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vectra stallin?

was told to change the air flow meter did that the problem still persistant!! was then told about the air bypass valve where is that found and could that be the problem and how do i go about fixing that?
Dan, August 2009
could be rocker gasket and oil leaking into the sparks if so dont take out sparks remove all oil syringe it out or something absorbant to remove it then change sparks and rocker cover gasket try that it worked for me

non sarcastical person, August 2009
Possibly you mean the idle air control valve.
It, and the throttle body need to be removed and either cleaned or renewed.
Cant be more precise as you havent told us year, engine size and engine code, fuel.
If you cant be bothered, nor can I.

i see daft people, August 2009
link Click here to see other fixes for Opel Vectra.