Pulling code 42

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Apr 12, 2003 | 02:22 PM

RUBBYRED86

Thread Starter

5th Gear

Joined: Dec 2002

Posts: 5

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From: warren mi

Pulling code 42

Im pulling a code 42 on my 86 coup. The idle is running high. Itried disconnecting the EST and there was no drop in idle like there used to be? Any Ideas?

Apr 12, 2003 | 03:18 PM

don hall

Safety Car

Joined: Aug 2002

Posts: 3,842

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From: SANTA CRUZ CA

Re: Pulling code 42 (RUBBYRED86)

Access this link, then scroll to possible faults: http://www.c4vettes.com/ecm.htm

Apr 12, 2003 | 10:37 PM

CorvetteZ51Racer

Drifting

Joined: Dec 2002

Posts: 1,861

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From: Houston TX

Re: Pulling code 42 (RUBBYRED86)

Quote:

Im pulling a code 42 on my 86 coup. The idle is running high. Itried disconnecting the EST and there was no drop in idle like there used to be? Any Ideas?

The code 42 is a malfunctioning ESC module. If you have a GM service manual for your 86, you can read through the diagnostics associated with the code 42, because there are a couple of possible causes. However, the most common cause is a burned up ESC module. They're pretty cheap to replace. Can't remember what mine cost, but it was under $20. Take the distributor cap off, remove the rotor, and the module is right there. There are instructions in the box for the new module to tell you how to replace it.

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