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Old 12-07-2012, 08:08 PM
89k1500 89k1500 is offline
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Vaccume is in the green on the guage. Wires are good/no miss at idle and goes good in first and second. starts backfiring when it has to work a little harder because of the taller gears in third.

not hearing any lifter noise and I think tht would show up on the vaccume gage(?) and cause a miss.

Could be timing related possibly... Not sure where it should be set at with this set up.
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