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Car Forum / Dodge / Dodge Trucks / April 2008Fuel economy on 01 Cummins
I have a friend who owns an 01 3500 w/ Cummins that is asking how he can get better fuel mileage. He currently gets about 13mpg. The truck is an AT w/ 4.10 gearing. Since my 00 gets 19.5mpg or so, I'm not much help in solving the MPG problem, since I don't have it. Anyone have any tips?  SignatureMax "Everyone is entitled to his own opinion, he is not entitled to his own facts." Sen. Daniel Patrick Moynihan of New York > I have a friend who owns an 01 3500 w/ Cummins that is asking how he > can get better fuel mileage. He currently gets about 13mpg. The truck [quoted text clipped - 3 lines] > > Anyone have any tips? A bad IAT sensor can kill the fuel mileage without any other symptoms. SignatureKen That should have a code set IIRC, but will the dash read out have it? Also, I'm assuming from what you say, the truck will run fine otherwise? SignatureMax "Everyone is entitled to his own opinion, he is not entitled to his own facts." Sen. Daniel Patrick Moynihan of New York >> I have a friend who owns an 01 3500 w/ Cummins that is asking how he >> can get better fuel mileage. He currently gets about 13mpg. The truck [quoted text clipped - 5 lines] > > A bad IAT sensor can kill the fuel mileage without any other symptoms. > That should have a code set IIRC, but will the dash read out have it? > [quoted text clipped - 4 lines] >>> is an AT w/ 4.10 gearing. Since my 00 gets 19.5mpg or so, I'm not much >>> help in That 4.10 does not help. He has to turn higher RPMS to go the same speed as everyone else. On my 2000 2500 with 3.73 rear end I got 21 highway. With the stock 3.53 was nearly 25MPG >>> solving the MPG problem, since I don't have it. >>> >>> Anyone have any tips? >> >> A bad IAT sensor can kill the fuel mileage without any other symptoms. > That should have a code set IIRC, but will the dash read out have it? > > Also, I'm assuming from what you say, the truck will run fine > otherwise? It sometimes doesn't set a code. It can run fine otherwise. See: http://www.dodgeram.org/tech/dsl/sensors/IAT/clean.htm SignatureKen Good info, I'll pass it along. If the 1.9 mpg improvement that Marco got (link on Fritz's site) is seen by my friend, he'll definitely be happy. SignatureMax "Everyone is entitled to his own opinion, he is not entitled to his own facts." Sen. Daniel Patrick Moynihan of New York >> That should have a code set IIRC, but will the dash read out have it? >> [quoted text clipped - 3 lines] > It sometimes doesn't set a code. It can run fine otherwise. > See: http://www.dodgeram.org/tech/dsl/sensors/IAT/clean.htm >I have a friend who owns an 01 3500 w/ Cummins that is asking how he can >get better fuel mileage. He currently gets about 13mpg. The truck is an AT >w/ 4.10 gearing. Since my 00 gets 19.5mpg or so, I'm not much help in >solving the MPG problem, since I don't have it. > > Anyone have any tips? How many miles? Is it a dually? 4X4? If so, around town it probably is what it is. Roy > Max > > "Everyone is entitled to his own opinion, he is not entitled to his own > facts." Sen. Daniel Patrick Moynihan of New York Its a dually, thats all they had in 01 3500's IIRC. Its 4x4, but then so is mine, and I'm pulling 19.8 avg on trips, where he's doing a best of 13 on trips. SignatureMax "Everyone is entitled to his own opinion, he is not entitled to his own facts." Sen. Daniel Patrick Moynihan of New York >>I have a friend who owns an 01 3500 w/ Cummins that is asking how he can >>get better fuel mileage. He currently gets about 13mpg. The truck is an AT [quoted text clipped - 11 lines] >> "Everyone is entitled to his own opinion, he is not entitled to his own >> facts." Sen. Daniel Patrick Moynihan of New York |
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