|
|
![]() |
#1 |
Senior Member
Join Date: Jun 2002
Posts: 923
Likes: 102
Liked 101 Times in 52 Posts
|
![]()
So changing from a 4 hole to a open plenum manifold gasket solved your issue?
|
![]() |
![]() |
![]() |
#2 |
Member
Join Date: Jun 2010
Location: VA
Posts: 230
Likes: 23
Liked 21 Times in 13 Posts
|
![]()
It made a huge difference in the idle. from what I see, the first gasket blocked the source of manifold vacuum that feeds the PV. I think the PV was opening during idle. At least that is my new theory. Spark plugs are now dry as well.
__________________
Brian Carpenter Stock 1358 |
![]() |
![]() |
Liked |
![]() |
#3 |
VIP Member
Join Date: Nov 2008
Location: Glendora,Calif.
Posts: 1,135
Likes: 172
Liked 704 Times in 218 Posts
|
![]()
Make sure you have some sort of 4 hole gasket or something else, like a 4 hole thin spacer, to keep a base plate to bowl screw from getting loose and backing out and falling into the engine through the intake! Holleys do that.Could save you an engine.
|
![]() |
![]() |
![]() |
#4 |
Member
Join Date: Jun 2010
Location: VA
Posts: 230
Likes: 23
Liked 21 Times in 13 Posts
|
![]()
Thanks Greg. Good point. My theory #2 didn't pan out. Although I've seen fuel stains where there shouldn't be any, so trying a few things. Pretty annoyed with this carb as it's fresh from one of the name gurus, but I guess it's a good training experience for me.
__________________
Brian Carpenter Stock 1358 |
![]() |
![]() |
![]() |
#5 |
Member
Join Date: Jun 2010
Location: VA
Posts: 230
Likes: 23
Liked 21 Times in 13 Posts
|
![]()
I think I've fixed this issue. I had thought the PV was opening because of the base gaskets. Well I found that fuel was collecting in the vacuum space in the body behind the PV, and was being pulled in thru the vacuum port thru the baseplate. Gaskets were leaking bad on both ends. I re-surfaced both ends of the body where the fuel bowls go. Amazing how bad a shape they were in once I started working on them. I will never build a carb without doing this. The vacuum space is dry on both ends now and spark plugs are also dry. Still a little fuel in the intake, not going to worry any more about that. I'll see how it runs. I won't mention who built this carb, but he was recommended in a thread I started here. Stevie Wonder could have diagnosed this problem. And thanks to all that helped. On to the next problem......
__________________
Brian Carpenter Stock 1358 Last edited by GallopinGhost; 06-10-2019 at 07:24 AM. |
![]() |
![]() |
![]() |
#6 |
Member
Join Date: Jun 2010
Location: VA
Posts: 230
Likes: 23
Liked 21 Times in 13 Posts
|
![]()
Thought I should add this. I talked to the carb guy today, he apologized for how things went and offered to do another carb on his nickle. Can't ask for a better conclusion than that.
__________________
Brian Carpenter Stock 1358 |
![]() |
![]() |
![]() |
#7 |
Live Reporter
Join Date: Oct 2004
Location: Hickory, Ky
Posts: 10,629
Likes: 1,922
Liked 10,682 Times in 2,222 Posts
|
![]()
Raw fuel through the vacuum port, I'm glad you found it.
|
![]() |
![]() |
Liked |
![]() |
Thread Tools | |
Display Modes | |
|
|