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08-09-2020, 07:36 AM | #1 |
Senior Member
Join Date: Aug 2017
Posts: 107
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F1-missing
My flathead just started missing,it misses in 3 rd gear with the gas pedal mashed going up hill,it doesn,t miss any other time. Where to start??
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08-09-2020, 07:59 AM | #2 |
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Join Date: Mar 2013
Location: Green Bay Wi
Posts: 400
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Re: F1-missing
How old is the ignition system under heavy excel spark plugs are usually the first thing to try but don’t forget cap wires rotor points and condenser keep us informed
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08-09-2020, 08:53 AM | #3 |
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Join Date: May 2010
Location: upstate SC
Posts: 2,969
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Re: F1-missing
remove and look at plugs-anyone of them different looking indicating a miss? clean and replace if this does not help then new plugs (autolite 216) would be the first change, then plug wires, cap, rotor. how long
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08-16-2020, 12:04 AM | #4 |
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Join Date: Aug 2020
Location: Heart of Dixie ( Alabama)
Posts: 63
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Re: F1-missing
1. Check the timing with a light. Put the pointer on the pulley dot. (stock specs)
2. Go through the tune up stuff. |
08-16-2020, 12:18 PM | #5 |
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Join Date: Nov 2012
Location: Wichita KS
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Re: F1-missing
I am not that knowledgeable on the vacuum only advance distributors, but will a vacuum leak or malfunction cause this type of issue? It would at the least cause the timing to be retarded.
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08-16-2020, 12:40 PM | #6 | |
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Join Date: Aug 2020
Location: Heart of Dixie ( Alabama)
Posts: 63
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Re: F1-missing
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Quote:
The distributor may need a overhaul if the timing and tune up stuff does not help. Then there's the fuel end but one thing at a time. |
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08-16-2020, 01:15 PM | #7 |
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Join Date: Aug 2020
Location: Heart of Dixie ( Alabama)
Posts: 63
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Re: F1-missing
This was a timing issue. This was before I timed it with a light. It was advanced way too far.
I was going through the tune up stuff as this car would barely run. I did not realize how bad it was until I started to go through it. Before I put it on the light, I tried to set it by ear with a Vacuum gauge. I put the distributor where the PO had it. What I did not realize is how tinny it sounded. As I retarded it with a light, setting it to the correct position, the RPMs dropped, the sound changed from the tinny sound in the video do a deep steady rumble with no miss. Here it is missing at idle. https://www.youtube.com/watch?v=s17qGqm57-g |
08-16-2020, 07:01 PM | #8 |
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Join Date: Aug 2017
Posts: 107
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Re: F1-missing
The timing is great on my thread,I just gave it new points and condenser,still have problem,maybe accelerator pump?
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08-18-2020, 05:11 PM | #9 |
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Join Date: Aug 2017
Posts: 107
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Re: F1-missing
Vacuum canister,if applied suction(brake bleeder pump use )the vacuum canister linkage moves but doesn't hold any pressure,this is faulty,correct!!
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08-18-2020, 05:43 PM | #10 |
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Join Date: Jun 2016
Location: BC, Canada
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Re: F1-missing
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08-26-2020, 05:22 PM | #11 |
Senior Member
Join Date: Aug 2017
Posts: 107
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Re: F1-missing
Ok,I put,new points,new condenser,new plugs,vacuum canister had hole in,replaced,swap out rebuilt carb...same,swap out different fuel pump...same ,wires look newer,cap looks newer,rotor looks newer......starts up great,idles great,drives at first good cold .....then starts to miss like running out of gas,now what?
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08-26-2020, 05:41 PM | #12 |
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Join Date: May 2010
Location: Solihull, England.
Posts: 8,760
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Re: F1-missing
Gas cap venting ok? Try it with the cap loose.
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08-26-2020, 07:27 PM | #13 |
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Join Date: Sep 2019
Location: Fort Gratiot, Michigan
Posts: 2,296
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Re: F1-missing
Do you by chance have a gasoline filter? If so maybe it needs replacing !
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08-26-2020, 08:11 PM | #14 |
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Join Date: Jan 2014
Location: Orcas Island Washington
Posts: 4,968
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Re: F1-missing
While my similar problem was with the earlier distributor, My coil was quite hot as I had switched to 12 V with a bosch super coil and the spark was grounding to the rotor shaft right through the rotor. ONLY noticed the missing after warm and climbing hills in high gear at wide open throttle.... UNTIL the vehicle just stopped on the way home from lunch. Do the later distributors get the shorted rotor thing?
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Owner/Operator of 'Jailbar Ranch' on the side of Mt. Pickett. Current stable consists of 1946 1/2 ton pickup turned woodie wagon with FH V8, 1946 Tonner Pickup with 226 H six, 1979 Toyota landcruiser wagon, now wearing 1947 Ford Jailbar sheet metal. 'Rusty ol' floorboards, hot on their feet' (Alan Jackson) |
08-27-2020, 09:30 AM | #15 |
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Join Date: May 2010
Location: Northern Illinois
Posts: 378
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Re: F1-missing
Check your distributor cap carefully. I had a miss on a '50 that dogged me for a long time. The cap looked good, but I couldn't see that the graphite "button" at the top was cracked and made intermittent contact.
Ken
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08-28-2020, 07:31 PM | #16 |
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Join Date: Aug 2017
Posts: 107
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Re: F1-missing
Changing cap and rotor and putting some new wires in distributor..
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08-28-2020, 08:32 PM | #17 |
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Location: Wichita KS
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Re: F1-missing
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08-28-2020, 08:52 PM | #18 |
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Join Date: Aug 2017
Posts: 107
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Re: F1-missing
I did replace with a good coil,no good...
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