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Whistling noise when accelerating

Tiny
LSERRANO
  • MEMBER
  • 2001 BUICK CENTURY
  • 6 CYL
  • 120,000 MILES
I ahve replaced EGR VALVE. Plugs and wires, gas filter and transmission fluid. Car is hesitating and is hard to move, when accelaerating there is a loud whistle noise, one place tells me it's the catalytic, one place tells me its the transmission, bought the catalytic but do not want to install if that is not the problem, please help !
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Sunday, September 18th, 2011 AT 4:54 PM

1 Reply

Tiny
DRCRANKNWRENCH
  • MECHANIC
  • 3,380 POSTS
You probably have a vacuum leak. I usually take a piece of thread and drag it around mating surfaces, e.g. intake manifold to throttle body, to see if it sucked towards any mating surfaces. Of course look for bad hoses.

Below is a lik to help diagnose vacuum leaks.

https://www.2carpros.com/articles/car-whistling-noise

I hope this helps.
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Sunday, September 18th, 2011 AT 11:36 PM

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