engine problem

2001 CHEVROLET IMPALA
170,000 MILES • 6 CYL • 2WD • AUTOMATIC
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HAZELEYES18
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  • 1 POST
we have a 2001 chevy impala, while idleing at red lights or in traffic it will stall, exhaust is uneven and there is a loud tapping sound coming from the engine which gets loader when u accelerate... what could the problem be?
Feb 3, 2011 at 7:08 AM
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JACOBANDNICKOLAS
  • ✓ASE Certified Mechanic
  • 110,194 POSTS
  • ASE Certified Mechanic
As far as the idle, check for vacuum leaks. Also, check the idle air control valve. If the check engine light is on, have the computer scanned. Most parts stores will do it for free.

The noise could be many things. A knock can be caused by a engine bearing, belt driven accessory... You need to locate a more specific area that it comes from.
Mar 3, 2011 at 1:13 PM
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