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Old 02-24-2019, 01:45 PM   #71
68 P.O.S.
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Join Date: Jan 2007
Location: Puyallup, WA
Posts: 1,661
Re: Intermittent power loss (need help troubleshooting please)

Glad you got it mostly figured out. What a pain. Make sure you gap your plugs to 0.045 for HEI. The hesitation you still feel could be the step-up springs or the accelerator pump. How much vacuum does the engine pull at idle?
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72 C10 lwb fleetside -stock 350/350 combo
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