Why does my Almera N16 1.5 stall every time i stop?

If the problem is a slow warm idle, but OK when cold I would guess the auxilliary air control valve is sticking/stuck. If it stalls when cold this probably isnt the problem. A blast of carb cleaner may sort it, or it may screwup your maf sensor if squirted in the wrong place...

c1
September 2009

Could be, but start with basics.
Does the engine seem OK otherwise, no lack of power etc?
Check air filter.
Check all air hoses and vacuum pipes for splits or leaks, make sure connectors are tight.
Remove air trunking and check inside throttle body, make sure it and the butterfly are clean, make sure breather hoses are not choked or soft/collapsed.

vic
August 2009