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Chevy Blazer Starting and Stalling Problems

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Comments

  • iamthoriamthor Posts: 2
    Well, I fixed it...It turned out to be the fuel pump. I replaced it and it fired right up with no issues. Lesson learned...fuel does not necessarily mean that the fuel pump is good.
  • Remember: Dead or Dying Fuel Pump Will Not Give A Code.
    90% of the time, the stalling issues will end up being a fuel pump.
    The fuel pump is like any other electrical motor. Take the starter for example.
    If you find the starter is burnt out, you can some times strike it with a small hammer or anything else with some weight, and you might get it to start again.
    Now why none of the car companies will put a sensor on the fuel pump, is beyond me. It would actually be a simple thing to do and would stop alot of the heartache.
    Something like this:
    Key is put into ignition mode-No gas pressure? Send Error Code.
    Key is put into ignition mode-No electric signal passing though? Error Code.
    I can do this with simple programming to a microcontroller, yet none of the billion dollar car companies can add this feature into the system?
    Now one other feature that could be very simple to intergrate into any vehicles system, The Code Read-Out onto a 0.50 cent LCD panel possibly on the fuse box, instead of having to take your broke down vehicle to any shop or car parts store to have it scanned.
    Why don't they?
    Because the car companies want you to pay top dollar for all of the repairs, the diagnostics and possibly get you back into the dealership to purchase a new vehicle.

    FUEL PUMP PEOPLE, And prepare to pay out atleast $600.00 for a new one isf you vehicle is a 1998 or newer.
  • i have a 95 blazer changed fuel tank fuel pump sending unit fuel lines spider and fuel regulator and fuel filter.It will just crank for 5 to 10 sec until the oil pressure gets to 20 then starts right up. I was thinking there is a rollover switch or something that is bad but can't find any info on it.
    Runs great just wont start till 20 pounds of oil pressure.I dont hear the fuel pump at all when i turn the key over to try to prime it.Just have to crank it till it hits 20 pounds oil pressure then starts right up.It is quite annoying any help would be much appreciated thank you
  • dagimstsdagimsts Posts: 1
    edited August 2013
    Hi I am all new to this blogging, However I may have the solution to your problem, generally the Gm system has two circuits to the fuel pump, one with the relay that primes the system for those first 10 to 20 second of cranking the engine and the second one through the oil pressure switch that activates as soon as it reaches operating oil pressure.
    You mentioned that you can not hear the pump when the key is turn on and that is a good indication that there is a problem with your fuel pump circuit (relay, wiring or fuse). try to get a wiring diagram for your fuel pump circuit through your local GMC dealer most of the time they will print it for nothing for you, that will help you out with your problem.
    Hope this will help you out.
    dagimsts
  • can some of yall help me my 2003 s10 stutters and back fires at mid to heavy loads.... heavy heavy loads and it takes off like a bat ...if i punch it taking off it will burn the back tires but the let off it will backfire once or twice then stutter all the way down to 2k rpm then soothes out
    as far as starting it it will turn over twice then be running i replaced the mass air flow sensor.....very little help i have a job that starts in a week and i really need this truck running
    so i dont have to borrow dads and listen to his crap..... oh it has a 4.3 L vortex v-six
  • syco4syco4 Posts: 1
    try to check the timing chain might be warn remove belt and dis cap move harmonic balancer back and for to check for slack
  • i like your answer, I often wondered that myself.
  • my 04 blazer was running with battery pack on it to charge. whent back little wile after and it wasn'trunning. cantget it to start back up. has spark and gas. sounds like pressure being released after a few cranks but no egnition

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