trever1t

iTrader: (14)

i have no problems in the cold/hot/lukewarm. clsd. Are you guys Open Loop?

Sambo53

iTrader: (3)

I have no idea man. Just kinda strange it was working good until it got cold as hell.

TurboBerserker

iTrader: (1)

This is not an SD vs MAF nor an OL vs CL problem.

This is an idle problem. Allen can't tune your idle for cold temps properly -- nothing wrong with his skills, but the SA temps don't go low enough... All you need to do to fix this is scan it as already mentioned.

GMCtrk

iTrader: (27)

just curious, how cold does it get in norcal?

trever1t

iTrader: (14)

here it gets low 30's. Last year when i went from Reno over the pass into Tahoe a bit colder

I've driven in snow country and high altitude without issue but I could definitely feel a huge power loss at altitude.

KySilverado

iTrader: (7)

SD for a couple years now. Temps range from 0 to 100. No issues. I agree its not SD it's probably in the Idle airflow tables and being wrong for the lower temps.

Sambo53

iTrader: (3)

Yeah, im not ******* his tuning skills. I had no idea I would ever have this truck in temps like this. What do I need to scan this? I dont have a data logger or scan tool or anything.

blazinblue

iTrader: (15)

Get in contact with kbracing96 he lives in WY he can tune your idle problems

MNC5

Humm.. I've now driven mine in 90+ temps and below zero without the MAF AFR is fine. Your tune must not be setup properly.

montecarloss

iTrader: (18)

have them check your fuel pressure.i seen this symtoms before and was the fuel pump and or the the fuel pump hose sucking air.making it load up at idle and then leaning out at wot.