infinity stalling

this 2001 infinity G20 is stalling at idle erratically, no codes. I tapped on the mass air sensor and the distributor with no results . can you help ? It runs fine in other respects.

 

One early step in the troubleshooting should be to check fuel pressure. You might even just go ahead and change the fuel filter if it hasn't been done recently. Either way, get a gauge on the fuel system and see what kind of pressure you are getting.

 

try checking the throttle position sensor?

 

The correct spelling of the car's name is Infiniti.

 

Possibility of AIS motor acting up. AIS = automatic idle speed. Did you notice it happening more with ac or defrost on? With everything off, does it idle o.k. most or all the time? For the price of a can of throttle body cleaner, I'd try removing air intake hose at throttle body, and spray generously in area of all ports (holes) you see inside the throttle body, as well as open throttle wide open,(with engine off obviously) and spray too. Let sit for a few minutes, then start. It may stumble a bit at first, but that's normal, it will smooth out. Try a couple of times if necessary. If AIS is gummed up, this will sometimes clean the area, and cure your problem. If it doesn't, and AIS is easy to remove, do so, ( which I would do anyway if it is easy to get at.) and clean well with same spray.