2007 Honda Civic Engine raising

GOLUCKY200

MEMBER
2007 HONDA CIVIC
4 CYL
2WD
AUTOMATIC
165,000 MILES

I have a Honda Civic model 2007 automatic transmission. When I start the engine, the engine raises in neutral, parking and reverse. No problem in driving. This happens only when the car is parked for a while and when I ignite the engine. The engine gives me a raising sound in parking, netral and when I am reversing. I have just done the major service by changing all the consumables. Airplug, all oils have been changed. Can you please let me know the reason for my engine giving me this jarring sound when I am starting. Thank you.

Sunday, May 16th, 2010 AT 12:49 PM

1 Reply

KHLOW2008

MECHANIC
41,814 POSTS

Hi golucky200,

When the engine temperature is low, the engine rpm would be raised when the Idle Air control valve allows more air into the intake manifold. This is known as the cold start feature and the rpm should go down after a while.

The rpm would depend on the coolant tmperature and if the idling speed remains high for prolonged periods, the IAC could be sticking.

Check if there is sufficient coolant in the radiator.

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Monday, May 17th, 2010 AT 3:41 PM