I’ve replaced my fuel filter regulator both pumps rebreather fuel injectors and still my 1995 ford f150 4.9l will not start right off the bat I have to turn the key on wait a hour and go start it and it fires up I don’t know where to go with this or what to look at no fuel leaks does anyone know what I should look for

 

You should measure the fuel pressure of the shrader valve located on the fuel rail. Pressure specs for you 1995, should be 30-45 psi. You can do it during a no start condition too. If that checks good, start checkiing the ignition system for an intermittent loss of spark.

 

how would u check for the loss of spark

 

When the engine refuses to start, you can use an old spark plug or a spark tester available at you parts store. Sometimes, I just clip a timing light on a plug wire.

 

What happens if you put the pedal to the floor hold it there and crank for a few (maybe several) seconds?

 

All that will do is shut off the injectors.Worth trying if you believe the engine is flooded out.

 

this
https://www.harborfreight.com/in-lin...SABEgIYYvD_BwE

or remove one spark plug and lay it on the intake for grounding and spin engine over to check for spark