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Honda Civic engine knock when idling and A/C on

Tiny
JNOWICZEWSKI
  • MEMBER
  • HONDA CIVIC
2000 Honda Civic VP, 137K miles, 1.6L 4-cyl

I am having an issue with my Honda Civic. When the A/C is on and the car is idle, the engine starts to knock and it seems like the A/C is cycling on and off.

When the car starts moving, the A/C works fine. The issue is only when the car is idle.

I added some 1394 freon thinking that it was low, but that did not help.

Any thoughts of what might be causing the engine knocking?
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Thursday, October 4th, 2007 AT 4:15 PM

1 Reply

Tiny
BRUCE HUNT
  • MECHANIC
  • 3,753 POSTS
First of all you need to ask if it is the engine or a component on the engine. For instance, the compressor itself can knock and the power steering unit can knock as well. Another possibility is a motor mount. You need to do some deeper investigating.
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Friday, October 5th, 2007 AT 11:12 AM

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