2005 Volkswagen Jetta
Problem for Volkswagen 2005 Jetta

My 2006 tdi idling speed is constant but sometimes




By jonfrenchie on Oct 15, 2009

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My 2006 tdi idling speed is constant at 800 rpm but sometimes is rough, as if it is missing on one cylinder. If you load the engine by turning on the AC the roughness stops. The engine runs fine when driving.Any suggestions?

Solution #1

posted on Oct 15, 2009
Not Rated)

glenw64

Rank: Guru  Cars  Expert
Rating: 85%, 21 votes
when you turn on the a/c the ecm increases engine fuel to compensate for extra load could possibly be a vacuum leak
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