This is topic P0171 AND P0174 FORD ESCAPE in forum Tech Talk at Northern California Ford Owners  .


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Posted by macthizzle (Member # 3492) on :
 
Bank 1 and bank 2 running to lean and are about 25 percent.
 

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Posted by jo_arce02 (Member # 11777) on :
 
unmetered air getting in there and the computer is trying to make up for it. try spraying brake cleaner around the intake manifold and or vacuum hoses. also check the intake boot after the MAF or any hoses coming off that boot to the valve cover.
 

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Posted by macthizzle (Member # 3492) on :
 
DTC for which Freeze Frame was Stored
P0171,P0174
Fuel System 1 Status
Closed Loop
Fuel System 2 Status
Not Supported
Calculated LOAD Value
24.3 %
Engine Coolant Temp
207.00 °F
Short Term Fuel Trim - Bank 1
11.7 %
Long Term Fuel Trim - Bank 1
25.0 %
Short Term Fuel Trim - Bank 2
10.9 %
Long Term Fuel Trim - Bank 2
25.0 %
Intake Manifold Absolute Pressure
8.6 inHg
Engine RPM
763 rpm
 

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Posted by hurting your feelings (Member # 13641) on :
 
Pcv and the house for like to leak.
 

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Posted by SacStangDriver (Member # 8304) on :
 
smoke test it before you do anything else. check for vacuum leak.
 

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Posted by macthizzle (Member # 3492) on :
 
It has been smoke tested. Test showed no leaks, Can a dirty fuel filter cause this?

The truck runs fine I just need to pass smog. Rpms stay around 700 at idle. I don't know what else to check.

[ 2016-04-06, 08:32 PM: Message edited by: macthizzle ]
 

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Posted by ford521 (Member # 14321) on :
 
Assuming its a V6 , very common for lower intake gasket/orings to shrink up ...may not see it in a smoke test. Also check for dirty Maf sensor will cause same thing
 

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