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Old 10-20-2010, 09:12 PM   #1
Mort
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Default One misfiring

So, I went for a little drive in the A a while ago and she seemed like she lost a little power. When I got back I disconnected the spark plug connectors and placed them 1/8" or so above the contacts on the distributor cap. Three had a nice strong steady spark, one did not. #3 was not firing or only firing once every few minutes. I took the distributor cap off and cleaned all 4 contacts, not much better. Checked that the plug was tight no better. Any idea why there would be no spark (intermittent) to only one plug? Distributor cap bad, plug bad?
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Old 10-20-2010, 09:31 PM   #2
IrishHills
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Default Re: One misfiring

Bad plug? no fire if bad.
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Old 10-20-2010, 09:32 PM   #3
bogdonj
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Default Re: One misfiring

Try changing out that plug and re-fire
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Old 10-20-2010, 10:08 PM   #4
Fred
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Default Re: One misfiring

Check the dist.cam for wear..
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Old 10-20-2010, 11:02 PM   #5
ford1
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Default Re: One misfiring

bad cap, bad plug , maybe the spark plug wire is bad also, which might go back to the dist cap, good advice on dist cam, ive had one lobe worn so bad in a dist the points wouldnt open on that lobe, thurn engine over till #3 is on top of the lobe on #3 and see if the points are opening to secs
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Old 10-20-2010, 11:08 PM   #6
Tom Wesenberg
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Default Re: One misfiring

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Swap #3 plug with #1 plug and see if the miss moves to #1. If the miss is still at #3, then the distributor body is probably bad.

As mentioned check the cam first because thats the easiest and quickest.
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Old 10-21-2010, 07:52 PM   #7
Mort
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Default Re: One misfiring

Thanks everyone, it was a bad cap! Fortunatly I am in NW CT and was able to run up to A&L Auto Parts for a replacement. Running fine!
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