Jump to content
  • Sign up for FREE! Become a GM-Trucks.com Member Today!

    In 20 seconds you can become part of the worlds largest and oldest community discussing General Motors, Chevrolet and GMC branded pickups, crossovers, and SUVs. From buying research to owner support, join 1.5 MILLION GM Truck Enthusiasts every month who use GM-Trucks.com as a daily part of their ownership experience. 

Sign in to follow this  
Medic610

6.0 question

Recommended Posts

Hi all. 
 

I new to the forum. I have a question about a 2011 3/4 ton 6.0. I’ve had this truck since October bought it with 70,550 on the odometer. I have 73, 558 on it now. Not real sure if this belongs here but here goes. 
 

So around 530 this morning I went to start the truck. It was  20 degrees outside and the hasn’t run since 745 pm the night before. So it was a cold start. 
 

Anyhow, it fired up just fine, then the tach dropped to 4-500 rpm it sounded like it was wanting to die, then immediately shot up to 2000 rpm then came back down around 1100. The truck warmed up and it seemed fine after that. When its at temperature it seems to run fine. It was that initial start that has me concerned. The truck didn’t throw any codes or anything. 
 

Im leaning toward injectors and was going to get fuel injectors cleaner tomorrow. Has anybody experienced what I’m describing, and or any other things I should look for? 
It’s my only ride right now so any and all advice/comments will be appreciated 

 

thanks!

92F1B73F-2B17-44AA-A355-6A9BB6DACF43.jpeg

Share this post


Link to post
Share on other sites

Take a look at throttle body,need a cleaning?

Share this post


Link to post
Share on other sites

Maybe. Like I said I pickEd it Up in October from a dealer. I know it was sitting there a while. It only did it in cold weather. Last night was 30 some degrees and started no problem. It was a cold start then too

Share this post


Link to post
Share on other sites

Injectors is the very last thing that comes to mind.

 

Clean the MAF and throttle body just because. It may never do this again for all we know.

Share this post


Link to post
Share on other sites

tps is going out?

you scan it yet?

Edited by flyingfool

Share this post


Link to post
Share on other sites
On 1/25/2020 at 1:03 AM, flyingfool said:

tps is going out?

you scan it yet?

Didn’t scan it yet. Never threw a code. But I think it is the throttle position sensor

Share this post


Link to post
Share on other sites

Well, you are certainly free to throw parts at it and hope, but I would suggest actually doing some diagnosis to figure out what the problem might be.

 

And how do you know it has "never threw a code"?  It can generate all kinds of codes without turning on the CEL.

Share this post


Link to post
Share on other sites

Join the conversation

You can post now and register later. If you have an account, sign in now to post with your account.

Guest
Reply to this topic...

×   Pasted as rich text.   Paste as plain text instead

  Only 75 emoji are allowed.

×   Your link has been automatically embedded.   Display as a link instead

×   Your previous content has been restored.   Clear editor

×   You cannot paste images directly. Upload or insert images from URL.

Sign in to follow this  



×
×
  • Create New...

Important Information

By using this site, you agree to our Terms of Use.