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Old 11-09-2004, 05:19 AM   #1
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Default 104 plugs ... WRONG !

Just a quick post to tell others. Going on a past thread I installed Autolite 104 plugs ( gapped at .055 ) after my mods.
SEVERAL members stated that this may be too cold of a plug. Being the hard head that I am I forged ahead.
To make a long story short, I'm pulling them out this weekend and installing a set of 605'*.
I get cold misfires. While they have not been in long enough to foul they do have a dark grey tint to them after about 500 miles.
They work great when warm. I just can't take the cold weather start up compromise.

Just trying to prevent others from urinating away money for no reason. It pays to listen.
It cost to be a hard head.

JLathem
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Old 11-09-2004, 08:43 AM   #2
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Sometimes you have to learn the hard way to understand

I would check the 605'* regularly for the first 1000 miles or so and keep an eye on them as well.
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Old 11-09-2004, 09:02 AM   #3
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Yikes, now I'm getting scared. When I do my pulley in a couple weeks, I will be using 104'*. Should I be worried about the winter coming up?
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Old 11-09-2004, 09:13 AM   #4
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Your probably all right...

A good rule of thumb is

1 step cooler for 0-6lb boost (.055)
2 step cooler for 6-12lb (.050)
3 step cooler for 12-18lb (.045)
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