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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Rick
1966 Chevy Caprice 427-390
2012 Chevy Camaro RS Convertible
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