avalanche tryna cut off
 

i have a 2003 avalanche z71 it start up fine but every time i put it n drive it start to act as if its going to cut off on me then it start running back ok in like 30 seconds i changed the fuel filter thinking that was the problem when i start to drive it cut off before i can make the block but then start right up with no problem can any 1 help me.

When is the last time you had the throttle body cleaned?

never i just gotten the truck how do i clean it i like to do my own work if i can

It's a very easy procedure. Just get an aerosol can of throttle body cleaner and take the intake tube off. You will see all the black carbon built up in there. Personally I like to remove the entire throttle body, but most people just clean them on the truck. A small toothbrush comes in handy for the tough stuff. Get it as clean as possible especially where the throttle blade meets the inner wall of the throttle body. Good luck and let us know how it works out for you.

i will thanks alot i will get on it first thing tomorrow

that wasnt the problem im thinking its my idle air control valve or its a bad sensor any1 want to put there in put into it

ok i checked my throttle body it was clean same problem

I assume you don't have any codes popping up.

not to my knowledge but how do i know if i have any codes my check engine light is not on

Does it work...when you turn the key on it comes on and turns back off?

yes it works when i turn the key forward but gos off when i start the truck

How long has it been acting up? Could you have gotten some bad gas?

about a month but if the gas was bad it should run bad a the start up to because at start up it sound like a champ nuttin but as soon as i put it n drive are turn on ac while in park it run bad and voltage meter drop to 6 volts then comes back up in about 30 secounds.

i changed my plugs and wires but still the same problem i notice when i give it a lot of gas it dont cut off while in drive i was thinking something is sticking so i pulled off my alternator and brought it to auto zone the guy said it pass but it was turning very slow so do u think it could just be the alternator turning to slow when n drive .

i changed my alternator and still the same problem help please????????????????????????

how many miles on the truck? when was the last time you changed your fuel filter?

truck has 108000 miles and i changed fuel filter last week end

ok today i put a meter on battery before start up its 12 volts after start up its 15 volts so then i left truck in park and ran the ac truck voltage drop and started to kill on me any1 want to add there in put

im still waiting on some more input

May sound silly but have you checked all your ground points on the truck.

cutin out
 

hey, did you ever figure out what was wrong with your avalanche? i'm starting to have the same problem! mine runs fine tho, when started drives fine but just cuts out while driving! each time i had the ac on! you said there was a voltage drop? when ac was on? maybe a bad connection some place? hey let me know! thanks james:cool:

still working on that problem but i think its my iac or tps

Have you tried cleaning the MAS? I know that you already changed the fuel filter, but maybe the sock filter is collapsed or clogged making it starve for fuel. That is what my mother's Astro Van did even after we changed the fuel filter.

thanx ima try that

still shutin off
 

i was wondering if anyone figured out the problem yet? my avalanche seems fine til the really hot days when i havta run the AC for a period of time! appreciate any help