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Have 1997 Mercury Mystique with 2

Tiny
ANONYMOUS
  • MEMBER
  • 1997 MERCURY MYSTIQUE
  • 121 MILES
Have 1997 Mercury Mystique with 2.0 -4cyl, auto trans about 121k miles. Started ideling rough, wanted to die at stops. Check engine light came on after about a week. Had codes read, "P0171" came up. Website suggested cleaning Mass Air Flow Sensor w/ spray. Carefully removed MAF sensor, cleaned and reinstalled. CEL was off and idel went back to normal. For two days. Now light is back on, ideling low, wants to stall at stops. Any ideas that won't cost a bunch of money I don't have will be appreciated. Thanks.
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Tuesday, March 26th, 2013 AT 1:28 AM

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Tiny
RASMATAZ
  • MECHANIC
  • 75,992 POSTS
Clean out the idle air control valve and see what happens
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Tuesday, March 26th, 2013 AT 1:36 AM
Tiny
RASMATAZ
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Also check for low fuel pressure, vacuum leak and EGR valve operation
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Tuesday, March 26th, 2013 AT 11:05 AM

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