1998 FORD CONTOUR PO171 AND PO1131

  • Tiny
  • Kakes68
  • 1998 FORD CONTOUR
  • 4 CYL
  • 2WD
  • AUTOMATIC

OH the horror. I have a 1998 ford contour se 4cyl. I am pulling a P1131 and PO171 code. I have fuel pressure between 30 and 45. I have replaced the front O2 sensor the air filter the fuel filter, the spark plugs, cleaned the MAF, replaced intake gaskets and one faulty vacumme hose. Reset the computer and THAT DARN LIGHT came back on! Oh and did teh carb clean test for varience in motor when sprayed over and around vacumme hoses and get no varience. Whats left? Where do I look next to find the problem?

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Thursday, July 21st, 2011 AT 8:29 PM

3 Replies

  • Tiny
  • Rasmataz
  • MEMBER

Rescanned the computer for code/s again and post them

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Friday, July 22nd, 2011 AT 12:04 AM
  • Tiny
  • Kakes68
  • MEMBER

Dear Rasmataz, These codes are after I reset the computer and drove it. As soon as I got it on the freeway the check engine light came on. The LT and St Fuel
trim are at 0 and I get P1131 and PO171. What have I missed?

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Friday, July 22nd, 2011 AT 5:52 PM
  • Tiny
  • Rasmataz
  • MEMBER

Lean fuel condition could be caused by one of the following below:

1. Vacuum leaks
2. EGR and PCV valve.
3. Low fuel pressure.
4. Dirty fuel injectors.
5. Mass Air Flow Sensor.
6. Oxygen Sensor.

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Friday, July 22nd, 2011 AT 8:50 PM

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