The Ford Barn

CPB · 08-14-2012, 06:01 PM

Hi All,
I have been trying to get my 48 running but I'm having issues with it barley idling and missing on acceleration. Dist was checked on a machine and checks out ok. I have new plugs with the correct gap, points, wires, rebuilt carb by kt and a new electric fuel pump. The gas is fresh and new fuel lines. At idle vacuum jumps radically 13" to 15" and at a high rpm vacuum gauge reads a very steady 18" I have been lurking in the background for years and really appreciate the wealth of information all of have to offer. Thank you for all your help

Charlie ny · 08-14-2012, 07:07 PM

CPB,
Will the motor continue to run with the 2 idle mixture screws turned all
the way in or nearly all the way in ?
How much up and down or back and forth slop is there when you wiggle the throttle shaft ?
Charlie ny

Tom Overfield · 08-15-2012, 08:31 AM

I was having problems with a V-12 after installing one piece guides and new valves, turned out one of the intake valves was tight. After allowing the engine to warm up fully, it unstuck itself. Then I dripped MMO down the carb and it hasnt stuck since. It sure sounds like you have a valve issue going on to me. I would get a bottle of Marvel Mystery Oil, the kind that goes in the gas tank or down the carb and dribble some down each side of the intake while running at a fast idle and see what happens.

FlatheadTed · 08-15-2012, 02:16 PM

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Try a jumper wire direct to the coil ,Then try another coil .or a rotor .possible low on the list ,Manifold leak .

08-14-2012, 06:01 PM	#1
CPB Junior Member Join Date: May 2010 Location: Michigan Posts: 7	What am i doing wrong Hi All, I have been trying to get my 48 running but I'm having issues with it barley idling and missing on acceleration. Dist was checked on a machine and checks out ok. I have new plugs with the correct gap, points, wires, rebuilt carb by kt and a new electric fuel pump. The gas is fresh and new fuel lines. At idle vacuum jumps radically 13" to 15" and at a high rpm vacuum gauge reads a very steady 18" I have been lurking in the background for years and really appreciate the wealth of information all of have to offer. Thank you for all your help

08-14-2012, 07:07 PM	#2
Charlie ny BANNED Join Date: May 2010 Posts: 3,019	Re: What am i doing wrong CPB, Will the motor continue to run with the 2 idle mixture screws turned all the way in or nearly all the way in ? How much up and down or back and forth slop is there when you wiggle the throttle shaft ? Charlie ny

08-15-2012, 08:31 AM	#3
Tom Overfield Junior Member Join Date: May 2010 Location: Kent ohio Posts: 29	Re: What am i doing wrong I was having problems with a V-12 after installing one piece guides and new valves, turned out one of the intake valves was tight. After allowing the engine to warm up fully, it unstuck itself. Then I dripped MMO down the carb and it hasnt stuck since. It sure sounds like you have a valve issue going on to me. I would get a bottle of Marvel Mystery Oil, the kind that goes in the gas tank or down the carb and dribble some down each side of the intake while running at a fast idle and see what happens.

08-15-2012, 02:16 PM	#4
FlatheadTed Senior Member Join Date: May 2010 Location: Auckland Posts: 4,709	Re: What am i doing wrong Sponsored Links (Register now to hide all advertisements) Try a jumper wire direct to the coil ,Then try another coil .or a rotor .possible low on the list ,Manifold leak . __________________ http://www.flatheadted.com Flathead Ted brake Floaters ,