If you are getting a Lean code then it is probably being caused by the intake plennum gaskets. This is a common problem on the Windstar. The fix is relatively easy.
If the car is have issues accelerating it may be running to lean. Ensure the engine is using the proper air to fuel mixture so the car will not run lean.
Put some fuel injector cleaner in a tank of fuel. Replace the fuel filter and fix any vacuum leaks.
The lienholder is under no obligation to pay for repairs - that's on you, as the lessee.
p0171 andpo174 mean that you're car is running lean
14.7:1 --- Air : Fuel Ratio. perfect. not lean, not rich.
yes they can do this they just put another lean holder on the car same thing with a house
it sense oxygen come out from your engine to tell the PCM your car is running rich or Lean
If any car backfires it is usually due to retarded timing, running lean or a problem in the valve train.
Assuming this vehicle is fuel injected, you may have a vacuum leak or a plugged fuel filter.
How to fix bank 1to lean on a 3100 v6
Take it to your local garage and have them fix it.