setting timing

[jimhrabe]

This may be a stupid question but do I disconnect the brown wire before starting the truck to set the timing or after the truck is already running?

 

[Loeryder]

Re: setting timing

Set Your Timing
Disconnect Tan/black wire under passenger side carpeting
Connect timing light to battery and #1 plug wire
Loosen Distributor hold down bolt
Start engine
Set timing to zero by twisting distributor while shining timing light on dampener
Turn off engine
Tighten lockdown bolt
Reconnect tan/black wire and pull ECM fuses for a few minutes to reset ECM

 

[Don W.]

Re: setting timing

Set Your Timing
Disconnect Tan/black wire under passenger side carpeting
Connect itming light to battery and #1 plug wire
Loosen Distributor hold down bolt
Start engine
Set timing to zero by twisting distributor while shining timing light on dampener
Turn off engine
Tighten lockdown bolt
Reconnect tan/black wire and pull ECM fuses for a few minutes to reset ECM

Unless it's my truck and the bolt is already loose. This winter I'm gonna pull the dist and see just what the heck is going on down there. It's as if the hold down "fork" is the wrong one or something, cuz it'll slide off the dist. Weird... Wish I had xray eyes. Can't hardly touch that d*** bolt much less see it.:squint:

 

[Zewerr]

Re: setting timing

I have yet to check the timing on my truck since I bought it. But can't you just jump pins A and B of the ALDL to get base timing and set it then just like other OBD I GM's?