January 28, 2006Just looking for a bit of help. I have a 2000 Dakota with the 4.7L engine and 5spd manual transmission with 152,oooKm. Ive noticed since late fall that my gas mileage has been going down hill. I replaced the spark plugs just before Christmas and it didnt seem to change anything. Im only getting about 130km on about 40 liters of gas which costs me about $40.00. Now that its winter I do let the the truck ilde for about 5 or 10 minutes to allow the engine to warm up. Thats about the only change to my driving habbits. This isnt my first winter with this truck and I do realize that gasoline changes formulation for the winter. If anyone has any ideas of what may be the problem or something to go look at to try and figure this out it would be greatly appreciated.
January 28, 2006Is the drop in mileage the only thing that has changed? What I mean is, have you lost power, or is it harder to start in the morning?
I had a big drop in mileage on my 4.7 and turned out to be fuel pump. Accompanying symptom was that it was harder to start in the morning.
January 28, 2006Hmmmmmmm..... That could be the answer to another 4.7 owner I know that is having Mileage issues as well..
January 29, 2006my guess is fuel pump, fuel filter, or something with the fuel line. Could also be a Vaccum leak. I have an '02 dakota and in winter i get about 15-16 mpg in summer i get around 19-20 mpg