'69 F-250 Issues
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Freshman User
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From: Valdosta, Georgia
'69 F-250 Issues
I've got a 1969 F250 360ci, C6 automatic trans.
So when I got the truck it ran like crap. I figured out the guy I bought it from had plug wires swapped. He had 6 and 8 backwards. Fixed that, ran great. Then I decided to check timing. I advanced it from tdc to 12 btdc. Truck ran better for a few days, then it started bucking while driving really bad. I replaced the old fuel filter. Didn't fix it. Put on a new pump. Didn't fix it. Retarded timing back to 8 bdtc, but now it is popping in the tail pipe upon deceleration, and bogging down upon accelerating from a stop. Does anyone have any idea. I've tried resetting it back to tdc and that didn't help any either. This is my daily driver, so figuring it out in a timely manner would definitely help a ton. Haha.
So when I got the truck it ran like crap. I figured out the guy I bought it from had plug wires swapped. He had 6 and 8 backwards. Fixed that, ran great. Then I decided to check timing. I advanced it from tdc to 12 btdc. Truck ran better for a few days, then it started bucking while driving really bad. I replaced the old fuel filter. Didn't fix it. Put on a new pump. Didn't fix it. Retarded timing back to 8 bdtc, but now it is popping in the tail pipe upon deceleration, and bogging down upon accelerating from a stop. Does anyone have any idea. I've tried resetting it back to tdc and that didn't help any either. This is my daily driver, so figuring it out in a timely manner would definitely help a ton. Haha.
Cargo Master
Joined: Oct 2011
Posts: 2,246
Likes: 303
From: Kenner,La.
Running bad
Be sure that the carburetor is clean. Check the back lash on the timing chain, also remove the #1 plug, turn the engine by hand to see if the timing pointer lines up with “0” on the harmonic balancer when the piston is tdc. Then let us know.
Postmaster
Joined: Mar 2011
Posts: 2,698
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From: Taxachusetts
Back fire through the tail pipe - check for exhaust leaks at the heads and exhaust log doughnut....if applicable....and recheck timing.
Draggin' axe upon accelerating: Check the breaker plate for fluid movement....check the wires there, too. Point gap good? Check the vacuum advance can's connection/movement to the breaker plate whilst applying suction to the can's nipple.
And welcome to FTE.
Draggin' axe upon accelerating: Check the breaker plate for fluid movement....check the wires there, too. Point gap good? Check the vacuum advance can's connection/movement to the breaker plate whilst applying suction to the can's nipple.
And welcome to FTE.
Ford Parts Specialist
Joined: Nov 2006
Posts: 88,826
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From: Simi Valley, CA
Breaker aka point plate. Thru 1971, there were 2 individual (upper & lower) plates.
1972: FoMoCo changed to a one piece design, there are two plates held together with plastic bushings.
The bushings crack apart, the plate wiggles around.
1972: FoMoCo changed to a one piece design, there are two plates held together with plastic bushings.
The bushings crack apart, the plate wiggles around.
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From: Valdosta, Georgia
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The plate moves, but it's stiff. All the wires look fine, except one that runs from the distributor to a can looking thing.
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Freshman User
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From: Valdosta, Georgia
It has stopped backfiring and all. Seems to have gone back to normal. I mean, the issue seems to be clogged exhaust. Now to readjust carbs and set them to were I had them. That seemed like the sweet spot.
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