I'm having a starting problem, when I try to start the vehicle I turn the key, let it turn over a couple of times,and then turn the key back. I have to do this 4 to 5 times until the thing starts(cold) when I turn it off after it is warmed up and try to start it after about ten minutes or so it just keeps cranking over, if I spray it with starting fluid it starts right up. so far I replaced the fuel sending unit, fuel pump, fuel relays, and fuel filter. any ideas? I'm heading towards changing the ignition switch because sometimes when I turn the key the starter doesn't engage. I'm already spending more money then I can really afford.

 

blazer

 

Have you done a fuel pressure test? If so, what are the figures?

 

fuel pressure 57 lbs when running, once it starts, runs great. don'thear fuel pump run until after I crank it a few times, hot or cold.

 

Okay, do this:
With the pressure gauge hooked up, turn the key to 'on', not 'start', and check the reading.
Turn the key to 'off' and watch the gauge for 2 minutes and check the reading.
After 10 more minutes with the key still 'off', check the reading.
Report back with the numbers.