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I read the following on here some where and am convinced I need to clean the breather assembly. How do I do this? I could not find it in the vectra How 2 section. Please help.

Idle control valve & breather assembly. These cars often develop idling problems that also develop into hesitation and lack of power.
The cause is breather assembly. Over a period of time the pipes become clogged with oil and dirt. This affects the engines performance and will cause the rocker cover gaskets to start leaking oil as the crankcase fumes, unable to escape elsewhere, will force their way through the gasket.
Usual symptoms are uneven idling, revs are slow to come back down to tickover and hesitation when pulling off.
Easy fix, detailed in the Vectra (same engine basically) how2 section.:cry:
 
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