I have a 2001 Merc 5.7 EFI/TBI. Had a no start issue this summer, got it back on land and started working on it. A few days ago I replaced the coil and coil wire. I did have to reposition distributor housing shaft and finally had it running. Today I went to dynamic time the engine, grounded the ignition base timing wire (purple/white, I believe that is what it's called) and went to start engine, no start. Rotated the distributor housing in different directions, still nothing. I then put a spart tester from coil to cap and had not spark. Coil is new so there must be something else going on. Any thoughts?