Hello all! I am fairly new to this forum. I purchased a 2010 m35x in April 2018 with just under 74,000 miles. I have been commuting a couple times a week to a town about 80 miles away so I have put about 14,000 miles on the vehicle since I purchased it. The car is a blast to drive and has not given me any issues other than the throttle body was dirty and needed to be cleaned and reset shortly after I purchased the car. Within the past couple weeks, I am seeing a couple odd things that I am not sure are related but could be. I was hoping others on this forum might have experienced one of the other of these problems. 1) I first notice an occasional loss in power for a split second like someone turned the key off and back on in a fraction of a second. I would call it a hiccup or stumble. It does not do it often and it happens so fast that it doesn't really affect the way the car drives other than you can notice the quick jerk. 2) The transmission on occasion when driving around town will act as if have it in manual mode. What I mean is that it acts like it has a manual transmission and doesn't coast like most automatic transmissions. If I am coming down a hill it will slow the car down like if I was downshifting it so I didn't need to use the brakes coming down a mountain hill. This is also intermittent which is frustrating from a troubleshooting perspective. Because both of these problems are not constant I feel like they are related to a sensor or something computer or electrical but I don't know enough about these cars to begin to troubleshoot the problem. Weird problems like this may be hard to find for a non-dealer. I have a Nissan dealer is 80 miles away and the Infiniti dealer is 180 miles away so I was hoping that someone on this forum may have seen this before.
I took it to the Infiniti dealership and had all of the gearbox, power steering, brake fluid, and transmission fluids changed shortly after I purchased the car.
Has anyone had a similar experience on either of these problems?