Random misfire

By Michael Hastings
February 4, 2020 in 1969-1994 Chevrolet K5 Blazer & GMC Fullsize Jimmy

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Michael Hastings

Posted February 4, 2020

06 HD 2500 6.0, CEL GOES OUT WHILE UNDER LOADS. At idol Cylinders 1,3,5 & occasionally 4 start to misfire. #1 has the highest misfire count and most actively misfiring followed by #5 than #3. Engine is at operational temp. Of 209dF. All injectors are new. Individually isolated all coils non are weak or dead and all plugs are firing wires are new MSD with metal boot caps ad original. Any help would be appreciated

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