1978 Fuel Injected Superbeetle Tune Up Problem

Hi,
Just got car. It was running somewhat roughly. Changed points, plugs,
condenser & wires according to instructions in Muir guide and Chiltons.
Checked and rechecked gap settings, etc. Car is now barely starting. If
gas pedal is COMPLETELY depressed, it eventually revs up to MOST start, but,
if you take your foot off of the pedal, it dies immediately. Will not idle.
When pedal is depressed, it has the sound as if it is "building up" or
"revving up" with fuel. Any suggestions would be appreciated.
Thanks much!!