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Dan
Dan, Technician
Category: Ford
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Experience:  Independent Shop Experience, 2 Year Automotive Diploma, & Access to Information Database
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burn too lean bank 1&2

Resolved Question:

burn too lean bank 1&2
Submitted: 6 years ago.
Category: Ford
Expert:  Dan replied 6 years ago.

Welcome to JustAnswer, my name is XXXXX XXXXX I'm here to help get your problem resolved. Ask follow up questions, thanks.

 

Replace PCV valve with one from dealershp and very carefully inspect vacuum line giong to pcv valve for leaks. If problem is still there clean mass airflow sensor with approved cleaner and check for vacuum leaks in lines and intake gaskets. If problem is still not found monitor fuel pressure, if low replace filter, if still low replace pump. If everything is good up to this point replace mass airflow sensor. Let me know if you have questions, thanks.

 


Fuel Pressure
Pressure 1 (PSI)Pressure 2 (PSI)Pressure 3 (PSI)
RangeNoteRangeNoteNote
35.0 - 45.0Y17130.0 - 45.0Y172Y173
Y171: System pressure with ignition on, fuel pump running.
Y172: System pressure, idling.
Y173: Fuel pump pressure.

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