My 97 catera is mis-firing, I have removed and ohm'd the coil (it is with in specs,both the primary and the secondary) I have ohm'd the plug wires, all 13k or below. I tried a different coil today, no help. The cylinder banks 2,5 fire fine, banks 3,6 fire fine, bank 1,4 are not. The tower #4 is okay but tower #1 is producing no spark. It does the same thing with a known good coil. I ohm'd the wires between the coil connector and the ecm, they are good. Could the crank sensor or the camshaft sensor cause a problem? voltage at the B+ coil connector is 13.41 running. I even tried to run 1&4 from the #4 tower but it still feels as if it is running on 5 cyl. No power and shakes when idling. I took a reading with my fluke in rpm mode, cyl one is erratic as heck. When you rev the engine the reading drops off to 0.

bump this back up this is what my car is doing what did you do to fix it.its exactly the same thing when you rev the engine it 0's out