2001 Chevrolet S-10 Won't start

2001 chevy s10 4.3

Won't start. Cranks over fine and will run for 2 seconds up to 500rpm than dies off right away. I can do this 20 times and same results but than all of a sudden it will fire up and run fine like nothing is wrong. I changed the fuel pump a couple weeks ago and I just checked the fuel pressure I have 52psi and it will hold pressure for longer than 5 minutes with no drop so it's not leaking down anywhere. Obd code p0404 comes up (egr malfunction) should I replace the egr?