cold start shutter and stall

sierra4.8 · Nov 18, 2014

my 2002 sierra 4.8 started up fine this morning but when it began to idle down it started sputtering then it died i started it back up and it did the same thing again started it a third time and gave it some throttle and kept the rpms up and it ran fine after a few seconds it was really cold this morning too any one know what i should be checkin first? anyone ever had this problem? fuel pressure? plugs and wires? iac? tps? maf? dirty throttle body maybe?

Bonecollector · Nov 18, 2014

sierra4.8 said:
my 2002 sierra 4.8 started up fine this morning but when it began to idle down it started sputtering then it died i started it back up and it did the same thing again started it a third time and gave it some throttle and kept the rpms up and it ran fine after a few seconds it was really cold this morning too any one know what i should be checkin first? anyone ever had this problem? fuel pressure? plugs and wires? iac? tps? maf? dirty throttle body maybe?

How cold was it? Did you plug it in?

How much gas you have? When's the last time you had a tune up?

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burgundybeast04 · Nov 18, 2014

sierra4.8 said:
my 2002 sierra 4.8 started up fine this morning but when it began to idle down it started sputtering then it died i started it back up and it did the same thing again started it a third time and gave it some throttle and kept the rpms up and it ran fine after a few seconds it was really cold this morning too any one know what i should be checkin first? anyone ever had this problem? fuel pressure? plugs and wires? iac? tps? maf? dirty throttle body maybe?

Clean maf and throttle body. Almost guarantee that's what it is.

If that was the problem, Gm dealers offer a motorvac carbon cleaning service for your fuel injection that makes a world of difference. costs a couple hundred.

Sent from Team Sierra

sierra4.8 · Nov 24, 2014

I cleaned the throttle body (wasn't dirty ) I cleaned it when I first got the truck a few months ago it was about 20°f out and no its not plugged in it has no heater and today when it was warm out it started hard I had to give it gas for it to start but the feul pump sounds fine and it doesnt seem to starve for gas on acceleration or anything