Step 1: Go through the ignition system thoroughly. Make sure the points have the proper gap, they aren't pitted or corroded. Make sure the dwell angle is within spec. Make sure the timing is in spec. Check the plugs to see what color the deposits on them are. (Grey or white is too lean, black and sooty is too rich, tan or brown is good.)
Step 1a: While you've got the spark plugs out to look at the deposits, run a compression check. Look for fairly even numbers across the cylinders, all above 100 or so.
Step 2: Look at the vacuum and fuel hoses and make sure they're hooked up to the correct places. Check
http://www.pelicanparts.com/914/technical_specs/914_20FI_diag.htm for where they should be.
Step 3: Go read
http://www.914fan.net/djet.html . Re-read it. Go through it again. Print it out, take it to your car, and read it while you look for the various components and grok what they do. Then start going through the procedures outlined in it and checking all of the FI bits.
This should at the very least give you some idea of what is going on.
--DD