Still having problems with a couple cylinders not firing all the time at idle, resulting in a miss. It idles Ok on startup then when it goes to normal idle, the missng starts. It all started after we did a full monty tuneup including fuel injector service, new plugs and wires, cleaned the TB,changed the fuel filter,etc. I installed a MSD TBF ciol and am waiting for a set of 8.5mm wires to try that. The truck runs like a bear under accelaration and at high speed. Any ideas? Also as a side note: I can buy a complete set of 24lb injectors for our Mustang for $225, but injectors for the 351 are $50.00 a piece, does this sound right?