so 1st of all my fuel level gauge doesnt work, may be unrelated. so i keep up with my miles and fill up when ive gone about 250 miles. A few days ago my car died, i thought maybe i somehow ran out of gas. i put gas in...no luck. had a friend come get me with his enclosed trailer and take it to his shop. i thought the fuel pump was bad and put in a racetronix 255. The car started up fine and i drove 20 minutes home. The next day i started my car to let it warm up, and when i come back out of the house its not running, key is still on. I hit the key and it started right up. The car died one time on the way to work, but i turned the key off and back on and it started right up. On the way home from work the car died and will not start.

So...Car cranks but does not start.

Fuel pump does NOT prime.(no noise, no pressure at schrader valve)

I think maybe an extreme overheat condition will kill the fuel pump....but its not hot.
Extreme low oil level may cause the fuel pump to be shut off....but its got plenty of oil.

 

fuel pump relay?

 

i switched the fuel pump relay with the air pump relay(known good) and no luck

 

pull up a wiring diagram for the fuel system,and check your ground.

 

Where can i find this? By the way the fuel pump relay clicks when is turn on te key but the fuel pump does not......

 

i would say the fuel pump is shot, you can try have someone bang on the fuel tank from underneath with a rubber mallet while someone cranks the engine. i have done that in the past to diagnose a bad fuel pump. also you can remove the relay and see if you can jump the terminals to power up the pump.

 

I just put a brand new fuel pump in...

 

you can get a bad one even brand new. it has happened. did you put a bigger fuse or upgrade the wiring for the fuel pump as the 255 draws more amps

 

Or perhaps you have tons of debris in the tank.. May run fine for a while till cruise once all the debris settles on the sock filter..
Just my $0.02...

 

If you just put in a new pump... Look for the obvious first.

Im pretty sure you didnt solder/heatshrink the power or ground wires. Maybe a crimp pulled out. Either way double check your work again.

 

The problem started before I put in this new fuel pump

 

...and the car works fine today. what the heck? Turn the key and the FP turns on for 3 seconds. Then the car starts up fine.

 

And i'm stranded again today. Any theories?

 

No clue. You should think about ordering a racetronix pump harness.. This might solve your issues..