What is wrong with my truck!? It sucks to drive. Stalls out

From the beginning.

My battery has been getting weaker, and it finally took a dump on me. I woke up yesterday and it was dead. So I jumped it off drove it to the shop and replaced it with a new one.

It cranks fine now and the batter volts read 14 volts all the time, but now every single time I slow down to turn, or slow down to stop the truck dies on me! I have to power brake it everywhere I drive. Its beginning to get annoying. I was hoping it would clear up, but in the past day and a half it has dies probably 30 times on me. EVERY time I stop or turn, not just occasionally. Its not safe either, because i have the throw it in neutral with out power steering and crank it, then put it in drive.

Could it be the TPS? It runs fine when I give it gas, but not when I coast.

Please help guys. I need to get this fixed asap.

Maybe it needs to relearn the Idle fuel trims. Your cam and converter aren't very big do I'm hesitant to say it's that, but my truck has similar problems when it needs to relearn the fuel trims.

how long does that take? That never has happened when I swapped PCMs. Does the battery going dead kind of reset the computer?

You need to do the idle relearn. I think Allen has the procedure posted on his website on how to do it.

Didn't see it there. Maybe you can PM GasGuzzler and he can post the Idle Relearn Procedure on here.

If your throttle body has alot of carbon built in it and around the the throttle blade this can cause a low, or stalling idle also. Turn your key on, engine off, and get someone to hold down the gas pedal and then clean the throttle body out with a wire brush and carb cleaner. Itll have a difficult start for a minute, then run fine.

It hasnt thrown back any codes yet? JW

could it be the cooler weather. Mine started doing that a few times too...?

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Originally Posted by conekiller01

It hasnt thrown back any codes yet? JW

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No it hasnt

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Originally Posted by atruck

could it be the cooler weather. Mine started doing that a few times too...?

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Probably not I havent done any changes since last winter, and it is 85 right now and it still did it. Im going to try the relearn like Greg suggest.

Why did the battery die? Bad alt, or just old battery?

I may just need to play with my tune a little then. Good luck hope the relearn works for you.

http://www.ls1truck.com/forums/pcm-t...procedure.html

Hey! I know the guy that typed that in. :thumb:

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Originally Posted by RedHeartbeat

Hey! I know the guy that typed that in. :thumb:

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I thought Wheatley was Vortec350 on here.

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Originally Posted by Duct_tape123

Why did the battery die? Bad alt, or just old battery?

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It was old.

There is no idle learn procedure LOL.

A previous post nailed it and I actually fixed one today...2003 Tahoe electric throttle I replaced a battery on yesterday came back today surging idle and dying at stops and high loads.

Throttle clean sends them on their way.

Do you have access to GM STG 16013.00-2? It is listed in there. I copied it verbatim from the GM training document.

I have no idea what that is...the nomenclature is unfamiliar. Back in the PROM days we needed to relearn idle on vehicles with ISC and very rarely with IAC but not in the last 15 or so years for the most part. Did you get that out of the same manual as the 4L80 pin-out? :spit: :ma:

:LOL:

No, that was a crappy ATSG manual. The other was from a GM ASE training manual GEN III V8 Specialized Engine Rapair manual. Published by the Service Technology Group, General Motors Corporation, Warren Michigan.