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Old 06-29-2017, 10:37 PM   #4
Custom 68
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Join Date: Nov 2001
Location: Springfield, MO
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Re: Misfire on throttle but not at idle?

Quote:
Originally Posted by akdg87 View Post
What plugs do you run? Have you checked them out, could be that one was cracked on install?

I would get some BR7EF plugs (NGK 3346) and gap them at .028, if those arent available you can use the TR6 plugs.
Mine was doing this and swapped plugs like said here and tightened up the gap. It a whole new truck now
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1968 Custom Chevy with turbo charged 5.3 gen III 4l80e swap
1967-71 GMC 3/4 ton long step 4x4 (not sure what year exactly?)
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