when I turn on the ignition the car turns on and then shuts right back off, like the rpm is too low to keep the car on. I have to step on the gas peddle to bring the rpm back up so it can stay on.

This just started happening about two days ago. could this be a battery problem?

 

battery problem..i don.t think so. put the computer to see if it throws any trouble codes.. pepboys or autozone does this for free.

 

Throttle body needs cleaning. If i'm not mistaken, you've disconnected the battery at one point. This usually triggers the start-stall issue with a dirty throttle body.

When reconnecting the battery, it's almost like the TPS forgot it's previous settings that compenstated the dirty flap opening. Now, it's acting like it's at a default state where the flap is in more of a shut position, little that it knows, the dirt is blocking that small opening for air to get through at idle. This is my best guess and what I've observed when it happened to me.

When you do clean it, clean it thoroughly making sure that flap still has the spring-back rebound. I've noticed that dirt also gets stuck around where the flap pivots, causing a resistance in the flap movement which is the reason for most of the complaints of rough idling when people here clean them. G/L

 

Yea I disconnected the battery. So wheres the throttle body and how do I clean it? is this the part where the air filter is?

 

if its the throttle body ..your better off buying a new one!,imo i think that when u clean it it wont still be like a new and might cause u problems in the future.. the throttle body is at the end of the intake next to the engine block..

 

^why do you need to buy a new one?
they actually SELL throttle body cleaner spray.
its pretty easy just be careful around the sensor/butterfly.

 

damn, am gonna look into it and make sure thats the problem.
thanks for the help

 

when it happened to me i got a new one. XD.... because i really got a good deal at nissan! so i might as well

 

I was watching the DIY video here on how to clean up the throttle body
but am concerned now since to many ppl complaining about IDLE problems and lighs coming up afterwards.

 

i'm sure people with idling problems after, didnt clean it thoroughly. I had problems with rough idling in my first attempt so i took it apart again and cleaned it some more. clean it like your gonna eat off of it. just keep spraying the cleaner to the point where it's dripping or practically gushing out while you open and close the flap/butterfly. while i did that I noticed the spring rebound of the butterfly became smoother.

if you still have problems, keep in mind and FYI...all the 3.5L engines from the maxima, altima, 350z(and i think the muranos and fx35 also) are the same throttle body. I bought a used but really cheap TB from an altima as a spare.