I have a 08 g37, ive been experiencing some problems with the car. It stalled on reverse at low speeds I have to give more gas than usual or the car hesitates. Also when im at a complete stop the car try's to turn off and all i see in the gauges is the battery light i also have to give it more gas in order for that not to happen. Another thing is when im driving at 35-40 mph the car jumps i keep it at a steady speed but it keeps happening.
I was reading online that it could be a failing crankshaft sensor, just dont know were they are located. Has anybody had this problem before.

 

Have you ever cleaned the throttle bodies? Try that first. Some of the symptoms you describe are similar to dirty, gunked up t-bodies. There's a DIY somewhere on here. Hope this helps.

 

Rather than guessing about what is wrong, why not use a code reader? A failing CAS usually manifests itself as a loss of power until the engine simply quits.

 

TB are fairly clean, I Don't get any check engine light and I did run it on a obd2. But no codes popped up

 

The only other item I could think of that might cause that is the idle control valve, which I believe is built in to the throttle body. This is just a guess, with the info you provided. You scanned it and did not retrieve any codes??

 

No codes ? If not your for sure guessing, Could be a vacuum leak also

 

MAF sensor?

 

I thought the G37 Sedan did not come out until the 2009 MY.

 

Yea no codes, and no check engine light.. It wont do it until the car is running for about 20 min or so. I was reading on another post that it could be the "ITB" i just dont know what that short for. Thank for all the responses!
http://x.infinitihelp.com/forum/show...64.html?t=9064

 

ITB= Infiniti Technical Bulletin

 

Seems like there is a software update needed when the conditions you describe exists. Dealer.