1985 Corvette: Service Bulletin: Low Idle Speed and Launch Stalls

Subject: Low Idle Speed and Launch Stalls
Model and Year: 1985 Corvette
Source: Chevrolet Dealer Sevice Bulletin
Bulletin Number: 85-186, Section 6E
Date: Mar., 1986


Some 1985 Corvettes with manual transmission may experience complaints of low idle speed and launch stalls.  If these complaints occur, it will be necessary to replace the ECM calibration PROM.

This new PROM, P/N 1227806 raises the idle speed to 750 RPM.

Use applicable labor time and operation number.

General Motors bulletins are intended for use by professional technicians, not a "do-it-yourselfer". They are written to inform those technicians of conditions that may occur on some vehicles, or to provide information that could assist in the proper service of a vehicle. Properly trained technicians have the equipment, tools, safety instructions and know-how to do a job properly and safely. If a condition is described, do not assume that the bulletin applies to your vehicle, or that your vehicle will have that condition. See a General Motors dealer servicing your brand of General Motors vehicle for information on whether your vehicle may benefit from the information.

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Article ID: 609
Created: July 29, 2014
Last Updated: January 29, 2015
Author: Rob Loszewski

Online URL: https://www.corvetteactioncenter.com/tech/knowledgebase/article.php?id=609