Colortune or sync first?

[tweeleft]

Ok Which is first sync or colortune? Or one after the other?

[GLoweVA]

Sync then color tune. Thou the color tune isn't necessary and you can tune by ear instead.

[natemoen]

Both. Do a initial sync and then leave the sync gauges on as you do the colortune. after each cylinder redo the sync. Every time you change the idle screws you are going to change the vacuum level in that cylinder and that affects the sync.

[Rasputin]

Both. Do a initial sync and then leave the sync gauges on as you do the colortune. after each cylinder redo the sync. Every time you change the idle screws you are going to change the vacuum level in that cylinder and that affects the sync.

+1 in my opinion

[ddragon63]

Both. Do a initial sync and then leave the sync gauges on as you do the colortune. after each cylinder redo the sync. Every time you change the idle screws you are going to change the vacuum level in that cylinder and that affects the sync.

+2 sounds like a good way to kill 2 birds with 1 stone, as they say

[tweeleft]

Thx guys I'll be working on it this weekend. That makes sense.

[cywelchjr]

Both. Do a initial sync and then leave the sync gauges on as you do the colortune. after each cylinder redo the sync. Every time you change the idle screws you are going to change the vacuum level in that cylinder and that affects the sync.

I do an idle mixture adjustment (colortune) on ALL carbs first, then sync, then another mixture adjustment on all carbs and then redo the sync again. When done this way you will get the cleanest smoothest sync.

[natemoen]

You just always need to be different don't you Cy!

[cywelchjr]

You just always need to be different don't you Cy!

I say what works for me. I find it to be LESS work to do a complete mixture adjustment, then sync, the ANOTHER complete mixture adjustment then another sync, that's a bit less syncing than you're suggesting, as your suggesting requires touching the sync up to 4 additional times where mine requires only 2 and I'll bet the results are the same with less time invested. Use lazy old men tend to work out ways to get stuff done with less steps and less work, it has something to do with already having done so many things the hard way when we were young .

[79XS11F]

I sync first so that I don't have to run the color tune plugs in the engine too long. Once I have a good sync with regular plugs I drop in the color tunes and color tune it. Then the regular plugs go back in to recheck and or adjust the sync. If the sync needs any big adjustments with the regular plugs back in the engine I will color tune again.
Rob