An aquaintance has been to the dealer, numerous visits/hundreds of bucks spent with no fix for a miss fire (missing under load). parts replaced: plugs wires cap rotor serviced: injector(s) cleaned
Most recent scan showed a 5000+ count miss fire at #6 plug, with lessor numbers at #'s 1 2 3 and 5 4 being the only clean firing of the bunch.
I'm suspecting an ignition module or coil, but am not familiar with vortec components. Is the distributor mechanically driven from the cam, or is it strictly triggered from the ecu?
Two questions
1)Will a failing ignition module (so far not touched) set this code? 2)Will a failing injector pack set this code?Thanks in advance Rolf