4 cyl. 5 speed autmatic trans. Extended cab.
the problem I am having is. I have lost at least 4 mpgs. I have changed plugs & wires, air filter, fuel filter.
What it does every time I get under a load going up a hill. Even if I do not down shift, but especially when I down shift air comes through the air vents on the dash. It does not matter what I have the heater control on. I can even have it shut off it still happens. I have had the truck about a year. It had 70,000 on when I got it. This just started happening in the last threee months.
Wednesday, January 4th, 2012 AT 12:01 AM