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CVPI 4.6l is making whirring noise during acceleration.

The engine makes a very noticable whirring/friction noise while accelerating from 40-60 mph to a higher speed. Almost always does it while passing or accelerating uphill. Hard acceleration from 0 to 60 is completly fine and constant. Punching the acellerator while at cruising speed is the issue. Tips are most appreciated.

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6ya6ya
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Posted on Jan 02, 2017

eitan
  • 291 Answers

SOURCE: Engine Making Noise when accelerating

Could be carbon build-up on the pistons, causing erratic flame travel in the combustion chamber... 'pinging'...... Decarbon the engine and use a high grade fuel for a few tanks.... also an octane booster can help

Posted on May 15, 2008

  • 48 Answers

SOURCE: the car will not accelerate;

this sounds like 1 of 2 possible problems.
a bad headgasket or a clogged catalytic convertor. i would lean more towards the convertor

Posted on Jul 16, 2008

  • 1 Answer

SOURCE: 2001 Buick Regal, 3.8L, 98,000

This happened to my 2001 Regal... There is a factory recall on the Catalytic Converter going bad. I had mine replaced with the recall and haven't had a problem since

Posted on Oct 10, 2008

  • 1 Answer

SOURCE: hesitation during acceleration

could be the type of plug you are using.I was told only to use ngk plugs.I recently put bosch plugs in my mazda 3 and the check engine light came on and it started missfiring.

Posted on May 03, 2009

  • 534 Answers

SOURCE: Engine noise while accelerating

Check the exhaust system for catlytic converter blockage.

Posted on Jul 10, 2009

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