I have a 02 QC 4x4 4.7 liter. At my work I will drive a company truck for 7 days before I drive my truck again. Everytime after those7 days I have to jump my truck off. The last time after I jumped it off it took a long time to start. When it finally started it didn't want to idle. After 10-15 minutes of me keeping my foot on the gas it started to idle on its on. The truck is running fine now. Has anyone experienced this or do you guys have any idea what is happening.

Thanks,

Darren

 

I left my truck sitting for 2 weeks, came back jumped in and it started right up. It was alot louder at first, but it did start.

 

Have your battery and alternator checked. Autozone or Checker will do it for you for free, even while still on the truck.

 

I had this exact same thing happen to my wife's car years ago. I replaced the battery (twice) and the alternator. Nothing worked. I took it to a shop (twice)and both times they checked the system and assured me that everything was working as it should. None-the-less, if the car sat for more than a day it would be dead as a door nail. I finally got so angry that I took it to the Volkswagendealership where we had purchased it (used / as is) and told them that if they couldn't fix it I was gonna take them to court. An old man was standing nearby and overheard our conversation, he walked over and calmly said "I know how to fix it". I was in no mood and said "I doubt it Pops. I've tried everything". He said "Let me give it a shot." I handed him the keys and we followed him out to the car where he went straight to the trunk, popped it open, reached in and flipped a light switch that I didn't even know existed. He looked up and said "It's fixed". My wife laughed at me all the way home!

The point is, it's probably something very simple. Possibly the light under your hood not shutting off after you close it. Somewhere there's a drain on your system and it's just a matter of finding it.

 

do you guys have any idea why it wouldn't idle?

 

It's the battery. Our trucks won't run on a dead battery after they have jumped unless, like you said, you raise the rpm's.

When you raise the rpm's, the voltage goes up because the alt is putting it out a little higher. Our pcm's need a minimum amount of voltage or all the sensors are off, etc.

But it wouldn't be a bad idea to have the alt checked for the proper charging voltage, after you change the battery.