1992 Honda Prelude RPMs jumps from 1000 to 1500

Tiny
H23A1 PRELUDE
  • MEMBER
  • 1992 HONDA PRELUDE
  • 4 CYL
  • FWD
  • MANUAL
  • 199,999 MILES
I have change out the EIACV and the ECTS when the code came up but stills jump up and down.
Friday, June 4th, 2010 AT 7:15 AM

1 Reply

Tiny
KHLOW2008
  • MECHANIC
  • 41,815 POSTS
When rpm surges, it is due to the idling speed too high.

1. Check for vacumn leakages. PCV, brake booster, other vacumn hoses.
2. Check the Fast Idle Thermo Valve. Ensure the coolant hoses are not clogged.
3. Check the idle speed adjustment screw.
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Sunday, June 6th, 2010 AT 5:22 AM

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