1.8 jetta warms up and dies
 

so i just got a 92 jetta off a freind of mine who coulsnt get it to run
i replace the fuel pump after some research and vroom it runs
now the problem i am having its that after it starts and warms up it runs like crap
it will run fine coldbut when it is warm and goes to kick down for low idle it wont rev up much and sounds like it had a blown head gasket
im thinking its a sensor
anyone got any ideas?