points/timing adjustment, how often? and wierd stuff...
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Elder User
Joined: Mar 2003
Posts: 541
Likes: 1
From: Phoenix Az, by way of Fre
points/timing adjustment, how often? and wierd stuff...
seems every 400-500 miles I have set points and timing.
seems when setting timing (vacuum pluged) it will set(6*), then after a few seconds of running, it'll drop a few degrees all by itself(3*). i turn the dizzy to get it set it to 6* again, and the timing jumps to 12-14*...
also, even when all the stars align, and I get the truck running real smooth, I have more power at part throttle than I do at full throttle... even if I'm just rolling thru the range of the gas pedal, seems once I go much past 1/2 throttle, power falls off.
https://www.ford-trucks.com/forums/s...d.php?t=226916
I read that thread, and wonder'd if my issues are comming from my old original dizzy.
fresh 390, 0.040 over, ported c1ae/c6aer heads, stock 2bbl(rebuilt and new power valve) C6 on it's very, very last legs.
seems when setting timing (vacuum pluged) it will set(6*), then after a few seconds of running, it'll drop a few degrees all by itself(3*). i turn the dizzy to get it set it to 6* again, and the timing jumps to 12-14*...
also, even when all the stars align, and I get the truck running real smooth, I have more power at part throttle than I do at full throttle... even if I'm just rolling thru the range of the gas pedal, seems once I go much past 1/2 throttle, power falls off.
https://www.ford-trucks.com/forums/s...d.php?t=226916
I read that thread, and wonder'd if my issues are comming from my old original dizzy.
fresh 390, 0.040 over, ported c1ae/c6aer heads, stock 2bbl(rebuilt and new power valve) C6 on it's very, very last legs.
FE "Freakin Expensive"
Joined: Dec 2003
Posts: 6,461
Likes: 4
From: Smith Mountain Lake, VA
Mike..
I dont know how many miles ya have on the motor? but.. a change in timing like that could very well be a worn out dist. gear.. weak springs in the advance system..
dist. weights sticking..worn out timing gears and chain..Bad vacuum advance diaphram. It sounds like maybe to distributor advance is not holding vacuum? Good Luck-Russ...
I dont know how many miles ya have on the motor? but.. a change in timing like that could very well be a worn out dist. gear.. weak springs in the advance system..
dist. weights sticking..worn out timing gears and chain..Bad vacuum advance diaphram. It sounds like maybe to distributor advance is not holding vacuum? Good Luck-Russ...
Lead Driver
Joined: Jan 2003
Posts: 9,893
Likes: 12
From: Ohio
Grab the shaft and see how much it wiggles. Then grab it and see how much slop in rotation it has. I think the advance weights are playing with you. It should rotate and return quickly to start point, and not have any loose-ness to it. If so, the advance is moving around and this is causing the eratic timing issue.
One way to help is to replace it, but I would probably just pull it apart and see what needs fixed. It may just need some tweaking with a pair of needle nose pliers. I've see many like that, even newer ones. Rebuilt ones are not always that perfect either. I would check a new one also.
One way to help is to replace it, but I would probably just pull it apart and see what needs fixed. It may just need some tweaking with a pair of needle nose pliers. I've see many like that, even newer ones. Rebuilt ones are not always that perfect either. I would check a new one also.
