 PM
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Join Date: Oct 2009
Location: Buffalo, NY
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#14
02-07-2010, 05:53 PM
Fix the plenum(do a search here) replace or gut cat and replace the post cat o2 sensor
I have a 1999 Ram1500 Sport, 5.9L, automatic, 2wd with 230K+ miles.
235/70/16 Firestone Dueler AS tires at 45psi
Gutted my catalytic converter after replacing it for the 4th time!
Raven (Midas) muffler and all else stock.
I have been getting better and better mileage this year after gutting the cat. I'm sure I'll be replacing it again, but for now I'm enjoying the great mileage. I drive 60-65mph on the Interstate and don't baby it much at all around town. I just finished a 1600mile trip towing a 1700 lb load on a single axle boat trailer and got 14.5mpg on the last 850miles of the trip.
DON'T use the cruise control if you want good mpg, I just keep my foot steady and let the truck slow down climbing hills and speed up going downhill.
235/70/16 Firestone Dueler AS tires at 45psi
Gutted my catalytic converter after replacing it for the 4th time!
Raven (Midas) muffler and all else stock.
I have been getting better and better mileage this year after gutting the cat. I'm sure I'll be replacing it again, but for now I'm enjoying the great mileage. I drive 60-65mph on the Interstate and don't baby it much at all around town. I just finished a 1600mile trip towing a 1700 lb load on a single axle boat trailer and got 14.5mpg on the last 850miles of the trip.
DON'T use the cruise control if you want good mpg, I just keep my foot steady and let the truck slow down climbing hills and speed up going downhill.
Your plenum is shot(do a search) . That's what ruined your 4 other cats.
#17
02-07-2010, 08:49 PM
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#18
02-07-2010, 11:30 PM
I am getting 7 city 12-13 hwy in my 1994 dodge ram 1500 4x4 Reg cab LB with the 360 auto. I have a bunch of upgrades but am still getting this awful milage. The truck has 285/75/R16 on it that are pretty worn down. The O2 sensor is about 3 1/2 years old. It hasn't had an alignent in a long time (no point when the steering is shot).
Mods:
Engine Mods:
K+N FIPK II, Ported and Polished Intake with Hughes plenum fix, Polished TB, 180 degree T-stat, Harland Sharp 1.7 RR, Summit CD ignition (not working), Taylor Cable Wires, Accel cap and rotor, Summit Shorty Truck Headers (cleaned up), Magnaflow Cat, Flowmaster collector on Y-pipe, duals out back
Drivetrain:
PosiLock on CAD, TCI Pro Super kit, Transgo Shift Kit, B+M trans pan, 5 pinion planitary, 30K GVW summit trans cooler
Suspension:
Summit 2in coil spacer, Suplerlift 2.5" AAL
It also has a headache rack, HD rear bumper (3/16 steel), tool box, and CB whip (108"?)
Is there something that I am overlooking that is causing the bad milage or am I just screwed? I have a feeling its the latter.
Mods:
Engine Mods:
K+N FIPK II, Ported and Polished Intake with Hughes plenum fix, Polished TB, 180 degree T-stat, Harland Sharp 1.7 RR, Summit CD ignition (not working), Taylor Cable Wires, Accel cap and rotor, Summit Shorty Truck Headers (cleaned up), Magnaflow Cat, Flowmaster collector on Y-pipe, duals out back
Drivetrain:
PosiLock on CAD, TCI Pro Super kit, Transgo Shift Kit, B+M trans pan, 5 pinion planitary, 30K GVW summit trans cooler
Suspension:
Summit 2in coil spacer, Suplerlift 2.5" AAL
It also has a headache rack, HD rear bumper (3/16 steel), tool box, and CB whip (108"?)
Is there something that I am overlooking that is causing the bad milage or am I just screwed? I have a feeling its the latter.
Last edited by Gerehead8; 02-07-2010 at 11:33 PM.
#20
02-08-2010, 05:26 AM
Legend