Our purpose is to support owners in their use and maintenance of the Porsche 928 and to foster camaraderie among owners throughout the world.
Welcome, Guest
Username: Password: Remember me

TOPIC: 1985 - 1986 928 Idle Speed Regulator System

1985 - 1986 928 Idle Speed Regulator System 19 Mar 2019 02:11 #20760

  • Posts:314 Thank you received: 19
  • Rich928's Avatar
  • Rich928
  • Moderator
  • Karma: 4
This attached PDF document outlines the idle speed regulator driver circuit evaluation.

A customer of mine was experiencing a high idle speed condition and requested his LH fuel injection module to be tested. This article outlines the testing.

The high idle speed problem was found to be caused by vacuum leaks and an aftermarket ISR Valve that didn't function properly.
Membership Chairman
Charter Member
1993 928 GTS Cover Girl
1987 928 S4
1979 928 5-speed rescue
1979 928 5-liter track beast
The administrator has disabled public write access.
Moderators: Rich928, mm928, billvvOC
Time to create page: 0.183 seconds