Engine Runs Rough with Light Throttle Question

Engine Runs Rough at Light Throttle Question

Has anyone else noticed when driving down the road at speeds above 40 with light throttle pressure or with the cruise control on, there is a constant misfire that can be heard from the exhaust? I do not notice it very much with the MDS active with the crappy exhaust note, but when I turn the MDS off by selecting +8 it sounds like the MDS does not shut down all the way. And if I go to +7 or +6, the rpms rise and the misfire noise it still there but it is following the higher engine speed.
I drive on about 15 miles of new roads so I am not hearing the tires thumping on the road surface. And when I am driving at lets say 70 mph, and put the transmission in neutral, the misfire is gone 100%. And if I am stepping on the throttle picking up speed, or setting in the driveway in park and run the engine up and hold the rpms at a constant speed, it will run smooth as silk. It might be a bad MDS solenoid or lifter, but the dealer says at 8000 miles they can't be bad, and could not find any codes. Thanks for any input.

parts can be bad when they are installed. it sounds like a mds issue

tuned by jay greene

I agree that they don't come out of the factory totally ready to go. I'd have it checked out by the dealer under warranty.

Thanks for the replies, I have had it to the dealer, and they say nothing is wrong with it. Even when I told them it was running smooth until last week. Maybe it is time to go to another dealer.

Ram Rebel said:

Thanks for the replies, I have had it to the dealer, and they say nothing is wrong with it. Even when I told them it was running smooth until last week. Maybe it is time to go to another dealer.

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Hi Ram Rebel,

Were you able to go on a ride along with the dealership, so you can make sure they understand what concern you've experienced?

If you did want to try a different dealership, there is a dealer locator on ramtrucks.com that you can use!

Kori
Ram Social Care Specialist