[zdrepaul]

getting multiple misfire code (p0300) on 98 GMC 1/2 ton V6 with 135000 miles. chgd the plugs, cap, rotor, wires are ok, Auto Zone tested the coil and it checked out ok - from what they can tell (they're not experts at this). getting spark on all cylinders. it runs like it's only firing 4 or 5 cylinders - really weak / loss of power. any ideas????? please help -this is only vehicle in family of 3 (baby). thank you.