Hey all. Im brand new to the forum, and i have a 2011 Silverado 2500hd with 73545 miles on it. I picked it up used in October with 70550 mi on it.

Right now It’s about 20 degrees in Pennsylvania Anyway, I went to start the truck and it fired up no problem then the tach dropped down to about 500 rpm, and I noticed a difference in the motor like it wanted to die. Then. It immediately kicked up to around 1500-2000 rpm. It only did this when initially started it. Cold. Otherwise the motor runs fine.

Could this be an injector issue?. I was going to go out later for injector cleaner, as I’m not sure when they maintained last. Any and all advice would be helpful thanks!

 

I’ve this happen before, no check engine light on. I’m thinking it’s just a random computer quick rpm drop, not related to a misfire or injectors issue

 

is this a warning sign that the computer is going out on me?

 

doesnt sound like a computer problem. could be a signal issue somewhere but clean the MAF with the proper cleaner and run some injector cleaner. dont just add 1 can to a 1/4 tank of fuel if it say 1 can for 20 gal then do that

 

I bought some gum out injector cleaner. I just followed the directions. I never messed with injectors or anything give me a carb and we’ll be good. Anyway we’ll see what happens. Just need it to get as cold as before