1998 Honda Prelude idle goes up and down

Tiny
MATTYP
  • MEMBER
  • 1998 HONDA PRELUDE
  • 4 CYL
  • FWD
  • MANUAL
  • 50,000 MILES
Idle goes up and down when warm or cold. Have a jbm h22a motor
Monday, April 26th, 2010 AT 4:56 PM

1 Reply

Tiny
KHLOW2008
  • MECHANIC
  • 41,814 POSTS
Hi mattyp,

If the idling speed is too high, it would cause that.

Possible causes are:
1. Idling speed adjusted too high.
2. Leaking vacumn, PCV, vacumn hoses etc.
3. Faulty or stuck IAC.
4. Lack of coolant in system.
5. Clogged coolant hoses to IAC
SPONSORED LINKS
Was this
answer
helpful?
Yes
No
+2
Saturday, May 1st, 2010 AT 6:39 AM

Please login or register to post a reply.

Related Engine Idle Erratic Content

Vacuum Leak Test and Repair
VIDEO
Vacuum Leak Test and Repair
Instructional repair video
Idling High
GUIDE
Idling High
Intermittent sensor failure or shorting can cause the computer to act strange with unusual side effects, these problems are particularly tough to diagnose. The computer...
VIEW MORE

Sponsored links