Hey guys I've been having some issues with my 2007 TL type S.

Last September I started having some
Issues with my battery after two new ones I decided to change the alternator.

Every thing was well for a month or two. I then started having this issue where I would go start my car but the engine wouldn't turn over on the first try second try it would start fine. I would have to enter my navi Code. It would have the issue randomly every 2-3 weeks.

Yesterday I was driving home and stopped at a red light I felt a slight jerk but the AC was on so I didn't think anything of it. Light turns green and I start to go and the car is extremely sluggish. At 2000 rpm it was barely going. Turned into a gas station and it fixed it self. Leaving the gas station it was fine. Hit another redlight and I felt the jerk again and same problem. I even put it in Manuel mode to see if it was going in a higher gear but it was in first. Pulling into a shopping center it corrected it self again but I noticed the navi screen had reset it self and turned back on.

I'm at a loss as to what the hell is wrong with the car.

 

I would start with checking all of the connections to/from the battery. Sounds like you have a loose connection that comes and goes.

 

I seem to be having a similar issue with my 2004 TL. Just yesterday I stopped at a red light, once it was time to go I noticed my car wasn't moving I was pressing the gas and the car wouldn't go past 15 mph when I looked at my cluster the VSA and check engine light was one. I barely made it to the mechanics when I tried going home same thing wouldn't go past 20 mph I had to pull over I shut it off when I started it again the VSA light was off but still had the check engine but was now making past 20 mph

 

This is where I would start as well.

check EVERY connection

 

Car is in LIMP mode so you don't damage it. It's probably a failed accelerator positon sensor or something of the sort. Get the code read at autozone for free and it'll provide a ton of insight.