my 2005 4.0 ranger is acting up. the truck will be in park and the idle drops from what i guess is 650rpm down a little, sometimes down to 500rpm when it does this the truck snakes a little, it does this in gear sometimes.

pat
p.s. i wish ford would bring back the flathead as a crate engine

 

So you could put one in your Ranger? The little 60 might fit pretty easily...

Oh, sorry, got me off track there! Have you checked for codes? Usually an idle problem is caused by the IAC, but with the...(is that snake or shake?) that you describe, I'm thinking maybe a dirty injector or ignition problem that's causing a slight miss.

 

Assuming you haven't exceeded 36K miles, I would make your problem the dealers problem. Gotta love warranties .

 

shake is what i ment
pat

 

well i took my truck into the dealer they did what they do, it turns out i had water in my gas. put in a additive problem fixed
pat

 

im having the same problem.... i thought about the water in the gas thing... maybe i should try additive... hmmm

 

yeah during the winter i make sure i atleast add 1 bottle every 3 fills to make sure everything is set. specialy if I spent the week doing short trips