Cold start issues/running rich

2006 FORD CROWN VICTORIA
123,000 MILES • 4.6L • V8 • 2WD • AUTOMATIC
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PUGLAS868
  • MEMBER
  • 1 POST
I am throwing all types of codes p0171, p0174. After I removed and plugged vacuum lines going to sensors on EGR it threw a p0106. Smoke tested intake manifold resulted in EGR leak placed in a block off plate to see if it helps threw p0108 and p0109. I know there is sensors on top of the EGR that measures exhaust and intake gasses. I am trying to throw as many related codes as possible to determine faulty EGR. I was wondering if my solution of a brand new $180.00 EGR is it MAF was replaced.
Dec 8, 2018 at 5:36 PM
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STRAILER
  • ✓ASE Certified Mechanic
  • 54,832 POSTS
  • ASE Certified Mechanic
Hello,

It sounds like you have a partially clogged catalytic converter. To confirm the issue check out this guide:

https://www.2carpros.com/articles/how-to-test-a-catalytic-converter

Please run down these guides and report back.

Cheers, Ken
Dec 10, 2018 at 4:45 PM
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