My 97 t100 recently has not started, it has a new gas pump and a new tank. The engine tries to start but it never does and if it does it idles for 10 sec and dies again. What could it be?

 

Major vaccum leak..

 

Check for spark, check fuel, check loose cables connecters, check relays and fuses, lastly check compression.

 

I cleaned the maf sensor, it starts a little better, how can i check for a vac leak?