2001 Lincoln LS vacuum leaks

2001 LINCOLN LS
71,000 MILES • 6 CYL • 4WD • AUTOMATIC
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ROZZZ9
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  • 1 POST
codes p0171 and p0174 and p0303 changed mass airflow sensor, oil and filter spark plugs, fuel filter, icd, o2 sensors on both sides. i hear a leaking like hissing noise when i start the car and it continues, car eventually idles up and down then dies. what is this
Sep 26, 2010 at 1:31 PM
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BLUELIGHTNIN6
  • ✓ASE Certified Mechanic
  • 16,542 POSTS
  • ASE Certified Mechanic
a hissing noise normally indicates a leaky vacuum hose. where is the noise coming from? engine compartment etc..?
Oct 20, 2010 at 9:22 PM
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