86 -- Do a compression check, and clean off your plugs...
I did that to my truck tonight which was experiencing similar symptoms, and now it runs like a real V8, you shoulda hear me giggle like a little school girl at the roar that truck makes now, lol
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1995 Chevrolet 2 Door Tahoe (6.6L LBZ Duramax / ZF6 / NP241 with 1 ton solid axle swap)
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