1998 Honda Civic Idle air control system

1998 HONDA CIVIC
Avatar
RDFREE
  • MEMBER
  • 2 POSTS
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?
Dec 11, 2008 at 8:19 AM
Avatar
ZACKMAN
  • ✓Experienced 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.
Dec 11, 2008 at 2:31 PM
Avatar
RDFREE
  • MEMBER
  • 2 POSTS
Where is this Iacv ?
Dec 11, 2008 at 2:43 PM
Avatar
ZACKMAN
  • ✓Experienced Mechanic
  • 4,202 POSTS
Non-VTEC (CX, DX, LX), top left of engine, on throttle body


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

Dec 12, 2008 at 3:15 PM
🔧 Tools & Auto Repair Parts
Find automotive tools, diagnostic equipment, and replacement parts for your next repair.
Shop on Amazon →
Paid affiliate link. As an Amazon Associate, we earn from qualifying purchases.
Add a reply
Join 2CarPros for free, one of the most advanced car repair communities on the internet. From first-time drivers to seasoned mechanics, everyone is welcome to reply, share details, and get better answers. You can add a temporary image or video first; uploads are limited to 20 MB.

Ask a new question

Frequently Asked Problems for This Vehicle