Thread: Engine pulses
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      12-09-2012, 06:05 AM   #11
Dr Dave
Zummerzet Zyder Drinker!
United Kingdom

Drives: '06 330D Le Mans Blue
Join Date: May 2009
Location: Somerset

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No I wouldn't have thought the glow plugs could cause a variation in idle speed once the engine has warmed slightly. They are only used these days on modern CI engines to achieve clean combustion quality at low temperatures - not as a starting aid as they used to be on older indirect engines.

Mine, at times, can be a bit lumpy of left idling from cold - I just start and drive, it is never a problem.