Fuel in intake

FED 387 · 05-30-2019, 01:59 PM

Overly rich or weak-marginal ignition system ---is it every plug or just one?

GallopinGhost · 05-30-2019, 02:10 PM

Ignition should be good. Everything new, msd dist., daytona sensors box. I've checked wire resistance from inside of cap to plug, all good.

it's 6 out of 8 plugs, I'm thinking cyl. to cyl distribution of this intake is pretty bad. Once I get to fine tuning it, pretty sure it will have staggered jetting.

don't think its rich basically. fuel mixture screws are adjusted to rpm/manifold vacuum

Larry Hill · 05-31-2019, 07:38 AM

Pull carb off and keep the fuel line hooked up. Then hold it level and have someone turn on fuel pump and see where the fuel is leaking. It maybe a gasket that is allowing fuel to drain through a vacuum port into the intake.

GallopinGhost · 05-31-2019, 08:58 AM

I've tried that Larry, not a drop. fuel pressure at 6#. When the engine is running, I can look down and nothing is coming out of the boosters. But when I take the carb off, the top of the base gasket is always wet. It's a 4 hole gasket to match intake. I'm missing something..

FED 387 · 05-31-2019, 10:48 AM

What kind of accelerator pump do you have-did u check the vacuum plug too--try another carb see if it still persists

Alan Nyhus · 05-31-2019, 12:05 PM

What's your power valve situation?

FED 387 · 05-31-2019, 12:38 PM

I meant power valve not vacuum plug

05-30-2019, 01:59 PM	#1
FED 387 VIP Member Join Date: Jun 2006 Posts: 3,417 Likes: 522 Liked 331 Times in 179 Posts	Re: Fuel in intake Overly rich or weak-marginal ignition system ---is it every plug or just one?

05-30-2019, 02:10 PM	#2
GallopinGhost Member Join Date: Jun 2010 Location: VA Posts: 230 Likes: 23 Liked 21 Times in 13 Posts	Re: Fuel in intake Ignition should be good. Everything new, msd dist., daytona sensors box. I've checked wire resistance from inside of cap to plug, all good. it's 6 out of 8 plugs, I'm thinking cyl. to cyl distribution of this intake is pretty bad. Once I get to fine tuning it, pretty sure it will have staggered jetting. don't think its rich basically. fuel mixture screws are adjusted to rpm/manifold vacuum __________________ Brian Carpenter Stock 1358 Last edited by GallopinGhost; 05-30-2019 at 02:12 PM.

05-31-2019, 07:38 AM	#3
Larry Hill Live Reporter Join Date: Oct 2004 Location: Hickory, Ky Posts: 10,630 Likes: 1,923 Liked 10,683 Times in 2,223 Posts	Re: Fuel in intake Pull carb off and keep the fuel line hooked up. Then hold it level and have someone turn on fuel pump and see where the fuel is leaking. It maybe a gasket that is allowing fuel to drain through a vacuum port into the intake. __________________ IHM Used Parts https://ihmusedparts.com 888-821-1817

05-31-2019, 08:58 AM	#4
GallopinGhost Member Join Date: Jun 2010 Location: VA Posts: 230 Likes: 23 Liked 21 Times in 13 Posts	Re: Fuel in intake I've tried that Larry, not a drop. fuel pressure at 6#. When the engine is running, I can look down and nothing is coming out of the boosters. But when I take the carb off, the top of the base gasket is always wet. It's a 4 hole gasket to match intake. I'm missing something.. __________________ Brian Carpenter Stock 1358

05-31-2019, 10:48 AM	#5
FED 387 VIP Member Join Date: Jun 2006 Posts: 3,417 Likes: 522 Liked 331 Times in 179 Posts	Re: Fuel in intake What kind of accelerator pump do you have-did u check the vacuum plug too--try another carb see if it still persists

05-31-2019, 12:05 PM	#6
Alan Nyhus VIP Member Join Date: Dec 2002 Location: Lower Dakota territory Posts: 1,180 Likes: 1,074 Liked 799 Times in 236 Posts	Re: Fuel in intake What's your power valve situation? __________________ "That'll never work....."

05-31-2019, 12:38 PM	#7
FED 387 VIP Member Join Date: Jun 2006 Posts: 3,417 Likes: 522 Liked 331 Times in 179 Posts	Re: Fuel in intake I meant power valve not vacuum plug