Car : 2013 Ford Fiesta 1.25 L
1 code : lean mixture
Readings :
- negative STFT
- above 10% LTFT
- both oxygen sensors readings are normal
- car is consuming aloooot of fuel
- Check fuel pressure
- test for vacuum leaks
Clean the MAF sensor and also clean the injectors.
It doesn't have a MAF sensor, it has a MAP sensor, should i clean it?
The owner told me he already tried one of those injector cleaner products, didn't work
I cleaned the pcv valve, drove it for a couple of minutes, and then checked the STFT and the LTFT, they were back to normal, and no engines codes, but i am not sure if that's enough
Clean the MAP sensor and also make sure it works fine. The other thing would be pressure cleaning the injectors. How many miles on the car?
After cleaing the PCV valve, he drove it for like 70 miles, gas milage got lil better, it didn't trip any codes, but it's consuming an above normal fuel quantity
When he bring it back, i'll check the MAP sensor, i don't have the tools to pressure clean the injectors
The car has 240.000 KM, whichbis about 145.000 miles
And btw this thing began after a timing belt change, and they rechanged it again and again and the problem didn't go away
Have you changed the spark plugs?
For the pressure cleaning, you should find a mechanic to do. You can also try a BG cleaner can if you can not find someone to do the pressure cleaning.
Yeah the spark plugs are new
We don't have the BG cleaner in my country, he tried injector cleaner and it didn't work
I'll look around maybe i can find a mechanic whobdoez pressure cleaning
What is the code to got?
P0171 : system too lean
P0171 : system too lean