how to get good fuel milleage
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how to get good fuel milleage
ive got a 99 cummins ext cab long box. its lifted 4 inches on 35s it has the 3:55 rear end. stock transmission. what upgrades could i do to get better fuel mileage. ive hurd tuners, bigger exhaust, injectors. not sure what to look for help me out if u can. thanks
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If you dont have a lift pump and gauges do it asap! Sounds like you have a auto in which case is good up to a few hp(around 60-70hp). You can run a full tuner on your truck(edge,quad ect) on a stock tranny but dont expect to be hard on it and for it to last forever. Once the tranny is built right then intake,exhaust,good tuner,small injectors will benefit you with a few mpgs. Your auto will have your mpgs lower and your 4in lift and 35's arent helping either. Im getting about 16mpg in town and 21highway im a 6 speed tho and 4.10's with 33's and leveling kit. I usually run with my edge on level 5 if I keep my foot out of it that usually results in the best mpg.
#6
Actually poor fuel psi will cause bad mpgs believe it or not. The reason why fuel pressure gauges are so important on these trucks is cause poor psi will kill the injection pump then you are looking at about 1,300.00 to replace it. You need to ditch the stock lift pump even if you dont plan to mod the truck at all. Good psi will keep the injection pump cool and also the fuel helps keep it lubricated. Either way gauges help you tell whats going on with your truck(fuel psi,boost,egt's and tranny temp if your a auto)
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