2002 tracker just changed alternator, and accidentally touched wrench against metal, a few sparks, now my Tracker will start and run for 1 second and die, everytime. I've replaced every relay, fuse, sensor, still starts and dies immediately.

 

I'm assuming you were attaching the battery wire to the alternator stud (red arrow above) and the wrench
came in contact with the frame. See red line below



If that's the case, then only the 80-amp battery fuse would have been in danger. None of the
other fuses (or sensors) should have been affected by that brief current spike. It is possible
(but not likely) a sensor may have been damaged by the radio frequency burst from the
sparks. But most sensors monitor engine performance and send data back to the PCM
to optimize performance. Few sensor malfunctions stop the engine from running. And if
a sensor is bad the PCM is likely to report that as a trouble code. Don't paint yourself into
a corner by assuming a slip of the wrench caused the current problem. Start with the
basics: air, fuel and spark. Which one is the engine not getting? Do you have a scanner?
If there are no stored trouble codes, I would start with fuel. Check fuel pressure first.
36-43 PSI key ON engine not running for the 1.6L and 2.0L.
39-45 PSI for the 2.5L.

 

The complaint is: starts, then stalls. My gut feeling is it's running out of gas. With the Key On, Engine Off (KOEO),
the fuel pump (inside the gas tank) should run for for about three seconds then stop. The sound of the pump
running will be audible. If working correctly, that three seconds will pressurize the fuel rails enough for the the
engine to start. After the engine starts, the PCM has to restart the fuel pump. If that doesn't happen the engine
would quickly die from fuel starvation.


This is a simplified fuel pump schematic. The PCM controls both the Main and Fuel Pump relays.
The best test of the fuel system would be to observe a fuel pressure gauge when the engine dies.


If you suspect the fuel pump is not being commanded on by the PCM, you could pull the fuel pump relay
and run a fused/switched jumper from the battery to pin 2 of the relay socket. Close the toggle switch
and start the car. If the engine runs, you've isolated the problem.

 

It occurred to me (belatedly) the easiest way to determine if this is a fuel issue is to spray starter fluid into the throttle body when the engine starts. If if keeps running, you have a fuel delivery problem.

 

After reconnecting the battery following a starter change, my 2001 V6 would crank but not start. I tried spraying starter fluid into the throttle body snorkel but it would not fire.
Thinking it may be flooded I left it sit overnight but it still would not start in the morning. I tried to force it into "clear flood" mode by holding the gas pedal to the
floor and holding the key in START. After about ten seconds the engine came to life and then died. Convinced it was a fuel problem I held the gas pedal half-way
down and again held the key in START. I could hear it was trying to fire every five seconds or so. After about thirty seconds of continuous cranking with the
pedal slightly depressed, the engine came alive and kept running. I knew the short-term fuel trims would be erased when I disconnected the battery but I never
expected that the car would not restart. Anyway, after it finally started, the car seemed to drive normally and had a smooth idle but it still has a few quirks. I don't
know how long it takes to restore the fuel trim values so I'll watch it for the next few days. I mention this because it sounded a lot like the original posters complaint
and because starter fluid did not help.