This reminds me of my similar issue several years ago. It had to do with the main wiring harness, (common '93 problem) but it was an extended warranty matter. Also I had a coil pack die two weeks ago, just like flipping a switch. This was a perfect constant miss. I replaced the coil pack, problem solved.

__________________
....just drive'em!
'89 300TE White w/Blue, 152K SOLD!
'93 300E Blue w/Tan, 154K SOLD!
'01 E-320 4-Matic wagon, 130K
'67 Vette Conv. White w/Blue, 217,421K