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Idle bogs on deceleration to stop

Lftwfls

By Lftwfls
in Troubleshooting & Recalls

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Lftwfls Enthusiast

Lftwfls

Posted
Posted

Hello All,

 

Problem: The idle feels like it bogs down when rolling to a stop, and applying the brakes firmly. (that last 10 feet of braking) I believe it may be when cold only.

 

Background: I bought a used 2018 Silverado 1500 double cab LS 4x4 with 100,000 miles. I drove it without issue for a few months, and then started doing the 100k miles services myself. So far I have changed the oil, the differential fluids, the trans fluid, and transfer case fluid. I have not yet changed the spark plugs.

 

I saw online that it might be the Idle Air Controller? If that is the case should I purchase a scanner to see if there are air/fuel mixture codes? It is also possible that this is not a flaw and just a random hiccup.

 

 

Lftwfls Enthusiast

Lftwfls

Posted
  • Author
Posted (edited)

@steelerdude15 I also forgot, it could be an excessively dirty intake butterfly? My truck was used on lease roads in Texas. The dust was so thick in the interior I had to use rubbing alcohol to get it off the plastic.

 

I will take that apart today to see.

 

Edited by Lftwfls
Salsa De Piña Enthusiast

Salsa De Piña

Posted
Posted (edited)

You're on the right track.  Pull the throttle body and give it a good cleaning.

 

I had a Canyon that did this every few years, and it got worse in the winter time.

Edited by Salsa De Piña
steelerdude15 Enthusiast

steelerdude15

Posted
Posted
6 hours ago, Lftwfls said:

@steelerdude15 I also forgot, it could be an excessively dirty intake butterfly? My truck was used on lease roads in Texas. The dust was so thick in the interior I had to use rubbing alcohol to get it off the plastic.

 

I will take that apart today to see.

 

I’m not sure, but it could be.

steelerdude15 Enthusiast

steelerdude15

Posted
Posted
6 hours ago, Salsa De Piña said:

You're on the right track.  Pull the throttle body and give it a good cleaning.

 

I had a Canyon that did this every few years, and it got worse in the winter time.

I clean my throttle body every 12,000 miles when I change my air filter. I have less than 1,000 miles to go before it has to get cleaned again. I’ll clean it and report back if it took care of the issue.

  • 4 weeks later...
diyer2 Senior Enthusiast

diyer2

Posted
Posted

Regular use of a fuel system cleaner should help. All my motors get it.

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