Suzuki: 95 geo tracker 16valve vin 6 5spd manual, mass air flow sensor, mass air flow

Question
when i was given this vehicle i had  a former coworker attempt to install a new gm water pump new timing belt and radiator in to no avail all he did was completley mess everything up and i had to take it to a guy whom usually does all my work he spentseveral hours getting the engine back to were it would run he told me he had to advance the timing to get it to run correctley and at that time i had new wires dist cap rotor  all new hoses new 195 degree tstat new tps new egr valve new egr modulator  my problem is when the engine gets hot the idle sometimes is fine other times will stall out  i have a new idle air contol valve which is not installed yet and am considering if i should also replace the mass air flow sensor i want to get it too idle correct and suggestions or solutions you maybe able to point in the right direction would be a great help.  thanks alot

Answer
I had a sidekick, (same thing as a tracker) for a while, and I found that even as an experienced technician, It was not possible to accurately diagnose and properly adjust the engine without a factory manual.
Mine was a 92.  I gave the manual to the new owner when I sold it, and no longer have access to the info.
All I can say is check each system/component using the factory manual/procedures.
It's possible the idle air control valve is at fault, but without having it here, along with a manual, I couldn't say for sure.