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SPARK PLUGS CHANGED = Engine idling goes up to 1500 RPM

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Junwei:
SPARK PLUGS CHANGED = Engine idling goes up to 1500 RPM. May I know what causes this and how to solve this problem.  Thanks.

SoL:
Does it still idle at 1500 even after the car warm up? Like, after driving 10min.

jliow:

--- Quote from: Junwei on July 02, 2009, 06:16:59 PM ---SPARK PLUGS CHANGED = Engine idling goes up to 1500 RPM. May I know what causes this and how to solve this problem.  Thanks.

--- End quote ---

spark plugs has no relation to engine idling speed

vortex:
Is it possibily due to change of thicker engine oil after the servicing, when your car is relatively new ?

Junwei:
After warmup, still idling at 1500 RPM. No servicing done. Only changed spark plugs. Do not understand what could have cause this problem.  Is it possible that spark plug bridge was not fitted back properly or inlet manifold leak causing extra air to be suck in?

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