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Re: 5.3 Vortec Valve Spring
Posted to Technical Discussion Forum on 2/2/2016

Hi Mark, The plugs were fouled, and I changed them. Just forgot to add that...

I've never seen an AC Delco part bad out of the box either. I actually shot a video of the coil spark test while someone else cranked. I had to go back and look at it just to make... Login to read more.