Timing Will Not Stay Set
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Timing Will Not Stay Set
1986 F250 460 7.5 (ALSO WHAT IS A DOUBLE ROLLER)
We Have Put In New Pick Up In Dizzy
New Timing Chain
New Coil
New Ecm???????????????????????
We Have Put In New Pick Up In Dizzy
New Timing Chain
New Coil
New Ecm???????????????????????
Last edited by nbfnwe; Sep 8, 2007 at 09:12 PM.
Junior User
Joined: Jun 2007
Posts: 62
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From: Virginia Beach
I think allwthrrider is right. A VERY good mechanic friend of mine recently told me of an engine in his fleet that grenaded itself because it would not hold time. Turned out that the distributor was worn out. He told me he could grab the dist shaft and it was tight in some directions, but not in others. Grab it, and try to move it in all directions. If it moves, there's your problem.
Senior User
Joined: Apr 2005
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Take a look at the cam gear on the distibuter, it could be worn down or even missing one tooth. One tooth will cause the timing to be off quite a bit.
Since you have the distibuter out take a look and the gear on the cam as well, can't see all of it but can get a good idea of its condition as well.
Since you have the distibuter out take a look and the gear on the cam as well, can't see all of it but can get a good idea of its condition as well.
Senior User
Joined: Jun 2006
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From: Vacaville, Ca
You Might not even be able to move it enough by hand to tell,On my 390 my timing was jumping around from 12 deg btdc to 2 deg after but it all seemed normal. Only after changing the whole thing did it stay put
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Originally Posted by nbfnwe
1986 F250 460 7.5 (ALSO WHAT IS A DOUBLE ROLLER)
We Have Put In New Pick Up In Dizzy
New Timing Chain
New Coil
New Ecm???????????????????????
We Have Put In New Pick Up In Dizzy
New Timing Chain
New Coil
New Ecm???????????????????????
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