12 valve

  1. C

    Cold Weather Misfire

    I’ve got a 1973 Chevy Crew Cab with a 12-valve p-pump Cummins swap, and the motor has around 90,000 miles on it. Lately, I’ve been dealing with a misfire that only happens during cold weather. The issue is entirely temperature-related because it goes away completely once the engine is warmed up...

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