Question about Chevrolet Malibu Maxx

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Loud engine noise, similar to an airplane.it is present at any speed. Car vibrates and does not accelerate as quickly as it used to.

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  • aoc2954 Aug 02, 2008

    I don't get the loud noise in all gears, but I do get the vibration, the noise is all from the drivers side.

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Hello,
Well for the accelerator problem check for plugged cat converter, make sure engine has coolent and check thermostat/waterpump. check for short in wiring to temp gauge.check temp sending unit,if you have scan tool check for codes and correct if any...

Also for the loud noise ,assuming it doesnt appears when the engine is idle it could be a collapsed lifter. a compression test would help figgure out which cyl it is...you can find specs for this engine on the net...valve clearence is set by removing valve covers, back off rocker nut till rocker clacks, tighten nut till it stops clacking then turn a half turn slowly....hope this helps you out..

Thank you...

Regards!!...

Posted on Aug 02, 2008

  • Natesan Sabesan
    Natesan Sabesan Aug 02, 2008

    Okie well if thats the case please go with the compression test to find the noise and to fix it...

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I need more information...

Where exactly is the sound coming from?

I will respond further...
Brian

Posted on Aug 02, 2008

  • 3 more comments 
  • Brian Berndt
    Brian Berndt Aug 02, 2008

    Is the check engine light on? Does it do this in Park or Neutral or when in gear only?

  • Brian Berndt
    Brian Berndt Aug 02, 2008

    I would advise that you look for a loose belt first. This may cause the above problem, and is easiest to diagnose. You could buy a product called belt dressing, and spray on the belt pulley while running and see if the noise changes. Also a bar of soap can do the same thing if you can access the belt with out harming your hand!



    This will help rule out the belt as the problem.

  • Brian Berndt
    Brian Berndt Aug 02, 2008

    If not the belt, next check the car with the A/C off, this will help see if the A/C compressor is causing the problem.



    The fan would be the next step, see if you can tell if the noise is coming from the fans (they are electrical).



  • Brian Berndt
    Brian Berndt Aug 02, 2008

    If your problem exists with the transmission in gears other than P, you may have a transmission problem. You should not drive the vehicle, if this is the case.



    Torque converters are known to give way first, then they give off debris that is harmful to fluid lines, and cause erratic operation of the vehicle. This would need to be looked at by a trained transmission mechanic.

  • Brian Berndt
    Brian Berndt Aug 02, 2008

    Please have someone help you.



    Have engine on. Engage Emergency brake. Have assistant outside vehicle, and listen low to the ground.



    Engage the transmission into D. Step on the brake, and slowly step on the Gas (lightly).



    Have the assistant listen for the source of the sound. High pitched whine could be the transmission, and is very serious.



    Other noises, if you have already tried the other items I listed above, could be internal engine problems, and need a mechanic to properly diagnose.

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