The Ford Barn

30-9 · 10-26-2019, 07:04 AM

Trying to figure out a problem. Can someone explain what points do?

I recently put in new points gapped I think properly. But car is missing at higher rpms.

JWL · 10-26-2019, 08:34 AM

First, there is no possibility of a transformer(coil) working on straight DC. In order to make the coil work the DC has to be fluctuated-interrupted. During times of point closed operation the coil can absorb but not release until the current is interrupted at which time the absorbed energy is released from the coil and the cycle starts again when the points close. The rotor and cap are coordinated with the points in such a way as to direct the released energy to the appropriate sparkplug.

JSeery · 10-26-2019, 08:35 AM

The points are a switch, they start and stop the current flow through the coil.

HD · 10-26-2019, 08:51 AM

use a dwell meter and see if the dwell changes when you give it the gas, if it does the bushing in the dist. is probably worn causing the shaft to wobble, also check the vacuum advance

30-9 · 10-26-2019, 09:27 AM

Ok not points

I took oilbath off thinking choke may not be fully closing it’s not that.

Gonna try shooting carb cleaner in carb

Phil Gillespie · 10-27-2019, 01:38 PM

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Quote:

Originally Posted by 30-9

Ok not points

I took oilbath off thinking choke may not be fully closing it’s not that.

Gonna try shooting carb cleaner in carb

Have you rechecked the timing? Incorrect timing will give these symptoms.
Also are you 6 or 12 v ? Spark plug leads and high tension leads breaking down under load may also give these symptoms.
Phil NZ

BUBBAS IGNITION · 10-27-2019, 01:40 PM

A defective condensor will do the same thing .....

10-26-2019, 07:04 AM	#1
30-9 Senior Member Join Date: Aug 2014 Location: MA Posts: 888	53 flathead Trying to figure out a problem. Can someone explain what points do? I recently put in new points gapped I think properly. But car is missing at higher rpms. __________________ Thanks - 30-9 1939, 1940

10-26-2019, 08:34 AM	#2
JWL Member Emeritus Join Date: May 2010 Location: Fitzgerald, Georgia Posts: 2,204	Re: 53 flathead First, there is no possibility of a transformer(coil) working on straight DC. In order to make the coil work the DC has to be fluctuated-interrupted. During times of point closed operation the coil can absorb but not release until the current is interrupted at which time the absorbed energy is released from the coil and the cycle starts again when the points close. The rotor and cap are coordinated with the points in such a way as to direct the released energy to the appropriate sparkplug.

10-26-2019, 08:51 AM	#4
HD Senior Member Join Date: May 2010 Posts: 970	Re: 53 flathead use a dwell meter and see if the dwell changes when you give it the gas, if it does the bushing in the dist. is probably worn causing the shaft to wobble, also check the vacuum advance

10-26-2019, 09:27 AM	#5
30-9 Senior Member Join Date: Aug 2014 Location: MA Posts: 888	Re: 53 flathead Ok not points I took oilbath off thinking choke may not be fully closing it’s not that. Gonna try shooting carb cleaner in carb __________________ Thanks - 30-9 1939, 1940

10-27-2019, 01:40 PM	#7
BUBBAS IGNITION Senior Member Join Date: May 2010 Location: SPEEDWAY INDIANA Posts: 4,148	Re: 53 flathead A defective condensor will do the same thing ..... __________________ If it Makes Spark, we do it !!!! www.bubbasignition.com [email protected]