cwsartain

Yesterday I had to replace the factory battery in my 2011 F150 XLT Screw. This morning was the first time for me to drive it after the new battery. One of the first stop signs I rolled up to, the truck shut off, due to the RPMs bottoming out. It has tried to do the same thing a few more times when I drove it to lunch. I've noticed that while I do sit a red light and the truck is idling, it seems like it's idling lower than normal. It sits around 400 rpm. Then when I accelerate, the throttle response has lag.

The truck hasn't ever done this until I replaced the battery. I had the old battery out of the truck for about 2 hours before I installed the new one. With the cables disconnected for that period of time, did the computer completely restart and if so, does it have to re-learn all of the shifting points, rpm idle, etc? Or so do I need to take it somewhere to be set?

Thanks in advance for your help!

techrep

iTrader: (1)

I'm guessing the Alt...

thebreba

Your battery? Sounds like your alternator or something along those lines is having a hard time keeping your battery charge? Or can't keep up with it. Quire odd that it's just now doing it with the new battery... Have you tried putting the old battery in? (If it does still work). And seeing if you still have the same results?

cwsartain

It's not the battery at all. Is that the truck RPMs are bottoming out on and shutting down. The battery is not at all dying the batteries fully charged. The truck hasn't shut off anymore while driving it today. However the RPMs when I let off the gas pedal are dropping lower than They normally do.

RLXXI

While it is normal for the truck to perform differently than your used to due to the keep alive memory being erased by having the battery disconnected for more than 15 mins, it's not normal for it to die like you say, how many miles on this truck and what engine?
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cwsartain

It is 2011 with the 5.0. Has 76k miles.

RLXXI

Give it a little more time, (within 100 miles or so) and see if it clears up, back in the 90's-2k's they used to have an issue with the intake and throttle body getting gummed up from the pcv and egr systems. Could also be a dirty maf sensor. They make a spray cleaner you can use on both.


Follow the instructions included and that should perk it right back up.
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2014fiveoh

Try disconnecting the battery for 30 mins.

My buddies jeep has an idling issue after his battery died and he replaced it. Turns out, I think he pumped the gas when he tried to crank it, and the computer readjusting his idle setting.

Not saying you did anything wrong, but things happen.

cwsartain

Battery relearn process fixed it. Woohoo

Pacific Fisher

In these late model cars and trucks, I always maintain jumper leads to another battery when I change batteries so I do not lose any programming.