trouble!!!!!!!!

[most-hated]

this only happends some times wen im driving my truck i it starts hesatating like a missfire and backfiring but then i full throttle it and itll go away then a lil after it comes back so i turn off my truck like for 5-10mins and its driving well again and wen the problem happends i get this code p0171 and p0174 which means system too lean bank 1 and 2 wat dose this mean wat can i do to fix this problem i already changed mas air flow sensors and nothing it keeps doing it from time to time and its frausteraring

[ff_jeff]

I bet the o2's are going out. Check fuel pressure, intake leaks, clean maf, check plugs. But sounds like o2 prob IMO

[SCIV]

What MAF did you replace it with?

You did a swap? Sounds like the grounds are loose, mine did the same thing.

[most-hated]

Prabaly its an 02 cuz all graounds are checkt or a leak dawm i have a headach wit this

[GasGuzzler]

Probably not an O2.

Kinda rare to have one go out on both banks. It's either lean from low fuel pressure or a vacuum leak, the tuner effed up hookin' you up on the engine swap, or you have long tubes that cool off too much before the O2's. Whatever it is, it affects both sides of the engine.

And yes, like above, what MAF did you replace the old one with....? A "tuned" one like a Granatelli crap pile?

LOL