My 98 LSC feels like it wants to die for a second when u mash the gas off the line. While in park if mash the the gas it will also do the same thing but when the rpm's come down it dies out. Spark plugs and boots have been changed less than 10K ago and fuel injectors also have been cleaned. The car was checked for codes and none were found.

Greg 98 LSC 66K

make sure the mass air flow sensor is clean. Ive seen them get crudded up and give bad readings.