1999 Chevy Lumina Engine wont start after fuel pump replace

Tiny
JB7386
  • MEMBER
  • 1999 CHEVROLET LUMINA
  • 6 CYL
  • FWD
  • AUTOMATIC
  • 199,000 MILES
Fuel pressure was not released from the injectors before tank and fuel pump removal. Fuel pump is working and sending fuel to filter but not going any farther. Pressure has been relieved at that injectors but engine will not start
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Monday, July 13th, 2009 AT 1:25 AM

7 Replies

Tiny
MHPAUTOS
  • EXPERT
Hi there,

Have you changed the filter? It may be blocked, of hooked up back to front

Mark (mhpautos)
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Monday, July 13th, 2009 AT 1:33 AM
Tiny
JB7386
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Fuel filter a couple of days before I took the tank and fuel pump off. Car was running fine before so I know the fuel filter is not on backwards plus there is only one way to put the filter on
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Monday, July 13th, 2009 AT 8:57 AM
Tiny
MHPAUTOS
  • EXPERT
Hi there,

If you are not getting fuel through the filter as you stated in your post, it must be blocked, also just check that the pressure regulator is ok, and that you do have injection pulse, this is a self bleeding fuel system.

Mark (mhpautos)
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Monday, July 13th, 2009 AT 6:22 PM
Tiny
JB7386
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Ok so let me understand this. I checked the fuel filter today and the fuel pump is sending fuel thru the filter with the correct pressure. No pressure is being released thru the schareder (?) Value located on the passenger side of the vehicle in between the power steering pump and the alternator. So am I understanding correctly that the fuel regulator can stop fuel and pressure from reaching the fuel rail and injectors? That in turn would be the reason for the engine not getting fuel to start? Thank you for clearing up that it is a self bleeding system.
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Tuesday, July 14th, 2009 AT 12:35 AM
Tiny
MHPAUTOS
  • EXPERT
HI there,

I am having some trouble finding enough information on this system, thinking about it logically, I feel that there must be a blockage in the system, lets go back to square one, have you actually fitted a fuel pressure gauge onto the test port? If not is it a Schroeder valve (same as a tyre vale) that you can unscrew and see if you have flow at that point? Have you checked for injector pulse? I don't believe that the regulator can stop flow completely, if you have pump pressure at the filter and flow through the filter I do feel its either a blockage or your injectors are not firing off.

Mark (mhpautos)
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Tuesday, July 14th, 2009 AT 5:08 AM
Tiny
JB7386
  • MEMBER
I have not checked to see if the injectors are firing. I do know that fuel is not getting to the injectors. Is there anything between the fuel filter and the fuel rail? If there is a blockage at this point, should I disconnect the hose at the filter and remove the lines from the fuel regulator and fuel rail and blow them out with compressed air? I dont understand why the system is not getting fuel when it was working before the new install. My haynes manual says that fuel pressure should be released before servicing the fuel system but it does not say what could happen if you dont and thats the problem, the pressure was not released initially it was done after the fact
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Wednesday, July 15th, 2009 AT 11:53 PM
Tiny
MHPAUTOS
  • EXPERT
Hi there,

They recommend to release the fuel pressure as a precaution as it is under high pressure, it is ok to just crack the fuel line to bleed off the pressure, I would remove the pressure regulator, (it should be removable) and see if you have flow with it removed, check for injection pulse never assume that things are ok, if you can remove the regulator and you have no flow still look for a blockage.

Mark (mhpautos)
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Thursday, July 16th, 2009 AT 12:15 AM

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