To adjust idle speed

1989 TOYOTA CRESSIDA
177,000 MILES • 6 CYL • 2WD • AUTOMATIC
Avatar
RELNIS33
  • MEMBER
  • 1 POST
Dear Sir or Madame,
I have Toyota Cressida 1989, MX 83L AEPQFA.
Engine 7M-GE MX83-00 189 28.
Edition: Fbr. 1989.
According to Chilton Repair Manual ( 1997, p. 2-16) I need to adjust the idle speed.
To do so I need to …”remove the rubber plug from the side of the throttle body exposing the idle adjustment screw”.
I have a hole alike but it plugged by cupper plug very tightly and not removable.
Jan 10, 2011 at 5:59 AM
Advertisement
Avatar
RASMATAZ
  • ✓ASE Certified Mechanic
  • 75,992 POSTS
  • ASE Certified Mechanic
Clean out the idle speed control valve and see what happens before you adjust the screw-might have to force it open due to tampering

The ECU receives input from various sensors and controls idle speed through the idle speed control valve. The ISC Valve provides an air bypass around the throttle valve with a dual coil electric motor that rotates a flap in the air passage. The ISC Valve has battery voltage applied to terminals B1, B2 and grounds back through the ECU via terminals ISC1, ISC2, ISC3 and ISC4. All high speed idle parameters are controlled by the ECU at start-up
Jan 10, 2011 at 6:13 AM
Avatar
RASMATAZ
  • ✓ASE Certified Mechanic
  • 75,992 POSTS
  • ASE Certified Mechanic
See below

Jan 10, 2011 at 6:14 AM
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 Free Question
Repair Safety Notice: This information is for general instructional purposes only. Vehicle repair can be dangerous. Verify all information, follow manufacturer service procedures, use proper tools and safety equipment, and consult a qualified repair shop when needed.