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  1. J

    P0300 but seeing cylinder 4 misfire

    Been chasing this for too long. Started as #4 mis then went to a multiple cylinder misfire. Following list is items I have replaced to date. Spider injection, upgraded Cap, wires, rotor, plugs and cam position sensor ( Plugs are gapped at .45) Fuel filter Tps MAF Plenum gaskets, was in there...
  2. J

    Been lurking around trying to find answers. Here's my introduction.

    I have a 99 suburban 5.7 with 168k on it. Pretty decent for being in northeast NY haha. Lover of older vehicles, prior to the Burban I had a 95 Tahoe tbi, drove it till the frame was ready to snap. Attached is a picture of the Burban the day I towed my 83 z28 project home.
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