Just purchased this 99 F-150. Has 120K miles on it. Runs like it has 20 miles on it. RUNS BEAUTIFUL. Yesterday when I went outside to start it, for some reason it would turn and crank over awesome, but it seemed like there was no gas getting to the engine to ignite the start up. What do you guys think it is. Gas is fine, always buy gas at the local Mobile, so I know it wouldnt be bad gas. Sounded like it wanted to start but it just wouldn't turn over. I went back out to the truck like 15 minutes later and it started right up. temperature is around 35 degrees, so lines arent frozen, tank is like 1/2 full??? Battery is brand new!

Any help, would be great. I am thinking spark plug or wires?? Could I be right?

 

I would try cleaning the IAC. They are know to stick in cold weather when they get some age on them.
Next time it does it, try holding down the gas pedal about 1/2" and see if it will start that way. If so, the IAC is failing.

 

Where is it located, and how and what do I use to clean it? If you possibly have a pic as to how to do this, I would greatly appreciate it

 

There are pictures of the location in my gallery under 2001 info and stuff.
https://www.ford-trucks.com/user_gal...4&albumid=4956

Read Q#3 about the IAC.
https://www.ford-trucks.com/forums/s...d.php?t=141432

Jimmy

 

Here's a link to a posting for an Explorer ... I suspect that the F150 is very similar!

https://www.ford-trucks.com/article/...r_IAC_Fix.html