98 S10 Blazer will not start

I have a 98 Blazer that was running fine until yesterday when it cut off on me going down the road and would not start back. Had it towed home and have checked to make sure it has the correct fuel pressure(62 psi). The fuel pump and fuel filter were just replaced 2 months ago. Less than 3000 miles on those replacements. If you prime it with gas it will try to start until it runs out of the primer gas. It has spark, although it is a yellow spark and not blue. Any ideas where I should start to look for the problem? The pcm is not showing any trouble codes.


Any ideas are very welcome
Thanks
Cat

Your problem sounds fuel related if it tries to start with fuel in the throttle body. try using ether to start it and keep spraying when it starts to keep it running if it does then you know for sure your problem is fuel related. try a new filter sometimes junk gets left in tank when people change fuel pumps. try testing fuel injectors and pressure regulator.

You need to check your fuel pressure to ensure that its not leaking. With the ignition switch on. You should have 61-65 lbs of pressure. Engine running should be 60-66 lbs pressure, pending on the load. Ignition switch off, your pressure should not drop below 55psi within 5 minutes. If it drops below 55psi before 5 minutes. You’ll need to check to see if your injector or Fuel regulator are leaking. If no leaks are found, Then do a full fuel pump test. A quick test is to block off the return line and see if fuel pressure comes up to 75-85 lbs.