Hello guys! I own a 2010 Dodge Charger (V6). About 9-10 months ago, out of nowhere, my car started to vibrate at a very specific speed, 45-50mph. It would happen randomly, and it would only happen when I slowly pressed the gas pedal (but not all way). It should also be noted that if I ever fully pressed the gas pedal, or released it and pressed it again, the vibration would not occur. So it was as if the vibration had to do with a certain position of the gas pedal along with a certain speed of the car.

At first I just ignored it because the vibration was not that noticeable, but with time the intensity and frequency of it increased. A few months down the road, the vibration started occurring at speeds like 60 mph, or even 70 mph, but the most occurring point for it is still at 45-50mph. Now, this is where I got alerted and started paying visits to various mechanics to get things checked. We ran computerized tests, and we also tried to fix other issues which may or may not be related. So far, I have done the following:

• Changed the tires, they're brand new now
• Had the fuel injectors cleaned
• Replaced the rocker arms/bushing that was damaged
• Changed the gear oil and the differential oil
• Changed the mounting for the engine and the gear
• Had the throttle body cleaned
• Changed the Brake Switch (probably unrelated anyway)

But with my luck, the issue didn't totally go away even after doing all of that. Although, I would say that when I got the fuel injectors and the Throttle Body cleaned (this month), the frequency of this vibration problem dropped dramatically, but it is still there. The computerized diagnosis doesn't show any errors related to the engine, gear, or the throttle body itself. Upon my last visit, the mechanic at MOPAR said that there's a chance that the motor of the throttle body could be faulty. But since I've pretty much emptied my wallet fixing so many things, I didn't want to go with another suggestion without being absolutely sure that it's worth it.

Apart from the vibration issue, I think it's worth mentioning that I also feel some stalling when my car's idle and I slowly start to accelerate. It's only felt when, again, I press the gas pedal gently. Also, if I am driving at any speed, if I release the gas pedal and press it again, right after pressing it gently I would feel a very, very small jerk. As if something was preventing me from accelerating and it just got out of the way. That jerk doesn't happen while I'm accelerating with my foot on the gas pedal, it's usually at the very beginning. I think it is also somehow related to the stalling that I feel when I move from idle to an accelerating state. However, I never feel any jerks or stalls if I'm constantly accelerating at higher speeds. The car can easily do a 100mph without trouble.

On a final note, to explain how the vibration feels like, it's as if it's coming from the front half of the car, mainly the engine area. It is also felt around my feet as I press the gas pedal as well, but it is strong enough to let the driver and the shotgun passenger feel like the car's shaking. Keep in mind that this vibration would keep occurring as long as I hold the gas pedal in that certain position which triggered it. It would stop occurring if I press it further, or if I release and press it again. Very random.

I hope I can get some assistance on this issue. It's been a real pain dealing with it in the past few months. Thank you guys for reading until the end.

 

What you are experiencing is a misfire, not stalling. I suspect you're going to have to put a scanner that reads in real time on the diagnostic port and drive it. See what it shows when it has the misfire. One thing you can try is get up to speed. Get the misfire shudder and then slip your transmission into neutral. Repeat the throttle position and see if the misfire stays the same or goes away. I think somewhere in the controls is a bad connection or faulty component. These kinds of problems can be stinkers to track down. Then again, it feels GOOD to finally fix it.

 

This could also be a problem with the MDS it tends to vibrate at that speed. The vibration is coming from the torque converter if this is the issue, the other guy could be right maybe it is a misfire...... Who knows.