The Ford Barn

farmerdick · 06-29-2014, 02:26 PM

Gentlemen, Between 45 and 50 going up hill the car starts to have a hitch in it and lose power. When I slow down to 45 and under it comes out of it. Car runs beautifully other than that. Has new coil, points and condenser. It seems only to happen with a load on it. I could go 55 on the flat just fine but then the RPM`s would be over 2000. I have the modern points and condenser from Nu-REX installed. Any ideas?

Farmerdick

700rpm · 06-29-2014, 02:30 PM

My suggestions:

1. Go back to original points and condenser as Henry built it.
2. Retard your spark on a hill and/or under load.
3. If you're above 4000 feet, open your GAV.

johnbuckley · 06-29-2014, 02:55 PM

Any symptoms other than losing power? eg firing only on 3 cylinders? or a misfire? back popple through carb? back fire through exhaust?

farmerdick · 06-29-2014, 03:26 PM

Yes, I forgot to mention it does start to backfire!!!

Tom Endy · 06-29-2014, 03:32 PM

If you put new points in recently new points have a tendency to close up dramatically in the first few hundred miles from where you set them. From a setting of .020 they can easily close to .010. This can cause you to lose power on a grade. Check the gap and re-set if that is the case. After a while a glaze is acquired to the rubbing block and the close-up is less dramatic. It is prudent to check the point gap each time you change the oil.

Tom Endy

fiddlybits · 06-29-2014, 03:43 PM

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It sound like point gap.
I've discovered on all the "old" cars with points to check the point gap at 50, 100, 200, 400 and 1000 miles after installing a new set.
(I used to do only 500 and 1000 but the points of late seem to have a softer rub block. The modern points are no exception.)

farmerdick · 06-29-2014, 03:58 PM

Thanks guys. I will do a recheck tomorrow(Monday). I have put her away for the day. Its close to 90 degrees out side. Can you believe that for Maine at the end of June?
Farmerdick

Aerocraft · 06-29-2014, 04:01 PM

Richen the mixture by opening up the GAV.

Gar WIlliams

tbirdtbird · 06-29-2014, 04:10 PM

what Gar said.
It never hurts to play with the GAV........

29 Tudor · 06-29-2014, 06:46 PM

I had a similar problem with my '29. Turned out to be a needle and seat that would not deliver enough fuel to support the engine at that load. You can pull the plug at the bottom of the carb and measure the flow (I used a quart jar) and determine of you have enough to support the engine. At 40 MPH, it takes 90 seconds to cover a mile. I assumed the mileage at 40 MPH climbing a hill (at full throttle) to be 5 MPG. That means you need at least .2 gallons out of the drain in 90 seconds to support that mileage. When I checked mine, it was much lower than that. After replacing the needle and seat, it was much higher and the problem was gone.

Steve

06-29-2014, 02:26 PM	#1
farmerdick Senior Member Join Date: Nov 2011 Location: Readfield, Maine Posts: 347	Loss of Power up Hill Gentlemen, Between 45 and 50 going up hill the car starts to have a hitch in it and lose power. When I slow down to 45 and under it comes out of it. Car runs beautifully other than that. Has new coil, points and condenser. It seems only to happen with a load on it. I could go 55 on the flat just fine but then the RPM`s would be over 2000. I have the modern points and condenser from Nu-REX installed. Any ideas? Farmerdick

06-29-2014, 02:30 PM	#2
700rpm Senior Member Join Date: May 2010 Location: Portland, Oregon Posts: 5,913	Re: Loss of Power up Hill My suggestions: 1. Go back to original points and condenser as Henry built it. 2. Retard your spark on a hill and/or under load. 3. If you're above 4000 feet, open your GAV. __________________ Ray Horton, Portland, OR As you go through life, keep your eye on the donut, not the hole.

06-29-2014, 02:55 PM	#3
johnbuckley Senior Member Join Date: Jul 2010 Location: United Kingdom Posts: 1,445	Re: Loss of Power up Hill Any symptoms other than losing power? eg firing only on 3 cylinders? or a misfire? back popple through carb? back fire through exhaust?

06-29-2014, 03:26 PM	#4
farmerdick Senior Member Join Date: Nov 2011 Location: Readfield, Maine Posts: 347	Re: Loss of Power up Hill Yes, I forgot to mention it does start to backfire!!!

06-29-2014, 03:32 PM	#5
Tom Endy Senior Member Join Date: May 2010 Location: Southern California Posts: 3,134	Re: Loss of Power up Hill If you put new points in recently new points have a tendency to close up dramatically in the first few hundred miles from where you set them. From a setting of .020 they can easily close to .010. This can cause you to lose power on a grade. Check the gap and re-set if that is the case. After a while a glaze is acquired to the rubbing block and the close-up is less dramatic. It is prudent to check the point gap each time you change the oil. Tom Endy

06-29-2014, 03:43 PM	#6
fiddlybits Senior Member Join Date: Jan 2014 Location: N Illinois Posts: 447	Re: Loss of Power up Hill Sponsored Links (Register now to hide all advertisements) It sound like point gap. I've discovered on all the "old" cars with points to check the point gap at 50, 100, 200, 400 and 1000 miles after installing a new set. (I used to do only 500 and 1000 but the points of late seem to have a softer rub block. The modern points are no exception.)

06-29-2014, 03:58 PM	#7
farmerdick Senior Member Join Date: Nov 2011 Location: Readfield, Maine Posts: 347	Re: Loss of Power up Hill Thanks guys. I will do a recheck tomorrow(Monday). I have put her away for the day. Its close to 90 degrees out side. Can you believe that for Maine at the end of June? Farmerdick

06-29-2014, 04:01 PM	#8
Aerocraft Senior Member Join Date: May 2010 Location: Naperville, IL Posts: 1,387	Re: Loss of Power up Hill Richen the mixture by opening up the GAV. Gar WIlliams

06-29-2014, 04:10 PM	#9
tbirdtbird BANNED Join Date: May 2012 Location: inside your RAM Posts: 3,134	Re: Loss of Power up Hill what Gar said. It never hurts to play with the GAV........ __________________ '31 180A

06-29-2014, 06:46 PM	#10
29 Tudor Senior Member Join Date: Apr 2011 Location: Magnolia, TX Posts: 161	Re: Loss of Power up Hill I had a similar problem with my '29. Turned out to be a needle and seat that would not deliver enough fuel to support the engine at that load. You can pull the plug at the bottom of the carb and measure the flow (I used a quart jar) and determine of you have enough to support the engine. At 40 MPH, it takes 90 seconds to cover a mile. I assumed the mileage at 40 MPH climbing a hill (at full throttle) to be 5 MPG. That means you need at least .2 gallons out of the drain in 90 seconds to support that mileage. When I checked mine, it was much lower than that. After replacing the needle and seat, it was much higher and the problem was gone. Steve