New longer threaded spark plug

stangGT97 · Sep 25, 2006

2003 Geee T said:
I checked my plugs and at 50k miles they are as tight as a (fill in the blank) and didnt appear to budge at all.

How often should you change the wires?

99+ modulars utilize coil on plug, no spark plug wires to replace. The coils get replaced pretty much whenever they fail resistance tests... and a failing coil can by spotted by swapping the suspect from the misfiring cylinder with one from a properly firing cyl, and seeing if the misfire travels with it.

jstreet0204 · Sep 25, 2006

2003 Geee T said:
I checked my plugs and at 50k miles they are as tight as a (fill in the blank) and didnt appear to budge at all.

How often should you change the wires?

You don't have wires but you do have the coil boots that go bad. Check them when you change the plugs. They can go bad just like wires. If they are dry or cracked replace them. I had a miss in mine that I couldn't find. Changed the coil boots and fixed the problem.

2013 Geee T · Sep 28, 2006

stangGT97 said:
99+ modulars utilize coil on plug, no spark plug wires to replace. The coils get replaced pretty much whenever they fail resistance tests... and a failing coil can by spotted by swapping the suspect from the misfiring cylinder with one from a properly firing cyl, and seeing if the misfire travels with it.

I was referring to the boots (mini wires ) on each coil pack

New longer threaded spark plug

stangGT97

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jstreet0204

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2013 Geee T

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New longer threaded spark plug

stangGT97

New Member

jstreet0204

Active Member

2013 Geee T

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