My F150 idles up and down, plus getting 7 mpg
Hey guys, sweet board here, I have been lurking for a while.
My truck, 88 F150, C6, 351, I have been having a problem with the truck surging up and down, mostly at lower rpms, near idle, and normally after it is up to operating temperature. I have cleaned the IAC with no luck, could this be completely shot? and is there a way to check it?
I have replaced fuel filter, plugs, wires, cap, rotor in search for a solution. I am also getting 7 mpg, combination highway/city driving, I thought whatever is wrong may also cause bad mpg, I am expecting to get maybe 10 mpg, am I far off? It kind of sounds like the fuel pump is actually surging as well, I am planning on doing both tanks (they both leak a little) and pumps.
Thanks alot, sweet board!