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Old 01-05-2010, 07:53 PM
71-LS6 71-LS6 is offline
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Default 1991 Z28 5.0 TPI ignition timing

I helped my son with an engine rebuild for the aforementioned car. He dropped the engine back in and neglected to set the initial static timing on the distributor. I vaguely remember having to disconnect the distributor from the ECM in order to properly set the initial distributor timing. Does anybody remember what the proper procedure is for this car?
Thanks Steve
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Old 01-05-2010, 08:38 PM
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Default Re: 1991 Z28 5.0 TPI ignition timing

Sold my IROC a few years ago, and it's been a while since I had to time a TPI engine, but there is a brown wire near/above the heater/AC box that needs to be disconnected. Just unplug the wire, time the engine, then reconnect the plug.

Hope this helps.
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Old 01-06-2010, 06:15 AM
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Default Re: 1991 Z28 5.0 TPI ignition timing

Many thanks, hope to take a little "spin" in it before the snow hits again tomorrow!
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Old 01-06-2010, 04:32 PM
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Default Re: 1991 Z28 5.0 TPI ignition timing

Yup, they are fun cars to drive like you stole them.
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