Georgia Fiero Club Forum
All Things Fiero => General Fiero Discussion => Topic started by: TopNotch on June 01, 2019, 03:58:38 pm
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How often to you think about your spark plugs? Recently, I've noticed a slight miss when accelerating hard in my yellow car. So this morning I pulled a plug. Sure enough, it was worn quite a bit. I just happened to have a set on hand, so I replaced them. (Once in a while I think ahead.) No more miss.
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I tend to check them, clean them, and gap them every third oil change so roughly 15,000 miles between.
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Here are my plug tools:

A swivel head ratchet, a wobble head extension, and a home-made plug socket (16mm deep socket with an o-ring super-glued inside at the appropriate location). I like my home-made socket better than any purpose-built plug socket I've had.
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I had a set of original plugs that I ran to 150K miles. Since if was major work to get to 2 of the plugs (not a Fiero), I did replace the plugs while the engine was out. The plugs looked fine. The car ran fine, but the water pump was being replaced.
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A spark plug question for those who have done the 3.4/7730 upgrade. Did you change to the plugs recommended for the 3.4, use the Fiero recommended plugs, or are they the same? I would think DIS would require a different plug than a conventional distributor ignition system.
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I am using the 3.4 plugs. Originally, the swap had the Fiero plugs, but one plug broke on removal, so all were replaced.
I do not see why the plugs would matter. Of course, knowing nothing about ignition and spark, this means little.
I can take a plug for a car and use it in my lawn mower. The gap may be a bit different, but I think DIS uses the same plugs.