Hey guys, it snowed like 5 inches here. So I cleared off the truck, cleared most of the driveway. Then I moved the truck onto the clean part, shut it off cleaned off where the truck was, then I moved it back and shut it off. Then I decided I wanted to go see what the roads were like. So, I get in, start it and it idles for like a second or less and shuts off. I tried again just to see if I wasn't holding the key long enough and same thing. Next, I started it and held the engine at about 3,000 rpm for a minute or so. It seemed fine while I was holding it, then once I let off it shut off. I popped the hood to check things out, saw nothing, then got back in, started it and magically it ran. Took it for a ride, and it seemed normal. Once I parked it, I shut it off and restarted it just to see, and it did idle, but the idle was gradually lowering until it leveled off at about 500. My usual idle is around 750-800. Oil/temp/oil pressure are normal. The only thing is I have to replace the fan clutch still, because it's always on. I've got it but haven't put it on yet. What do you guys think the problem could be?

 

codes? could be a fuel pump, do you hear it buzzing when you turn the key?

 

Sounds like a sensor. Possibly the Idle control valve sensor or something like that. Not sure what it's actually called.

 

lol why was i thinking fuel pump, yea check your IAC or TPS

 

Just put the code reader on, no codes at all. I do hear the buzzing, so I don't think it's the fuel pump. I have been starting it a few times and now its starting, then it goes way way down to like 300 or 350 to where its barely idling and then it will rebound. The only reason I think it's even staying running now is because I had it running just a little while ago. So if I start it in the morning it will probably start and shut off unless I hold the gas. Do you guys think there might be a cracked vacuum hose or something? And i'll look into the idle control zanethan

 

Lol yeah I don't know what you were thinking I just went along with it

 

my money would be on the iac or tps. and just double check the hoses.

 

I know what youre talking about... I just don't know this truck well enough yet to have looked at the IAC or TPS so I'm not really sure where theyre located at. I'm sure I could find the TPS but I'm not sure about the IAC. Sorry if I sound like an idiot, lol.

 

im guessing you have the 3.9?

 

...sadly... Haha well it does alright. But yes it's the 3.9.