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Technical Articles Extensive step by step articles, and threads of high technical reference value. |
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#1 |
Registered Member
Join Date: May 2005
Location: Face of the sun
Posts: 370
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This is a spark plug heat range chart that has worked well for me; hopefully you will find it useful as well. The chart is not is not vehicle/engine specific. To use it, simply look up your factory spark plug (sorry, Auto light plugs only) and then go hotter or colder (depending on your use). For example; a stock Jeep 4.0 engine uses plug number 985. I’m getting a lot of fouling, so I went one step hotter; plug # 3926. When you go to your favorite auto parts store, don’t bother trying to tell them what vehicle it’s for or what you are trying to do. Most of the parts counter people won’t have any idea what you’re talking about or tell you that it can’t be done. Just give them the Autolite part number or ask for an equivalent in your favorite brand. The chart works best if you print it out and then try to read it. Unless you have eagle eyes.
![]() Coyote
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’91 XJ bone stock - why change a perfect thing? ![]() There is no such thing as driver error, only parts failure. ![]() Last edited by Coyote; 12-28-2005 at 10:43 AM. Reason: fixed now. |
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#2 | |
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Join Date: Nov 2004
Location: Anchorage, AK
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#3 |
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Join Date: May 2005
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Yep, having issues with the attachment. Trying to work it now.
I had to drop the quality quite a bit to get the image to post. If you are having problems reading the chart after you print it out, PM me and I’ll email you the original file. Coyote
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’91 XJ bone stock - why change a perfect thing? ![]() There is no such thing as driver error, only parts failure. ![]() Last edited by Coyote; 12-28-2005 at 10:43 AM. Reason: Fixed now. |
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#4 | |
Superchic
Join Date: Jul 2036
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E-mail it to me and I will post it big.
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#5 |
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Join Date: May 2005
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Email sent to you.
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’91 XJ bone stock - why change a perfect thing? ![]() There is no such thing as driver error, only parts failure. ![]() |
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