What is this?

[RPFloyd]

Can someone please tell me what this is. I'm having the throttle issue and when looking at my truck I see this thing and a little cylinder down at the bottom looks like it should be resting fully but it's not. Is this normal?

 

[BTdriver]

That looks like the vacuum pot controlling the EGR flow valve. You're right, the bushing in the eyelet has failed causing a lot of play. Looks to me like it's causing the valve to be open a little more than it should, allowing some extra exhaust gas into the intake.

 

[RPFloyd]

Thank you I'm gonna replace it today. I'm getting the electric throttle see dealer message. Maybe this will fix it

 

[Ninob1231987]

Thank you I'm gonna replace it today. I'm getting the electric throttle see dealer message. Maybe this will fix it

Can let me when u get fix. My truck doing the same.

 

[Detritalgeo]

Can someone please tell me what this is. I'm having the throttle issue and when looking at my truck I see this thing and a little cylinder down at the bottom looks like it should be resting fully but it's not. Is this normal?
View attachment 4463

Old thread... but...
That is the vacuum actuator for the high pressure EGR cooler bypass valve. From what I read it opens up during a cold start to get the engine up to temp quicker then is typically closed the rest of the time so that all EGR gas goes through the cooler passages.
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