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Location:
Terrigal
Registered:
May 2002
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3 out of 4 plugs firing
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Sat, 12 July 2003 08:32
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Hi all, in need of some help!
I'm trying to get an old 4AC running at the moment. For some reason that beats me its only firing plugs 2, 3 & 4. No.1 is not firing.
I've changed the dizzy cap, rotor, points, hi-tension leads but still no go!
I can't work it out.. It's such a simple system and if all the other plugs are firing should be no reason for number 1 not to.
Sometimes there is a very weak spark, but most the time none at all. I've put the timing light on the hi-tension leads and it flashes for all of them apart from the no.1 lead.
Any ideas?
Thanks
Joel
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Location:
Sydney, Australia
Registered:
August 2002
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Re: 3 out of 4 plugs firing
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Sat, 12 July 2003 09:01
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Try swapping the spark plugs around. Sometimes spark plugs can have a hair line crack in the insulator which you can't see, but sparks jump the gap very easily resulting in very little spark energy.
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Location:
Terrigal
Registered:
May 2002
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Re: 3 out of 4 plugs firing
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Sun, 13 July 2003 06:50
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you're a legend mate.. thats exactly what it was!
cheers
Joel
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Location:
cambo
Registered:
May 2002
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Re: 3 out of 4 plugs firing
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Sun, 13 July 2003 11:08
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i cant believe you didnt try just swapping the plugs hehehe. but i spose you wouldnt really think that would be it hey? its always something simple, which i spose is a good thing in a way.
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Location:
Perth
Registered:
November 2002
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Re: 3 out of 4 plugs firing
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Sun, 13 July 2003 13:50
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unfortunately on mine it wasn't so simple, burnt out valve. Couple of hundred dollars later.. 
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