Question about 1995 Chevrolet Blazer

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I have a 1995 chevy blazer that wont start by cranking it will start if you spray gas into intake was starting before bleeding the air out of fuel rails

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  • Jonathan S
    Jonathan S May 13, 2010

    This sounds typical of a fuel pump issue.The 4.3L engine uses a spider injector that requires a minimum of 54 psi of fuel pressure to start.If possible would verify that it has adequate fuel pressure and that the fuel pump is coming on. When cycling off and the key on you should hear a humming or whining noise which is very audible from the gas tank. If you are not hearing this may need to verify 12v power is getting to the pump.

  • wandawoods12 May 13, 2010

    thank you for the information should have said before we have already replaced the old fuel pump with a new one would appreciate any more suggestions

  • wandawoods12 May 13, 2010

    to clarify if the vehicle keeps on running after spraying gas into the intake it does not anymore suggestions would be helpful

  • wandawoods12 May 13, 2010

    to clarify if the vehicle keeps on running after spraying gas into the intake it does not anymore suggestions would be helpful

  • wandawoods12 May 13, 2010

    to clarify if the vehicle keeps on running after spraying gas into the intake it does not anymore suggestions would be helpful

  • Jonathan S
    Jonathan S May 14, 2010

    I would definitely check the fuel pressure again seems like pump is supplying enough fuel to run but not enough to start these 4.3 are very picky about that.It should be at least 54psi to start but can actually stay running on less

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  • Master
  • 1,297 Answers

Sounds like your fuel pump is dead or you still have air in the system

however, even if you had air in the system, it purges itself when you try to start

therefore, a weak fuel pump cannot overcome the air block and your car won't start

however, you did not specify if the vehicle will stay running once started on carb cleaner

if the vehicle starts and stays running with the carb cleaner then you are probably dealing with a defective fuel pressure regulator


Posted on May 13, 2010

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