Originally Posted by EricTheOracle
Sigh. New people.
Yes, it is a misfire. Condensation from the intercooler causes a misfire. Feathering the throttle allows the engine to draw the condensation in slowly enough to avoid kicking into a limp home mode. Eventually enough misfires clog the cats, resulting in a drop in power.
The first thing that you'll notice is that the check engine light will come on while idling as the ECU notices a flow through cat problem.
Eric.....First off let me start by letting you know I have read MANY posts on shuddering and misfires. As iFord has stated I might have bought my truck recently but have been on forums for quite awhile. I have frequented another forum for years before buying my truck...and decided to give this forum a try not too long ago.
Now...my issue is not a CAC issue...it feels just like going over rumble strips when coming to a stop and I also feel some vibration at speed around 55 mpg. I also get the shudder when lightly accelerating in 4th gear through town. I do not feel any misfiring during idle or any type of stumbling during idle.
Where I do appreciate your response...starting your response with sigh ..new people is really not needed.
13Harleyfan...That is possible that they will not check them. I will ask the service manager if he will have them checked. I was just wondering of the possibilities of this actually being the motor stumbling at speed and causing what feels like a vibration.
iFord...thanks for your reply and defense...lol Yes I did see the video and I did see the actual wobbling of the driveshaft. Mine is a one piece...but it sure made me think about getting my own GoPro camera and mounting it to see if it does the same thing or not.
PRNDL...I will look up what you did...thanks for the reply.