"System Too Lean (Bank 1)" What would cause this? Clogged fuel filter? Weak fuel pump? Dirty MAF? I really don't want to hurt my baby by driving it too much with this still a condition. Any suggestions?

 

I would get some fuel injector cleaner. I would change the fuel filter since it's cheap and I would clean the throttle body.

Since it's running lean I wouldn't drive it hard.

 

Just curious, where is the fuel filter located on the G35s? I remember reading there's only one and it's in the fuel tank? Not sure...

 

I was under the same impression. I thought it was a PITA to change.

 

did u get the fuel hose/indicator replaced through ther recall. Sometimes the sending units fail on the G... I would start there. That would explain the lean

 

if i take it to the dealer, would they cover it under warranty?

 

Fuel filter is part of the in-tank pump assembly. I changed mine last year.

The best fuel system cleaner you can get (that I know of) is BG K44. Great stuff! It's ~$25 a can but well worth it. Many dealers use it and charge ~$100-150 a can.

 

hmm i havew this same exact problem and autozone told me it was the first O2 sensor?

but im not really sure

 

ray catena in edison said its covered under warranty. appointment on tuesday! will update