SmokinBBC
Well-known member
Been discussed a million times over the years.
This is really starting to bug me. After I replaced the failed bronze distributor gear, I was getting the good ole wandering timing. So I pulled the dist and checked the end play. .025 on a dui hei aluminum body. Ok, so I shim it down to about .014. That should do the trick...nope.
Maybe it's the light. So I time it off the #6 plug.....dead steady. I move the clamp to all of the other wires....all dead steady on the balancer. So I figure bad wire. I swap the #1 and #3 wire. Still twitchty when timing on 1. 3 is dead steady. (Jump back and forth as much as 4 degrees every couple or so rotations) So it's not the wire.
Pull the cap and rotor. Maybe the #1 terminal is broken? Tested for continuity, tracking, etc. Cap looks to be perfect. The rotor looks to be in good shape with the exception of some reddish dust on the bottom side.
Wiped it down and put it all back together.........same crap.
What do you think? Cap/rotor out of phase? Cap/Rotor fried? When I first got it 3k or so miles ago, timing was steady on #1.
I was doing all this at roughly 675rpm with the vacuum advance plugged. When I bump it up to 1500rpm, it smooths out for the most part.
This is really starting to bug me. After I replaced the failed bronze distributor gear, I was getting the good ole wandering timing. So I pulled the dist and checked the end play. .025 on a dui hei aluminum body. Ok, so I shim it down to about .014. That should do the trick...nope.
Maybe it's the light. So I time it off the #6 plug.....dead steady. I move the clamp to all of the other wires....all dead steady on the balancer. So I figure bad wire. I swap the #1 and #3 wire. Still twitchty when timing on 1. 3 is dead steady. (Jump back and forth as much as 4 degrees every couple or so rotations) So it's not the wire.
Pull the cap and rotor. Maybe the #1 terminal is broken? Tested for continuity, tracking, etc. Cap looks to be perfect. The rotor looks to be in good shape with the exception of some reddish dust on the bottom side.
Wiped it down and put it all back together.........same crap.
What do you think? Cap/rotor out of phase? Cap/Rotor fried? When I first got it 3k or so miles ago, timing was steady on #1.
I was doing all this at roughly 675rpm with the vacuum advance plugged. When I bump it up to 1500rpm, it smooths out for the most part.
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