ran great with only intermittent starting problems then got worse especial if it was a warm engine, one day it stalled in a parking lot and only restarted enough to putter across the lot then no restart.
came back 2 days later started first lick then drove great all the way home. even restarted back well. 10 mins later no start.
so, I tore it down. and replaced a bunch of stuff and still no start. it will however run as long as i spray starting fluid or gas in throttle but dies unless its fed gas and some of the air is restricted by putting Ur hand over the throttle hole.
it has all new

injectors (all 4)
new fuel pump.
ect
spark plugs
cam sensor
crank sensor
battery is good
only codes are catalyst below efficiency bank 1
also cleaned grounds and then I got a p1106 BARO performance code but it cleared off and never came back. I've done a lot of fiddling with this engine hopefully it just popped up bc that and not an ecm prob. also i do not have a multimeter or other ways to test fuel and other systems besides a basic code reader, but to the best of my knowledge and investigation all relays and fuses are in working condition. I've recently been investigating the vacuum system for bad valves and such incase of fuel air ratio problems but I'm inexperienced with vacuum lines but i can run a basic smoke test using a fluid transfer pump and a stogie from gas station lol

 

Bad main fuel relay(s)?