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J
P0303 Misfire only under load
98 K1500. Stock original motor. Have had truck for 15 years. Had this problem for a couple years now but just recently started digging into this to fix it. So here we go- Truck runs smooth everywhere EXCEPT going up hill(cresting a hill), going to pass on the freeway, merging, anything above...- Jacobchevys
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- Forum: Engine Performance + Maintenance
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kennythewelderOfficially Retired, B31-3 (6-G) certified welder.
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