p0171 & p0174, or was..

[Eric.m]

So i had p0171 & p0174 but the car ran fine. Maybe a bit less power, but its kind of hard to tell if I had some with such a small engine Anyways, I ran some seafoam through the engine and that cleared the p0174 code, but I still get the p0171. I cleaned the Maf which made the SES light come on 50ish miles later than normal, but after I cleaned it again, I did not have as much luck. Any thoughts? I'm pretty such its not a vacuum leak. Also, one more thing is that I have a very serious loss/lack of power when I start in cold weather for about 25 yards or so.

[skeeter123]

FSM says P0171 is: Mixture too lean. Possible causes:

intake air leaks
front O2 sensor bad
injectors clogged/not working
exhaust gas leak
incorrect fuel pressure
lack of fuel
MAF sensor

check easy things first like fuel pressure, fuel filter.
Hope this helps.