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Old 05-06-2005, 04:20 PM   #1
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1 step colder spark plug numbers here

After doing some research, here are the 3 existing part numbers for 1 step colder spark plugs for the Zetec:

1. AZFS22CF4
This is the original copper core plug. Still available
2. AZFS22PPF4
This is the original double platinum "PP". Being phased out and replaced by...
3. AYFS22FMF4
Replacing the double platinum is this "fine wire" plug which I believe is an
iridium plug.

The new fine wire plug is around 2 bucks cheaper than the double platinum it is replacing. I run the coppers, but was not aware of the double plats. Now there is the "fine wire" plugs...I'll be upgrading to those since I'm due for a plug change.

I'm not sure if this should be a sticky.


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Old 05-06-2005, 04:26 PM   #2
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awesome find chalon, didn't know bout the new one... i was always for running coppers :)
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Old 05-18-2005, 01:56 PM   #3
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which ones are the best?
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Old 05-22-2005, 01:20 PM   #4
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Old 05-22-2005, 02:25 PM   #5
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iridium , platinum are both for making the plug last longer , they run hotter so they dont get build up on them and dont ware as much , In my opinion neither have a place in a performance engine

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Old 05-22-2005, 02:36 PM   #6
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Quote:
Originally posted by 1turbofocus
iridium , platinum are both for making the plug last longer , they run hotter so they dont get build up on them and dont ware as much , In my opinion neither have a place in a performance engine

Tom
Just for the sake of clarification, by running hotter and lasting longer, what drawbacks to performance are there? What makes the copper plug superior?
I ask for myself, as well as those who really don't know the difference.
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Old 05-22-2005, 02:55 PM   #7
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It seems to me the copper plugs are really for track use and not everyday plugs. I had the copper plugs and ended up melting the tip of one of them and messing up one of my exhaust valves which has caused some problems. Seems like the 1 or 2 step colder stock plugs would be a better long term choice, but everyone has their preferences.
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Old 05-22-2005, 02:58 PM   #8
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By hotter i mean the heat range of the plug , The hotter the range when added to higher Cyl load the higher chance of the plug to cause Deto

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Old 05-22-2005, 08:48 PM   #9
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deto.......grrr.......got it
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Old 05-25-2005, 01:13 AM   #10
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I been running the AZFS22CF4 on my zetec for a while now and I just have the basic mods at the moment. I went to ford to get stock plugs and they want $50 where as the copper AZFS22CF4 were only $12 for the set.

I didnt find any problems running them. Car ran kind of goofy when it was cold out but that may have just be coinsidence.

Any way this thread should be pinned. Those part #'s I find are always being asked.

I was also told that per every 50hp added to the car you should go 1 step colder. Is that accurate?
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