gas milage drops badly. plugs?
#1
gas milage drops badly. plugs?
hi gang, it's been a few weeks now (noticed it also when we got it back from dealership a few months back) that the gas milage has dropped. Yesterday morning, i had a full tank (neddle on F). i was in bumper to bumper traffic for about 500meter stretch. By the time i got on the highway, it had dropped between 3/4 and full tank! quite a big drop and i wasn't even moving!
the truck now has 112 000 miles on it and i'm sure it has original plugs. Might it be taime to change them? anything else i should consider? thanks
fab
the truck now has 112 000 miles on it and i'm sure it has original plugs. Might it be taime to change them? anything else i should consider? thanks
fab
#2
#3
You didn't say what year but if its a Windsor engine (5.0 or 5.8) change the plug wires, cap and rotor while you are at it.
I really can't see it using 1/8 of a tank in less than half a mile unless it took you an hour or more to go that distance. If it was using fuel at that rate it would be running like crap.
I would be more inclined to think the gauge settled and it was just reading high when you started out.
I really can't see it using 1/8 of a tank in less than half a mile unless it took you an hour or more to go that distance. If it was using fuel at that rate it would be running like crap.
I would be more inclined to think the gauge settled and it was just reading high when you started out.
#5
I wouldn't go just by needle movement. You need to do the actual math to see if your MPG has changed. Have you calculated what it was getting before you noticed it seemed to be using more fuel? Fuel gauges aren't very accurate and they are dampened to keep them from bouncing. So it might stay at Full for a while even though you have used some fuel and then it will drop.
#6
The thing is, I can also feel it Performance-wise. Often when driving I can feel a kind of stumble or miss when accelerating. At wot, it's not that noticable. Mind you, we're in dead of winter and don't wanna kill myself, so haven't floored it all that much. Was thinking maybe camshaft position sensor?? I show no check engine light on dash.
#7
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Miss, no codes
Water in the fuel can cause a miss and not set codes; have seen em go putt, spit, spit, putt,, spit to PURR within 60-120-seconds by adding HEET to tank while running w/ known water issues in fuel
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