spark plugs
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Tuned
Joined: Apr 2011
Posts: 298
Likes: 4
From: Highland CA
spark plugs
Hey guys I have a question,I have a 390, with a 2bbl holly carb and a Mallory uni lite electronic conversion kit, the question is wen I am cruising and I let go the accelerator pedal my truck kinda troughs explosions not loud but you could hear like thunder rumble.I was thinking of adjusting the idle out about a 1/8 of a turn, sense my spark plugs need a little color they look kinda white like if its running lean, what do you guys think i could do to add color to the plugs, and to solve the rumble sound of the explosions. thanks in advance
Elder User
Joined: Oct 2011
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Not an expert but this might help.
How to Read a Spark Plug: 7 steps - wikiHow
http://www.classic-car-magazine.co.u...ide_chart.html
What are your plugs gapped at? If your running a hotter iginiton you might need to gap plugs slight more than normal.
How to Read a Spark Plug: 7 steps - wikiHow
http://www.classic-car-magazine.co.u...ide_chart.html
What are your plugs gapped at? If your running a hotter iginiton you might need to gap plugs slight more than normal.
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