Cranks will not start, possible fuel system issue

1999 CHEVROLET TAHOE
155,000 MILES • 5.7L • V8 • 4WD • AUTOMATIC
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BURBANBOY
  • MEMBER
  • 5 POSTS
Hello, I recently bought the SUV listed above off a guy that gave up on it after he couldn’t get it started. it cranks but won’t start. He said he replaced the cap and rotor, the fuel pressure regulator and he said he tested the fuel pressure and it read 50 psi. When you turn the key you can hear the fuel pump turn on, when I sprayed brake clean into the intake it started right up but shut off 10 seconds later. Checked all the fuses and they are good, what do you guys think?
Apr 26, 2020 at 10:39 PM
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ASEMASTER6371
  • Experienced Mechanic
  • 52,796 POSTS
Good morning,

You need a fuel pump. You need a minimum of 60 pounds for it to run. I attached the spec for you to see.

https://www.2carpros.com/articles/how-to-check-fuel-system-pressure-and-regulator

With a new regulator, that leaves the pump itself.

https://www.2carpros.com/articles/how-to-replace-an-electric-fuel-pump

Roy

REMOVAL PROCEDURE

CAUTION: Refer to Battery Disconnect Caution in Cautions and Notices.

1. Disconnect the negative battery cable.
2. Relieve the fuel system pressure.
3. Drain the fuel tank.
4. Remove the fuel tank and sender assembly.

DISASSEMBLE PROCEDURE
1. Note the position of the fuel pump strainer on the fuel pump.
2. Support the pump with one hand and grasp the strainer with the other hand.
3. Rotate the strainer in one direction and pull off the pump. Discard the strainer after inspection.
4. Inspect the fuel pump strainer. Replace the strainer if it has contaminates and clean the fuel tank.
5. Inspect the fuel pump inlet for dirt and debris. If found, replace the pump.

ASSEMBLE PROCEDURE

NOTE: Do not fold or twist the strainer when installing the sending unit. This action restricts fuel flow.

1. Push on the outer edge of the ferrule until fully seated.
2. Support the pump with one hand and position the new pump strainer on pump in the same position as noted during disassembly.

INSTALLATION PROCEDURE
1. Install a new seal, sending assembly and lock ring. Make sure the lock ring alignment notches fit over the tabs on the tank.
2. Install the cam lock assembly. Turn the cam lock clockwise to lock it.
3. Install the fuel tank.
4. Add fuel removed from the tank.
5. Connect the negative battery cable.
6. Check for fuel leaks.
6.1.Turn the ignition ON for 2 seconds.
6.2.Turn OFF the ignition for 10 seconds.
6.3.Again, turn the ignition switch to the ON position.
6.4.Check for fuel leaks.
May 4, 2021 at 5:09 AM
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BURBANBOY
  • MEMBER
  • 5 POSTS
Thank you! He said it was the injectors but I didn’t suspect that after I got it running off the brake cleaner. picked up a fuel pump that fixed it.
May 4, 2021 at 5:09 AM
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