i was going to check the timing and the hood decal says to disconnect a tan and black wire before checking. i found a wire near the battery and when i disconnected it the engine died. is this the correct wire? i need someone with and 86 IROC tpi to let me know

thanks

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86 IROC 305 TPI, KYB shocks, poly bushings, alochol/water injection, MSD, K&N, map relocated, Flexalite dual fans, 1.6 rollers, March pulleys, ported plenum, overlays, cat gone and 3 inch flowmaster into 2 2.5pipes, MSD 300+ wires and platinum plugs, 170 thermostat, gutted air box and all free mods, (in storage for 15 years)

 

I think the wire you are looking for is on the pass side of the distributor. There's a plug there.

You have to disconnect that wire to play with the timing.

 

Check this old post. It has a picture of the EST by-pass connector.
https://www.thirdgen.org/messgboard/...ML/001499.html