Suzuki: car dies randomly, suzuki sidekick, lean mixture

Question
I have a 1997 Suzuki Sidekick  4*4  2 DOOR 1.6LTER   tHE CAR HAS BEEN IN THE SHOP MANY OF TIMES     THE CAR WILL RUN FINE FOR A WHILE BUT THEN IT WILL JUST RANDOMLY DIE ON YOU.   YOU CAN TRY TO START IT UP BUT IT WILL BACKFIRE.   YOU SHUT IT OFF AND WAIT A MIN AND IT STARTS RIGHT BACK UP.  SOMETIMES IT WILL RUN FOR A LONG TIME BUT SOMETIMES YOU CAN GO TWENTY SECONDS THEN IT JUST DIES.   DO YOU HAVE ANY SUGGESTIONS ON WHAT IT COULD BE.    WE ARE KINDA LEANING TORWARD A EGR VALVE, COULD THAT BE A CULPRIT.?

Answer
RE: EGR VALVE .... As I remember, it's vacuum operated, so disconnecting the vacuum hose would disable it temporarily.
Backfires, is a symptom of either a lean mixture (fuel delivery inadequate due to a lack of fuel to the injectors due to low pressure (plugged filter, marginal pump, or pressure regulator OR crossfiring in the distributor cap, or as you suggested EGR Valve.  Or something I haven't thought of yet......
scotty