[crazypete]

By "wont crank", do you mean it is not turning over or it wont kick in? I had an intermittent starting problem to the effect you descibed. It was nothing more than the main power terminal on the starter becoming corroded. It would crank sometimes, sometimes not. One day it stopped cranking altogether. I would never have found the problem if the starter wire had not started smoking!

For fuel pressure, just unbolt the regulator, place an inverted clear plastic cup over it, stand back and energize her! If it's a mighty spray, you've got pressure. If it's a little dribble, you dont. It's not very scientific, but it's free and convenient and lets you know if you are in the ballpark. As for the injector, unscrew a sparkplug, disconnect the coil wire and aim a flashlight into the cylinder and crank her. You will either see a little spray or smell it (or it will puff through the open plug hole). To diagnose a weak starting system due to bad ground or power, pull out _all_ the plugs and disconnect the coil wire. The engine will now offer no resistence to turning over (since there is no compression) . It will sound like a mingun and should tach at a constant rpm....like 400-500. If this works but it didnt work before, get some 80 grit and get down where the starter primary wire is, unbolt it, sand both the terminal and the wire connector and reattach. Do the same at the starter relay.

If all this fails, it's one of those silly modules, I had my TFI module go out on me a few years back for no apparent reason. I hate electronics, this is why I went carb (and I'm a programmer, I'm supposed to like computers).

Good luck!