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Discussion Starter · #1 ·
Anyone on here good with Silverado’s?

Need some input if anyone can help
2002 Silverado 5.3
Just bought this thinking it needed a fuel pump lady said she ran it out of gas and it never started again , I put gas in it, it has 55psi of fuel pressure, new plugs and wires it has spark.
Cranks but no start. Engine sounds healthy when cranking

-It will spit and sputter on starting fluid
- all fuses checked out good
-no codes on the dash
-did the passlock bypass and reset, nothing changed
-Checked injector pulse, it’s good
-injector resistance is good
-new injectors
-put 12v to injectors and they click
-changed cam sensor and nothing changed
  • new crank position sensor
  • shows 130 rpm cranking
-checked grounds they all look good besides the one on passenger side by cam sensor, some of the coating is pulled up but wires don’t look corroded or broken
- still has 55 psi at the fuel rail
Pulled the new spark plugs out and they don’t smell like gas
 

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Check the fuel pump relay also known as the accelerator relay. Should fire right up as long as you have spark and a working fuel pump
 

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55 is right on the bottom of the spec (55 to 62); but it should be ok.
Your problem points to fuel delivery, 2 reasons:
  • hasn't started after running out of fuel.
  • sputters with starting fluid.

Did you drop the tank and check the pump?

There is also a fuel pressure regulator, sorry, I don't know where yours is located
 

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Discussion Starter · #5 ·
55 is right on the bottom of the spec (55 to 62); but it should be ok.
Your problem points to fuel delivery, 2 reasons:
  • hasn't started after running out of fuel.
  • sputters with starting fluid.

Did you drop the tank and check the pump?

There is also a fuel pressure regulator, sorry, I don't know where yours is located
I just checked out fuel pump, it seems to be okay other than the screen is pretty dirty but can’t be to bad if I have 55 to the rail, it comes off to me that the injectors arent spraying would the regulator be the cause?
 

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The regulator just regulates the fuel pressure.

You should be able to hear the injectors clicking
 

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dont put that back in the tank! if your that far replace everything you can. I don't know what those weird particles are but they dont look good.

is this also the fuel filter or is there an external fuel filter?

on my old trucks the fuel pressure regulator is in the intake. I have no idea where it is on this one though and I have never worked on one of these trucks.
 

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you can jump the injectors individually with a 9v battery for testing purposes. you can do it on the vehicle and check fuel spray.
 
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