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Ignition Timing: What/Where to Disconnect?

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jim burke

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I did a search, but didn't quite find the answer. To set the ignition timing on an '89 350 K5, what do I need to disconnect? Is it a connector or just one wire? I think it's a tan wire with a black stripe, is this correct? Is it on the passenger side or the drivers side? Near the top of the firewall (just below the cowl)? If someone could post a picture (or e-mail it to me at [email protected] ) I'd much appreciate it!

Thanks :bow:
 
I'll see if i can find a good pic but its located on the driver side right near the firewall. One brown wire... should be about 1 foot to the right(if your standing at the front of the truck) from your master cylinder
 
Here is a good piece of advice I was given by an "old timer" :D (poke at Therobzilla). Put that wire on a toggle switch mounted to the firewall where it is easy to access. It makes timing the motor much easier to just be able to click the toggle switch back and forth to connect and disconnect that wire then trying to stick your hands down by the back of the motor.

I did it when I installed my fuel injection, and it is a GREAT cheap mod.

Harley
 
Mine is an 85 and I swapped in TPI fuel injections off a Firebird. In the aftermarket harnesses the connector is down near the distributor. It is a PITA to get to to disconnect and reconnect to time it. Now I just flip a switch and am good to go.

Harley
 
The timing bypass disconnect should be sticking out of a big wire loom on the drivers side firewall. Look for a big thick wire loom between the brake booster and the frnder. There should be a tan wire with a black stripe and a weather tite connector sticking out of the wire loom.. Pull the connector apart to set timing. be sure the engine is off before disconnecting the connector
 
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