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Showing results for tags 'air/fuel mixture'.
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Hey guys, I need some help. Recently my only vehicle, an 03 2500hd 6.0 4x4 started to hesitate during start up. It bogs down as if it sounds like it is not getting any fuel when i step on the gas. Instead of revving up, it sounds as if it is choking on too much air, and no fuel. I changed the oil, filter, and air, and filled with gas from one of the two gas stations I always fill at. I have owned this truck most if its life, 11 yrs and 180k+ miles on her. When it started doing it the temperature outside was about 45-48 degrees, and I was coming off a graveyard shift. At the same time, it was choking and struggling to stay running, the computer (dash gauges and info center) also started freaking out and throwing messages “change engine oil” and “oil life reset” and “loss of engine power”. Once it quit, the distance to empty now was not reading the same as it was when i shut it off at midnight. In fact about 70 miles less, and the gauge still said full. Once it was “stable” to drive home, on one of the hills i was climbing, clearly the motor was loosing power, tranny wasnt downshifting, and loosing speed quickly, and some hesitation. However at the top of the hill, it ran just fine. Fast forward a day, started fine, ran fine. Next day, changed some bushings on the lift, drove into town just fine. When I left the store, started just fine, backed out and started to to proceed to the exit, and it started hesitating again. Cleared up after about 10 seconds, then on my merry way again. Got to the house, luckily, and it started the whole cycle over again. Throttle response was all but gone, sounded as if it was bogging or flooding the motor with air, but under idle struggling to stay at running, and choking, rpms are below 500 when it does it. Once I get the motor to stabilize with the feathering if the throttle, i can put my foot into it and it revs just fine. Computer still shows 187 mi to empty, when it was 265. The things I have done to this truck since I have owned it are, new (used) transfer case, new front end ( multiple times) , new (reman) dash gauge cluster, change plugs, water pump, k and n, batteries, window regulators, new climate control unit. I hope you guys can help, before having to ATTEMPT to take it anywhere.