This is an intermittent problem about which I posted a message on
September 3rd.

The car starts easily at any temperature, even on a very cold Qu?bec
winter.  It runs smoothly, well almost always...

Very seldom, it hiccups for a second or two while I drive at regular
speed: the inertia restarts the engine.

More frequently, but not very frequently, it stalls while the engine
is idling.  Then I have to use the starter for 10 to 30 seconds before
the engine restarts.  When it does, I smell a very strong unburned
fuel odour in the car.  Although I have no absolute proof, I suspect
the fuel comes from the exhaust pipe, since I have not seen any fuel
leak.

In September, I thought that the Engine Control Module cut both the
ignition and the fuel... I was wrong: it cuts the ignition only.
 
I just reread the Engine Control Module OBD II codes; I got two.

One, P0115 is related to the Engine Coolant Temperature Sensor
Circuit.  I am prone
to discount it because the problem occurs at any engine or ambient
temperature.

The other, OBD II P0136, is related to the O2 Circuit (Bank 1, Sensor
2).
The Freeze Frame Data is:
    Fuel System 1  Closed Loop
    Fuel System 2  Closed Loop

This latter code is different from the one I got in September, P1355
related to the Crankshaft Position Sensor Reference.

I am afraid it will be difficult to find because the problem occurs so
infrequently.


I thank you very much in advance for any help.