Fuel Pump, Car Stalls at Idle

[a745035]

I have heard about bad EGR/lines causing these issues. It'll definitely be one of the first things I try.

Here are the CEL codes that I got:

P0137: Oxygen Sensor Circuit Low Voltage Bank 1 Sensor 2

P0157: Oxygen Sensor Circuit Low Voltage Bank 2 Sensor 2

P0171: Bank 1 System Too Lean

P1171: Fuel System Lean During Acceleration

P0174: Bank 2 System Too Lean

Honestly, before I try anything I'm going to go ahead and reinstall my old injectors to see if maybe the new injectors are the problem. The car only started acting this way after I swapped out the injectors so maybe that will fix the issue. Hopefully will have an update by Saturday night.

I'm getting the 3 codes below on my '01 Foxfire. (90,454 miles)

P0137: 02 Sensor Circuit Low voltage Bank 1 Sensor 2
P0157: 02 Sensor Circuit Low voltage Bank 2 Sensor 2
P1171: Primary Fuel Pump Insufficient/No Fuel Flow

I've replaced both aft 02 sensors and cleared codes, only to have all 3 return. Don't want to rush replacing the cats just yet but the deadline for emissions testing is coming up and I'm wondering if a lean condition (P1171) can CAUSE the downstream sensor codes? (seems unlikely that both would go bad at the same time.)

She starts, runs and accelerates fine. Visited a local muffler shop this morning and explained the scenario. The owner adamantly stated aftermarket 02 sensors are garbage, and that they must be OEM for this vehicle. (but I got the exact same codes as the original after the swapping them out.) I suspect there are different codes for NO communication with the computer vs. reporting LOW voltage, but I'm no expert. I'm going to change the fuel filter first and clear codes again to see if there's any change. If not, checking fuel pressure will be next. TIA for any other advice or suggestions.

[jimmyray]

did your issue get resolved? Soonds like an intermittant fuel pump issue