Question about Chevrolet Blazer

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No start 95 blazer

No start unless u pump gas pedal ...then have to keep pumpin to stay running fuel psi is....56psi started off by runnig rough no is to this

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  • brandon walters Jan 14, 2013

    ok pump shuts off as it should... hooked scanner up to it no dtc's shows fuel relay workin and injector is firing acorcing to scanner.

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  • Chevrolet Master
  • 21,873 Answers

Sounds like low fuel pressure.
A GM vortec engine needs at least 65 psi to start and run.

Posted on Jan 15, 2013

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Posted on Jan 02, 2017

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  • 1118 Answers

SOURCE: 1991 gmc jimmy over fueling at start up, it wont

Sounds like the relay is not shutting off fuel pump. Turn the key to on position ( not start ), pump should only run for a few secounds and you will hear a click and pump should shut off, if it keeps running relay is bad. If it works like it should than fuel regulator (if there is one) would be the next posability.

Posted on Apr 08, 2009

  • 52 Answers

SOURCE: 2000 chevy blazer will not start unless we pour

You most likely have no power to the injectors when switch is initailly turned on. Sometimes this is caused by a sticking oil pressure switch. Check wiring diagram to see if power source is through this switch.Hope this helps God Bless

Posted on Sep 18, 2009

  • 740 Answers

SOURCE: service engine soon is on. truck runs rough

well with out a trouble code there isnt much help you are going to get online. go to your local advanced auto or parts store and have them retrieve the code or codes from the pcm. if you can't get the van to the parts store you can rent a code reader from most part stores

Posted on Dec 29, 2009

  • 635 Answers

SOURCE: 1999 pontiac sunfire -- only will stay runnig if

Check your idle air control valve.

Posted on Mar 31, 2010

  • 20 Answers

SOURCE: fuel pump keeps running when i turn on the key im

chek the fuel regalater on the back of the fuel rail. it has a rubber hose to it.and even if you can here the fuel pump dosent mean it isnt weak.

Posted on Apr 25, 2010

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1 Answer

I ran out of gas in a 1997 Chevy Blazer, put gas in, but still won't start.


The fuel filter may be to dirty to let the gas flow through and will need to be replaced, or most common when you run out of gas is the fuel pump will burn it self out. The fuel in the tank will keep the fuel pump cooled and will keep it from burning out, if you ran it out of gas. The pump may have burn out and will need to be replaced. Check the fuse first and hope the fuse blown due to the extra amp drown from the pump running without fuel. If the fuse is good, then check to see if you can hear the fuel pump start up when you turn the ignition key to the run position. Note the fuel pump will only energize the fuel line for 5 seconds, so you need to listen for the pump to turn on right away. The other thing too, is you can check the fuel pressure at the shredder valve, there should be 62 to 65 PSI when energizing the fuel line and will drop around 5 PSI when the engine is running. Make sure you do not try to start the engine by pouring gas down the throttle body, it been know for the gas to catch fire in the intake manifold and burn up the fuel injector system which is very costly. Start with the simple and check the fuses and fuel pump, then replace the fuel filter. At worst, your going to have to replace the fuel pump by dropping the gas tank and don't forget to replace the wire harness from the fuel pump to the frame. Good luck and hope this helps, keep me posted. Be glad to know you got your Blazer running again soon.

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1 Answer

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Check the fuel pressure regulator. generally "failure" position is full open which will richen up the fuel mixture. also check vacuum line to the regulator for cracks and good connection.

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1 Answer

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