Engine Help on dead cylinder

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luisjluis1

Member
Dec 4, 2020
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Columbia, Mo
any luck with Part one of Diagnois?
Yesterday I got home and just moved the secondaries and primaries on the carb around. Fired right up on all 8. Thing runs like a new car now. I don’t know exactly what I did but I know the carb was the problem. Thanks everyone !
 

29FORD

New Member
Nov 4, 2020
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newfoundland,Canada
Yesterday I got home and just moved the secondaries and primaries on the carb around. Fired right up on all 8. Thing runs like a new car now. I don’t know exactly what I did but I know the carb was the problem. Thanks everyone !
Luke, I am also converting a EFI to carb, 1929 Model A pickup, my reasoning is that there is no where to hide wiring and ECM in a Model A , So I am using a 86 5.0 , and T5 gearbox. Now I have a question for you, valve lash adjustment, what procedure did you follow ?
 

luisjluis1

Member
Dec 4, 2020
33
4
18
19
Columbia, Mo
Luke, I am also converting a EFI to carb, 1929 Model A pickup, my reasoning is that there is no where to hide wiring and ECM in a Model A , So I am using a 86 5.0 , and T5 gearbox. Now I have a question for you, valve lash adjustment, what procedure did you follow ?
What have you done to the valves yet? Are the rockers tight yet?
 

29FORD

New Member
Nov 4, 2020
11
1
1
63
newfoundland,Canada
What have you done to the valves yet? Are the rockers tight yet?
Haven't done nothing with heads , engine is disassembled . just replacing gaskets and valve stem oil seals. all internals are in good shape for my application, just a driver nothing only dependability. I am 62 and dont need to many more moving violations ..LOL
 

luisjluis1

Member
Dec 4, 2020
33
4
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19
Columbia, Mo
Haven't done nothing with heads , engine is disassembled . just replacing gaskets and valve stem oil seals. all internals are in good shape for my application, just a driver nothing only dependability. I am 62 and dont need to many more moving violations ..LOL
What I did to set lash is tighten the rockers so that you can spin the push rods a little but done wiggle side to side. That’s zero lash. Then I torqued them down to 20ft lb. I kept track of how far it took me to get to 20 ft lb. if it took over a full turn (360’) then you’ll need shims. If it took anything less than that to get to 20ft lbs then you’re good. All of mine took from about a half a turn to three quarters of a turn which is in spec. That’s my process for doing it.
 
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General karthief

wonder how much it would cost to ship you a pair
Mod Dude
Aug 25, 2016
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Yesterday I got home and just moved the secondaries and primaries on the carb around. Fired right up on all 8. Thing runs like a new car now. I don’t know exactly what I did but I know the carb was the problem. Thanks everyone !
What exactly do you mean by 'just moved the secondaries and primaries ' around?
 

90sickfox

Wasn't a pretty sight...and I've got big hands
SN Certified Technician
Mar 2, 2015
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Glad its running for you. Maybe the float was stuck. First thing to do when diagnosing a carbureted car....tap the side of the carb with a wrench. Don't know how I forgot that. :leaving:

Firing order is based on the camshaft. There are two different firing orders for a 5.0...one is HO....the other is non HO.
 

luisjluis1

Member
Dec 4, 2020
33
4
18
19
Columbia, Mo
Hey I’m having trouble getting my carb tuned in. It backfires out the top of the carb when I give it a quick throttle. What could be causing that?