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Timing Procedure Question

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Old 04-06-2012, 11:43 PM
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Car: 1985 IROC
Engine: 305 TPI
Transmission: T-5
Axle/Gears: Wish it had 3.73's...
Timing Procedure Question

I've read the "typical" timing procedure, which is 6 degrees advance for a TPI engine. The question I have, is unplugging the ESC module on the firewall the same thing as disconnecting the tan/blk wire from the four wire plug? According to my 1985 GM shop manual, there is a "set timing" connector somewhere on the tan/blk wire, but I can't see it. Seems like my only option is to cut it, as I'm not too confident the four wire plug will stay in one piece if I try to take it apart.

I think my driveability issues are related to my base timing, which is where I'm starting. Any observations would be a huge help.

The car is a 1985 IROC with TPI, recently converted from an automatic to a manual transmission.

Thanks.
Old 04-07-2012, 11:33 AM
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Re: Timing Procedure Question

Look here:

Old 04-07-2012, 12:13 PM
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Car: 1985 IROC
Engine: 305 TPI
Transmission: T-5
Axle/Gears: Wish it had 3.73's...
Re: Timing Procedure Question

Thank you! I expected it to be placed between the four wire connector and the wiring harness. Obviously wrong!
Old 04-07-2012, 09:31 PM
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Re: Timing Procedure Question

after u set timing and tighten hold down bolt,hook back up EST wire then disconnect neg. battery cable to clear the EST code it is going to set.
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