Ignition timing whacky!!! HELP!
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Elder User
Joined: Nov 2010
Posts: 676
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From: Glendale, AZ
Ignition timing whacky!!! HELP!
I have a stock 352 with rebuilt factory dizzy. I run a Pertronix 1. When reading the timing marks on balancer; they start jumping all over the place when revved up past 30* advance. This is with vacuum advance disconnected. I tried two different timing lights. I then borrowed an older dial-in Craftsman and timing marks were steady. WTH is going on here?
Junior User
Joined: Aug 2011
Posts: 73
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Sounds like the problem is with the timing lights pickup or the plug wire breaking down at high RPM. I don't think it's a problem with the truck. You could try swaping the number one plug wire with one of the others and see if it still does it with the original timing light. Hope this helps. Does it run ok?
Ford Parts Specialist
Joined: Nov 2006
Posts: 88,826
Likes: 783
From: Simi Valley, CA
Look at the balancer...see if the outer pulley has "walked away" from the inner damper. If so...that could be the problem.
At the factory, a rubber gasket is placed between the pulley and damper, then the three parts are pressed together forming a one piece assembly.
Over time, the rubber gasket age cracks and/or shrinks, causing the "walk away" process.
If not caught in time, the pulley will separate from the damper, taking assorted belts and etc. along with it...could end up in the radiator core. Not pleasant!
At the factory, a rubber gasket is placed between the pulley and damper, then the three parts are pressed together forming a one piece assembly.
Over time, the rubber gasket age cracks and/or shrinks, causing the "walk away" process.
If not caught in time, the pulley will separate from the damper, taking assorted belts and etc. along with it...could end up in the radiator core. Not pleasant!
FTE Legend
Joined: Jun 2004
Posts: 31,796
Likes: 2,354
From: Upstate NY
Look at the balancer...see if the outer pulley has "walked away" from the inner damper. If so...that could be the problem.
At the factory, a rubber gasket is placed between the pulley and damper, then the three parts are pressed together forming a one piece assembly.
Over time, the rubber gasket age cracks and/or shrinks, causing the "walk away" process.
If not caught in time, the pulley will separate from the damper, taking assorted belts and etc. along with it...could end up in the radiator core. Not pleasant!
At the factory, a rubber gasket is placed between the pulley and damper, then the three parts are pressed together forming a one piece assembly.
Over time, the rubber gasket age cracks and/or shrinks, causing the "walk away" process.
If not caught in time, the pulley will separate from the damper, taking assorted belts and etc. along with it...could end up in the radiator core. Not pleasant!
Thread Starter
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Elder User
Joined: Nov 2010
Posts: 676
Likes: 0
From: Glendale, AZ
Sounds like the problem is with the timing lights pickup or the plug wire breaking down at high RPM. I don't think it's a problem with the truck. You could try swaping the number one plug wire with one of the others and see if it still does it with the original timing light. Hope this helps. Does it run ok?
Thread Starter
|
Elder User
Joined: Nov 2010
Posts: 676
Likes: 0
From: Glendale, AZ
Look at the balancer...see if the outer pulley has "walked away" from the inner damper. If so...that could be the problem.
At the factory, a rubber gasket is placed between the pulley and damper, then the three parts are pressed together forming a one piece assembly.
Over time, the rubber gasket age cracks and/or shrinks, causing the "walk away" process.
If not caught in time, the pulley will separate from the damper, taking assorted belts and etc. along with it...could end up in the radiator core. Not pleasant!
At the factory, a rubber gasket is placed between the pulley and damper, then the three parts are pressed together forming a one piece assembly.
Over time, the rubber gasket age cracks and/or shrinks, causing the "walk away" process.
If not caught in time, the pulley will separate from the damper, taking assorted belts and etc. along with it...could end up in the radiator core. Not pleasant!
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