Been having alot of issues with fuel pressure suddenly. Jumped in after driving all day and couldnt start. Had no issues before this. Only 1 check engine code p0420 catalyst system. Got a cat back and replaced o2 sensors and it was fine. So far ive Replaced the fuel pump, filter, and pressure regulator.
Now im stumped on what it could be. Pump was replace once before by prev owner 2 yrs ago.
Sprayin starter fluid in throttle body gets a start but it dies as soon as fluid burns off.
Any ideas on a possible problems ?

 

My guess would be a crank sensor or MAF sensor. Unplug the MAF and see if it will start.

If it's getting fuel pressure, then it could be what I mentioned or the Ignition Control Module.

 

Still no start ,it cranks but sounds like its not getting gas fuel pressure still too low. I cleaned the maf and throttle body as i was taking them off to replace the regulator. Not really a way to check the position sensor but it should have thrown a check engine code right ?

 

No, I had 2 crank sensors go bad on me and not a single code for either.

You need to test the fuel pressure to see how much you're getting.