2001 Honda Civic Check engine- too lean

KOLYA18

MEMBER
2001 HONDA CIVIC
4 CYL
FWD
AUTOMATIC
53,245 MILES

I'm having a problem! My check engine came on and the car is reading too lean! I feel there is loss of acceleration and when gas gauge goes below quarter the car starts to stall! Please tell me what the problem could be! I already checked the spark plugs and put injector cleaner in the gas! Thanks

Wednesday, July 29th, 2009 AT 3:48 PM

1 Reply

RASMATAZ

MECHANIC
75,992 POSTS

2001 Honda Civic Check engine- too lean

A lean fuel condition can be caused by:

* Low fuel pressure due to a weak pump or leaky fuel pressure regulator. (Use a fuel pressure gauge to check fuel pressure at idle)

* Dirty fuel injectors. (Try cleaning the injectors)

* Vacuum leaks at the intake manifold, vacuum hose connections or throttle body. (Use a vacuum gauge to check for low intake vacuum)

* Leaky EGR valve. (Check operation of EGR valve)

* Leaky PCV Valve or hose. (Check valve and hose connections)

* Dirty or defective Mass Airflow Sensor (MAF). (Try cleaning the MAF sensor wires or filament with aerosol electronics cleaner. Do NOT use anything else to clean the sensor, and do not touch the sensor wires)

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Wednesday, July 29th, 2009 AT 3:51 PM