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Author
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Topic: burnt spark plugs
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mikel3891
Gearhead Posts: 111
From: philippines
Registered: Sep 2005
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posted 06-15-2006 03:54 AM
 
What could be the possible problems if my spark plugs keep on burning almost every 5-10 miles. It happened to me three times already. I have a pertronix ignitor II installed.
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exlocal
Gearhead Posts: 1552
From: hacienda hts., CA, USA
Registered: Dec 2004
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posted 06-15-2006 08:50 AM
Burnt? Like black, brown, white, broken...?Maybe the wrong heat range? ------------------
reliving youth
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mikel3891
Gearhead Posts: 111
From: philippines
Registered: Sep 2005
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posted 06-15-2006 11:00 AM
Two spark plug are burned black and broken. How do you fix the heat range?
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senzstang
Gearhead Posts: 530
From: perry, oh, usa
Registered: May 2002
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posted 06-15-2006 11:17 AM
How are the plug broken? A physically broken plug in 10 miles seems like mechanical interference to me  What motor do you have, what plugs are you using? I would stop putting new plugs in and driving NOW until you figure out what is going on. If the plugs are broken, you have to wonder where the little bits are going!!! Give us some more info. It will help diagnose your problem. [This message has been edited by senzstang (edited 06-15-2006).]
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66drop
Gearhead Posts: 192
From: Roseville Ca
Registered: Jul 2004
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posted 06-15-2006 12:00 PM
Did your plugs begin to burn before or after the pertronix II  ------------------
'66 Vert, 289, Edelbrock 1403, 3speed, w/procars.
A removable 14in grant steering wheel.
Granada disk break swap.
15x7&15x8 steel styles w/225-60-15's.
Front & rear sways.
5-leaf rear leaf sprrings and magnaflows.
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Fastback68
Gearhead Posts: 4511
From: Sucat, Paranaque, Philippines
Registered: Jul 99
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posted 06-15-2006 12:01 PM
Mike - just a thought. What brand plugs are you using? Where did you buy them? My long-time supplier in Binondo is now selling Chinese plugs for Ford that are half the price of Autolite, Bosch, NGK etc. I haven't tried them and don't intend to.
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mikel3891
Gearhead Posts: 111
From: philippines
Registered: Sep 2005
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posted 06-15-2006 09:32 PM
quote:
Originally posted by senzstang:
How are the plug broken? A physically broken plug in 10 miles seems like mechanical interference to me What motor do you have, what plugs are you using? I would stop putting new plugs in and driving NOW until you figure out what is going on. If the plugs are broken, you have to wonder where the little bits are going!!! Give us some more info. It will help diagnose your problem. [This message has been edited by senzstang (edited 06-15-2006).]
They are just burned and not useable. It might be old stock plugs.
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mikel3891
Gearhead Posts: 111
From: philippines
Registered: Sep 2005
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posted 06-15-2006 09:36 PM
quote:
Originally posted by 66drop:
Did your plugs begin to burn before or after the pertronix II
Before I rebuilt my engine. It happened to me once and thought I just needed to rebuild it. But after everything is done, it happened to me once again about 2 months ago but I don't use the car often and after I changed spark plugs, it happened to me again recently.
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mikel3891
Gearhead Posts: 111
From: philippines
Registered: Sep 2005
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posted 06-15-2006 09:39 PM
quote:
Originally posted by Fastback68:
Mike - just a thought. What brand plugs are you using? Where did you buy them? My long-time supplier in Binondo is now selling Chinese plugs for Ford that are half the price of Autolite, Bosch, NGK etc. I haven't tried them and don't intend to.
I tried the champions(which I think is old stock) first and then riverside(I also think is old stock) and now I'm using autolites(which looks like is brand new). It might have something to do with the age of the plugs, I'm not sure though.
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68 Coop
Gearhead Posts: 5847
From: Mesquite, NV. 89027
Registered: Oct 2004
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posted 06-15-2006 09:47 PM
If you can get them, pick up the Autolite 45's, and gap them at .034, even with the Pertronix.------------------
William
The easiest way to find something lost, is to buy a replacement. 68 Coupe
289
C4
3:55's/Trac-Lok
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exlocal
Gearhead Posts: 1552
From: hacienda hts., CA, USA
Registered: Dec 2004
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posted 06-15-2006 10:29 PM
I use Bosch Platinums gapped at .045. One of my cylinders is fouling a plug, but even that doesn't need attention for about 3-4 years! Something must be drastically wrong if it only lasts a few minutes.------------------
reliving youth
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