How to find normal idle speed for Civic 8th gen?

Ray-O_Vac
Mon, 20 Nov 2023 02:34:14 +0000
Maintenance/Repairs

My 2011 Civic LX (8th gen) has a 660-670rpm idle in Park, with no loads, warmed till radiator fan comes on. Have been searching the net for an hour and can’t find any definitive reference for normal warmed-up idle speed for this R18A engine. Can anyone direct me to good source? BTW, just did Honda throttle-position-relearn procedure, and it didn’t change the idle. I suspect that idle may be a bit low, but am in process of ruling out possibilities to explain a tad excessive vibration, like loose engine mounts. Would like to just confirm if this is normal idle speed.

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