so i get home from werk, she's drivin like a champ...

change, hit the JO, roll out to score my pix from walmart, and my cel stays on after i turn the car on....

so i roll to the "zone" for my free engine light check... and dude told me im "runnin lean, bank one"...thats it.. he erased the code, and it hasnt come back (4 trips total)...

now, my a/f guage reads more than 1.0 at WOT,in 1st, 2nd, 3rd, and then drops a tad in 4th and 5th but still sometimes reads more than 1.0.
my ground is the ecu ground, and i have my power and 02 signal wires spliced at the wiring harness at the ecu...she don't fart black smoke at WOT, she;s just loud ;-)

i have the stock fuel system, fuel filter was changed about 15k ago..
gas mileage is the same as b4, ummmm..
intake mods (may affect the mixture) aem cai, 55mmtb, p&p mani, corbin's phelonic spacer...

egr is hookd up, ummmmm...

can anyone tell me why this could happen per the crap i listed ^^...

like always, and help/insight/suggestions is always appreciated :-D

tia

edit: one more outta the box idea is the climate... the car is used to 100+degree weather, and lately it has been 40-60 degrees at night... im goin on a whim, but could the cold air and the ecu's ability to not richen up the mixture per the denser/colder air create this cel???

vtecPOWA

I'm willing to place a nickle on your upstream O2 finally taking a shit on you.

Anyone else?

I'll second that.

aight, the car has 78k on it, and its a 99gs.... the rear 02 is still pimpin champ style (at least its never thrown a code, and i havent swapped it), and the front one is from the factory as well...

anyone got the autozone part# or dodge part#??

gracias... im still open to other suggestions

I don't know the part numbers but I know that there's an NGK univeral replacement that some guys run. I think you can get it at NOPIonline.com

bump... any part #'s or further sugggestions???

tia