Guys,
I've been having a problem the last few days with starting my L and keeping it running. On Monday and today, it would start up, but I had to put my foot in the gas to keep it going. The RPM's upon start up would quickly go down right after I turned the key, then the truck would shut off. To keep it running, I have to give it a little gas. After running it around for a while and then stopping to see if it still gave me trouble when starting, it would be fine.

On this past Sunday, I installed my "everyday tune" I got from RWTD on my Predator. And, I changed my fuel filter 3,000 miles ago.

What do you think is the problem?

 

check your IAC. if it hasnt been cleaned in a while you should probably clean it. its really simple all you need is some carb cleaner and some q-tips.

 

did you do any work under the hood ?

check for a vacuum leak -

 

No work done under the hood. I will try cleaning the IAC....

 

Did you try going back to the stock program and see if you still have the same problem? Have you used this program before without issues? If so is it possible it didn't load correctly. Ie your battery was low or something like that? If not used before and the stock idles fine then my guess would be something is wrong in the program or it didn't load good the first time if the above fails. Also could you have a loose vacuum hose somewhere? Check the three that goes underneath the tube right in front of your throttle body.