2014 Kia Optima Ex
Hi all. So in addition to my P0455 code (which dealership is looking at again tomorrow) I have also developed a shuddering sound and vibration. It only happens sometimes. The sound is hard to explain but if I had to describe it it would be dit-dit-dit-dit-dit.. It does this when i am in reverse rolling out of a space(no foot on pedal)and also in drive at a stop w foot on brake. It also sometimes happens right at the end of braking coming to a stop. Slight vibration accompanies when stopped as well. This goes away in neutral and park. When I had the dealership check it out a couple weeks ago the tech said it was a noisy fuel pump and it is normal??? 😖 The car drives fine, plenty of power and smooth shifting in between gears.. I first thought motor mount but I looked at my engine when someone else shifted it into reverse and drive and it did not move excessively.. Second thought is the torque converter perhaps. I am stumped. I will try to get a video up tomorrow. Any thoughts? Thanks.