P0171 Error code

[RIvey]

Hello all,
I've have a P0171(lean bank 1) error code that comes and goes, I replaced the 02 sensor, all 4 injectors but I'm at a loss on what to try next.

It's funny though, The light only comes on when I'm coasting down a long hill (on my way home, I can almost tell when it's going to go on)and it will go off by itself 5-7 days.

The only mod to the engine is a drop in K&N filter, (platinum plugs and new wires about 10K ago)

It's a '02 NA.

Any Ideas?[:I]

Thanks

[fritz_t_coyote]

Vacuum leak?
Check intake gaskets, hoses, fittings.

[quicksilverdon]

quote:Originally posted by fritz_t_coyote

Vacuum leak?
Check intake gaskets, hoses, fittings.

Agree. On downhill, vacuum should be high, and maybe it isn't because of a leak...

[RIvey]

Well it turned out that the dealer ran every test they had and the last part of the test said if all tests and sensors check out o.k replace the PCM.

It seems Chrysler had the same problem with their minivans last year and that was the fix for it.

Best part was 8/80 emission warranty:NO CHARGE
200 miles so far and no light