Engine & DrivetrainEngines and Drivetrains can be a major problem for a lot of vehicles. If you are having engine or drivetrain problems, you can post your questions/concerns about the issue. Furthermore, if you are in the process of doing an engine rebuild, post your progress with pictures.
Hi All,
I own a 2007 v6 mustang and last week the service light lit on and the car suddenly suffer a lack of power and hesitation on acceleration(rpmīs going up and down when i push the accelerator), this is not happening all the time, actually when i start using it, it works great, but after some miles it starts with the issues. I used a scanner to read the codes and it gives me the P0171 and the P0174. some one told me it could be caused by the gas pump...
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Ford Mustang 2007 P0171 and P0174 
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