Hi great forum.
Got a question on 05 2500 6spd. During nomal driving conditions when you press the clutch in and let the engine come down to idle as coming to a stop the engine bogs down to 600 rpms for a second and then back to 800 rpms normal idle. Truck runs and drives great other wise. Has any one experianced this before. Dealer says no problems/codes but I feel some thing is wrong. Please help me.

 

Does it do it without the AC on? If not then check your AC it may be overcharged or have a blockage.

 

It does it with or with out the AC on

 

Is you air cleaner clean? Does it do it if you are in neutral?

 

Best question yet.
If it tries to creep forward when the engine bogs down it could be a throwout bearing on the way out.

 

It's emissions related: When you push in the clutch and let off the fuel, the computer cuts fuel immediately, and by the time it registers you're at normal idle speed, it's fallen below and has to "catch-up" if you will. My '02 and my '04 both do (did) it, as has every other manual 2nd-gen or newer that I've driven.