Engine starts then stalls

I have a 09 Tacoma with a 2.7, sometime when I start it up it will run for a second then quit the only way I can restart it is to remove the positive batterie cable and reset something. This has happened 3 times in the last several months any ideas what it could be

 

I'm hearing the Crank Position Sensor would be a good place to start but I could be wrong.

 

Are you always using the same key? Try a different one. Sounds stupid but had a similar issue with a vehicle and the transmitter in the key was going bad. Any codes coming up? Check engine or security light?

 

Have you put a scan tool on it to see if there is a pending code?

 

I have not scanned for codes but will and will also switch keys and see if it happens again thanks

 

I don't think the 2.7 Liter models have an engine immobilizer at least in the USA. How about Canadia?

 

I know if you disconnect the 4.0 battery cable it will start then stall. But it will only do it once. Not sure if the 4 bangers do the same thing

 

You figure it out?

 

I suggest you get any codes you can. IF no codes I wonder of the Computer got hung/stalled?

 

I'd suggest cleaning the MAF sensor and swapping the fuel pump relay if you don't have it resolved yet.

 

correcto, all 4 cyls don't have that.

 

Immobilizers are standard equipment in Canada, in compliance with federal law.

9. [EIS] ELECTRONIC IMMOBILIZATION SYSTEM - Every passenger vehicle, multipurpose passenger vehicle, truck and three-wheeled vehicle manufactured after September 1, 2007, with a Gross Vehicle Weight Rating (GVWR) less than 4,536 kg (10,000 lbs), except an emergency vehicle or a walk-in van, must be equipped with an electronic immobilization system, as per the requirements of CMVSS 114 - Theft Protection.

 

Canadia is getting into the Nanny Business too then.

 

Try swapping out the fuel pump relay. Had something like that going on with my Tundra. If your gonna throw parts at it, throw cheap stuff first.

 

The OPs description leans me towards an electrical issue ??? Loose connector /connection? Frayed wire, Crossed wire, Etc. ????? It runs then stops suddenly then mysteriously runs fine .... battery almost dead ??? Alternator going bad /check charging (possible shorting bad diode)?

 

Oh hell, we've been there a long time.

 

For sure not an immobilser issue because the truck would not start at all. It will crank but will not start. Definitely check for codes and if possible check the data list while starting to see if there is a sensor signal missing. You need a pretty good scan tool though.