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1998 Honda Civic Idle air control system

Tiny
RDFREE
  • MEMBER
  • 1998 HONDA CIVIC
Engine Mechanical problem
1998 Honda Civic 4 cyl Front Wheel Drive Automatic 71OOO miles

My 1998 Civic failed emmisions testing with the diagnostic Idle air control system. I just bought the car for my daughters first car and seems to drive well but the idle does rev up and down when car is put in park after driving a little. Any Ideas?
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Thursday, December 11th, 2008 AT 4:19 PM

3 Replies

Tiny
ZACKMAN
  • MECHANIC
  • 4,202 POSTS
Try cleaning your idle air control valve, just make sure that the pintle doesn't go out too far, it may not go back in. If that doesn't help, you have to replace the IACV.
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Thursday, December 11th, 2008 AT 10:31 PM
Tiny
RDFREE
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Where is this Iacv?
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Thursday, December 11th, 2008 AT 10:43 PM
Tiny
ZACKMAN
  • MECHANIC
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Non-VTEC (CX, DX, LX), top left of engine, on throttle body


https://www.2carpros.com/forum/automotive_pictures/55316_civicengine_1.jpg



VTEC (HX, EX, Si)
Automatic transmission: on the throttle body
Manual transmission: on left side of intake manifold


https://www.2carpros.com/forum/automotive_pictures/55316_civicexengine_1.jpg

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Friday, December 12th, 2008 AT 11:15 PM

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