Needs jump started to start because something is draining my battery that I bought in August of 2020 (same with the alternator) and when it starts it Revs full throttle for about 5 to 6 seconds and then shuts itself back down. I put a little fuel in the throttle body as well, but I know that cannot be the issue, because for a good 8 months I had to pour a little fuel in the throttle body to get it to start in the mornings and would never have an issue with it breaking down or dying on me before. Seems like a very odd problem Im hoping one of you may be able to shed some light on it. Its also a 98ZR2
​​​​​​

 

How about posting a video of the vehicle (engine) starting and then stalling. Can't make heads or tails out of your current description, but it sounds like a possible fuel pump issue. Not sure where the battery and alternator come in if it will crank over with the key.