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TOPIC: 1985 - 1986 928 Idle Speed Regulator System

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


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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.
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