The Ford Barn

trentclark · 02-06-2020, 12:23 AM

I pulled all the plugs and all a re black so i am running rich, some were black-wet. I have black residue below the exhaust pipes on my drive. I have the 94 adjusters out only 1 turn and still seems rich.

I think I have a vacuum leak somewhere which will account for the low vacuum pressure of 15 psi. Ill double check the intake and fuel pump block-off when the weather gets better. Man, I need a heated shop! God Bless you all....

JSeery · 02-06-2020, 09:42 AM

Quote:

Originally Posted by trentclark

I pulled all the plugs and all a re black so i am running rich, some were black-wet. I have black residue below the exhaust pipes on my drive. I have the 94 adjusters out only 1 turn and still seems rich.

I think I have a vacuum leak somewhere which will account for the low vacuum pressure of 15 psi. Ill double check the intake and fuel pump block-off when the weather gets better. Man, I need a heated shop! God Bless you all....

Rich and a vacuum leak are working in different directions. A vacuum leak would normally lead to lean condition, so correcting it would cause it to be even more rich. Of course you need to correct both issues. The carburetor issue could be from many internal leak sources, incorrect float level, needle valve not seating, etc.

Mart · 02-06-2020, 04:30 AM

That hole in the carb is correct. Not all have it though. It's a vent. Some have the vent but routed internally.

trentclark · 02-10-2020, 11:30 PM

Update, found a few things out. I decided to rebuild one of my 94 cores, tore two apart and one had an extra part I didnt know existed. looked at the rebuild diagram and item 42-pump discharge needle. it wasnt in my current carb, took it apart and added it. Also, wondered if all 8 cylinders were firing. put a spark light thingy between the plug and wire and showed signal to all 8. used my timing light and put the plug wire lead on each wire. #2 and #6 did not send a strobe of light. I figured the plugs were fouling somehow. They are champion rh10c. swapped them out with some new Autolites and now I have 8 cylinders firing. explains the rich exhaust and no power. has much more power now and can hit 50 mph in 3rd. still wants to backfire out the exhaust when I push it to full throttle. I played with the timing back and forth and couldnt get past the backfire over 2000 rpm. Ill rebuild the second carb this week and put it on to see if it is carb related. if not, Ive talked to bubba about rebuilding my loadamatic dizzy. getting closer which is nice. felt good going 50 mph for once.

trentclark · 02-10-2020, 11:36 PM

one more somewhat unrelated question. I have an 8BA with an 8RT dipstick. I have two dipsticks (no teenage kids intended) the other one doesnt have a stamp of which motor it goes with. I cannot find anything on the internet about which one might fit the 8BA. photo uploads are failing so Ill send photos when I figure that out. God Bless.

02-06-2020, 12:23 AM	#1
trentclark Member Join Date: Aug 2017 Location: Dallas TX Posts: 41	Re: 8BA doesnt have power I pulled all the plugs and all a re black so i am running rich, some were black-wet. I have black residue below the exhaust pipes on my drive. I have the 94 adjusters out only 1 turn and still seems rich. I think I have a vacuum leak somewhere which will account for the low vacuum pressure of 15 psi. Ill double check the intake and fuel pump block-off when the weather gets better. Man, I need a heated shop! God Bless you all....

02-06-2020, 04:30 AM	#3
Mart Senior Member Join Date: May 2010 Location: Solihull, England. Posts: 9,240	Re: 8BA doesnt have power That hole in the carb is correct. Not all have it though. It's a vent. Some have the vent but routed internally.

02-10-2020, 11:30 PM	#4
trentclark Member Join Date: Aug 2017 Location: Dallas TX Posts: 41	Re: 8BA doesnt have power Update, found a few things out. I decided to rebuild one of my 94 cores, tore two apart and one had an extra part I didnt know existed. looked at the rebuild diagram and item 42-pump discharge needle. it wasnt in my current carb, took it apart and added it. Also, wondered if all 8 cylinders were firing. put a spark light thingy between the plug and wire and showed signal to all 8. used my timing light and put the plug wire lead on each wire. #2 and #6 did not send a strobe of light. I figured the plugs were fouling somehow. They are champion rh10c. swapped them out with some new Autolites and now I have 8 cylinders firing. explains the rich exhaust and no power. has much more power now and can hit 50 mph in 3rd. still wants to backfire out the exhaust when I push it to full throttle. I played with the timing back and forth and couldnt get past the backfire over 2000 rpm. Ill rebuild the second carb this week and put it on to see if it is carb related. if not, Ive talked to bubba about rebuilding my loadamatic dizzy. getting closer which is nice. felt good going 50 mph for once.

02-10-2020, 11:36 PM	#5
trentclark Member Join Date: Aug 2017 Location: Dallas TX Posts: 41	Re: 8BA doesnt have power one more somewhat unrelated question. I have an 8BA with an 8RT dipstick. I have two dipsticks (no teenage kids intended) the other one doesnt have a stamp of which motor it goes with. I cannot find anything on the internet about which one might fit the 8BA. photo uploads are failing so Ill send photos when I figure that out. God Bless.