Question about 2000 Chevrolet Blazer

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Just changed the intake manifold gasket...drove fine for about 5 miles total...then died while accelerating..cannot get it to turn over at all

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  • rich25davis0 Feb 04, 2010

    fuel pressure is good but because it wont turn on i cant get it to a place to check fault codes..is there another way to do the test

  • rich25davis0 Feb 04, 2010

    no. not even one revolution

  • rich25davis0 Feb 04, 2010

    just changed the intake manifold gasket..ran good for a few miles...stalled during acceleration..wont turn over at all...spark plugs are dry ...batterty and alternater are both ok..

  • rich25davis0 Feb 04, 2010

    ok ill try the key thing....if it is the igniton switch would that cause a stall in the middle of driving

  • rich25davis0 Feb 05, 2010

    the manifold was removed to replace a blown gasket...and before the gasket relacement the car did die while accelerating but was always able to turn over and eventually start up..my concern is that the head gaskets are actually blown but the spark plugs are dry and i would think i would at least get some sort of turnover

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4 Answers

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  • Master
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Why was the intake gasket replaced? Just curious. Since the intake was removed and many engine managment components were either dis-connected or removed, a good place to start is check and recheck all the connections and to be sure no connectors were left off or loose. I am assuming the engine ran good for the most part, before the intake removal, and the engine never died suddenly before the intake removal. Is the fuel pump at least operating to prime the fuel system when the ignition key is turned to the on position???

Posted on Feb 05, 2010

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  • Chevrolet Master
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When u Say it "won't turn over at all" do u mean the starter doesn't spin the engine over? also have u done the most basic tests here, fuel pressure and OBD 2 electronic engine control fault code tests, this engine has electronic fuel control and ignition control it is done through the computer (known as the "PCM"), in most cases when you have a stall and the starter does turn the engine then there should be a fault code in the memory of the PCM. so do the tests and get back to me.

Posted on Feb 04, 2010

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  • yadayada
    yadayada Feb 04, 2010

    the only way to test is with a scanner or inexpensive code reader fro OBD 2, older models u could but not since 1996 without code reader or scanner, u still don't say if the starter works? does it spin the engine over?

  • yadayada
    yadayada Feb 04, 2010

    have you tried reseting the passkey factory VATS security system, that may be the problem, if u go under the truck and jump 12 volts to the purple wire at the starter solenois it should spin over, if it does the passkey is the problem most likely, try a reset.

    do this 1st.





    PASSKEY LOCKOUT RESET ALL GM CARS 1999 AND UP

    1) Put the key in the ignition and turn to the "ON" position. Leave it that way for 10 minutes. After 10 minutes turn the key and take it out. Repeat this process (2) more times (3 times, 30 minutes total) This should reset the PASSKEY system to recognize your key.




  • yadayada
    yadayada Feb 04, 2010

    this problem can also be caused by the ignition starter switch at the back of the ignition lock cylinder, in fact that is the most common problem with this year, this switch is oprone to failure, u loose power to the igintion system and the starter won't engage. here is the switch and the part number.



    STANDARD MOTOR PRODUCTS Part # US343 igntion starter switch $76.79




  • yadayada
    yadayada Feb 04, 2010

    I am out of this, u don't give the solution a chance beofre giving me the thumbs down.

  • yadayada
    yadayada Feb 04, 2010

    if you want to really fix this give me a call if u are in USA 925-577-7157

  • yadayada
    yadayada Feb 05, 2010

    yes and give me a call on this

  • yadayada
    yadayada Feb 05, 2010

    I thought we had this straight?

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  • Chevrolet Master
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There are several possibilities and I am guessing you mean the motor acts locked up, not that the ignition is dead.

If your intake manifold included water jackets to the ports its possible that the intake gaskets failed and the antifreeze went into the combustion chamber upon acceleration. After 5 miles the thermostat would have opened for the first time and the radiator would have been pressurized for the first time with the new gaskets. Now you have HYDROlock. You can remove a few sparkplugs and see what they look like. If they are wet, then that is what happened. You can drain the radiator and pull the sparkplugs and the engine will push the water through the sparkplug holes while it cranks.

Then you need to remove and install new intake gaskets. If this is not the case, and the plugs are good it is another cause. You may have a wire burnt, a fuse blown, due to a wire which grounded after the engine was running. Sometimes you can leave a deposit on tools at Autozone or Oreillys and borrow a scanner. Using a scanner on your diagnostic plug should pinpoint the problem. Check your owners manual for fuses to the ignition and ECU. Would be interested in knowing the outcome of this case.

Posted on Feb 06, 2010

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It sounds like either the front or rear seal of the intake manifold has been sucked in the motor causing a vacuum lose causing the engine not to start

Posted on Feb 04, 2010

  • frank thomas wilson
    frank thomas wilson Feb 05, 2010

    check all vacuum lines and vacuum switches mounted on the engine as well

    you may have a bad seal also which was installed

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