Hi Can I ask for Opinions?

[yelgnissm]

Hi I'm an American living in the Philippines, and I have a really beautiful and clean 2000 Expedition XLT.

It is running perfectly, EXCEPT it is starting on the second crank, not the first.

Service engine light came on, and we read the codes, which were the lean 171 and 174 codes. The recommendation was to clean the Mass Air Flow Sensor.

The environment is very dusty, and hot. Plus there was a massive volcano eruption 20 years ago and there is a lot of pumice dust around.

1. I cleaned my Mass Air Flow Sensor with the correct cleaner, and now the service engine light is off and staying off after a 100 mile trip.
2. undid the battery cable for 15 minutes, and light is staying off.
3. Car has new plugs, new gas filter, new oil change, etc.
4. I've run a few bottles of injector cleaner through it, and we are using higher octane gas to just hopefully clean out any issues
5. Battery is brand new.

Why is the car possibly still starting on the second crank like it's lean?
Not sure if the computer just needs a few cycles to reset itself.

Any help is welcome!

 

[stamp11127]

Check the fuel pressure.

 

[bedrck46]

P0171 - System to Lean (Bank 1)
P0174 - System to Lean (Bank 2)

For lean and rich DTCs:
Fuel system
Excessive fuel pressure.
Leaking/contaminated fuel injectors.
Leaking fuel pressure regulator.
Low fuel pressure or running out of fuel.
Vapor recovery system.
Induction system:
Air leaks after the MAF.
Vacuum Leaks.
PCV system.
Improperly seated engine oil dipstick.
EGR system:
Leaking gasket.
Stuck EGR valve.
Leaking diaphragm or EVR.
Base Engine:
Oil overfill.
Cam timing.
Cylinder compression.
Exhaust leaks before or near the HO2Ss.

 

[Lightnig]

Rough idle? P0171, P0174? Here's what you need to check first!!!

 

[YoungKraze]

Check the fuel pressure and maybe try doing a tune up?

 

[tonydiv]

When was the last time the fuel filter was changed?