You might pull off the SPOUT plug and see if you have spark then. If you do, them it could be the computer or its power fuse/relay etc (EEC power).

If not, I agree that the TFI ignition module is a likely suspect.

If you have to replace it:

- screw heads are 7/32 ( I think) which ARE 5.5 mm. You also have to find a thin socket to fit in there.
- make sure that you put the thermal grease on the back of the new module -- you should get a little dab with it.
- On some of them, one of the screws is grounded -- or so I've heard.

Otherwise check the usual suspects, pickup in the distrib and the coil.

Good Luck,