98 Chevy Cheyenne will start but dies if you give it gas?
The possibilities can be many. It can range from a
malfunctuioning fuel pump, to a bad throttle position sensor, to
faulty fuel injectors. First I would check the throttle position
sensor since this is the cheapest part, and also the easiest to
replace. The throttle position sensor tells the computer how much
air and fuel to put in the engine. If it is messed up it can cause
hesitation, stalling, transmission buckoing, etc...