Mass Airflow Sensor on 2002 Ford Escape

my car bogs down going up hill...the rpms go up but i have no power have already changed spark plugs have been told it is my mass airflow does that sound ligit

by in Johnson, VT on February 18, 2009
4 answers
ANSWER by on February 19, 2009
Have you checked the trouble codes? This can be caused by several thing, so you should start with codes, check fuel pressure, and check the exhaust back pressure before replacing parts.
ANSWER by on April 21, 2009
I am going through the same thing, all I can say is it looks like the EMG Valve and/or the EGR Pressure Sensor. My ran like **** for 4 months, then the Valve blew out, replaced it and it blew out again within 24 hours. Now I am told it is the EGR Pressure Sensor. Check it out!
ANSWER by on April 19, 2010
Yes, also check your coils, and you catalytic converters.
ANSWER by on June 07, 2010
Had the same problem, took the escape to a mech and he replaced the rear catalytic converter. The engine regained all power and has been running fine for the past 9 months. No issues after the replacement. Mech said it was a good thing it was not the catalytic converter(s) off the exhaust manifold or it would have been expensive.
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The light comes frequently again shortly after clearing. Is there a known common problem giving that OBD code?
I'm sorry the troubleshooting code was P0171 this was the only code there were, Thank You.

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