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Old 06-13-2016, 12:45 PM   #1
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Join Date: Mar 2016
Location: Rocky Mount NC
Posts: 130
Wore-out Old Spark Plugs

So Saturday I replaced the spark plugs in my '81 C10 with the 250 inline six. Here's what they looked like... that's cylinders 1 through 6 from left to right.

Now I know that a dry, light-brown deposit means normal operation... but there are limits!

Truck is running somewhat stronger now at low revs, thanks to six new AC/Delcos.
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