TIMING
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Junior User
Joined: Oct 1999
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TIMING
When I set the timing according to the specs. on my 1970 F250 the truck will hardly run but when I advance it about 30 degrees it runs good. I have my timing pulley in my hand now. How can I tell where the notch shoud be in reference to the slot key in the center of the shaft.
Senior User
Joined: Jun 1999
Posts: 288
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TIMING
Forget the specs, forget the marks, put everything back together and keeping in mind you do need to be sure you've got your distributer in the right tooth, and the suggestion here is premimum gasoline, then advance your timing until the engine begins to buck or stumble, back it off just a hair, lock it down, and test drive, if engine pings under accelleration, back it off just a hair until it doesn't and your set, all Ford engines will run better, deliver more power and give better fuel economy with the timing advanced beyond factory specs, Good Luck
Freshman User
Joined: Feb 2000
Posts: 36
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TIMING
The outer ring of your vibration damper has most likely slipped over the years. The best way to set timing is to use a vacume guage conected to manifold vacume and set the timing to highest and best vacume. shut the engine off and restart. if it acts like there is to much advance, back it off till it cranks ok. if it dosn't ping while driving it's good to go. P.S. Keep the vacume advance line conected when you do this.
Senior User
Joined: Jan 2000
Posts: 161
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TIMING
I had sort of the same problem on a 351w in my '66 Bronco. Apparently it is pretty common for the outer dampener ring to slip, this is how I fixed it. You'll have to pull the valve cover and check the no. 1 piston for TDC, basically just pull the sparkplug and rotate the engine (you'll need a friend) and feel when it's at it's absolute top. NOTE: Both valves must be closed, the piston is also at TDC on the exhaust stroke but the timing mark is for the compression stroke. At this point the engine is at TDC, if the TDC timing marks on the dampener aren't in line with the pointer it's off. I just bought timing tape from Summit and put it on the dampener where the pointer was when I found TDC. When I fired it up, the marks made sense, it used to show 50degrees advance at idle, now it's at 10 degrees.
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abyars111
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