Volkswagen Repair: vw van, fuel pressure, alternator

Question
hi there i have 89 vw van that starts but as soon as i put it into gear to move it dies out or does not have enough power to move, i just raplaced the alternator could that have messed something up or to do u think its a fuel filter or pump or something thanx

Answer
Spence,
 It is possible you have low fuel pressure, but the list of other possibilities are long.  Sorry, I do not know the fuel pressure specs for an 89 VW Van.  However, the reason the alternator was replaced may have the answer:  Is there low voltage to the ignition system?  Before starting the battery should show about 12V.  After starting you should see about 14V coming from the alternator.

Rick