P0171 Code help (1 Viewer)

[fl4031003]

Been chasing this code for months, plugs also show too lean. No vacuum leaks, tested fuel pressure and air ratio both in spec. Any ideas? It’s a 97 1FZ with only 156k

 

[zapatius]

Cleaned or replaced the MAF?

 

[fl4031003]

Cleaned it and replaced the 02 sensors

 

[zapatius]

Cleaned it and replaced the 02 sensors

Only other thing I could suggest that you've probably already done is check intake for leaks and make sure everything is tight on the air cleaner. Also service the injectors.

 

[60 toy ota]

Pressure and flow are different, how are your fuel and air filters?

 

[fl4031003]

Fuel and air filters are new OEM

 

[fl4031003]

Pressure and flow are different, how are your fuel and air filters?

Good point, Ill check the flow