System too lean issue
I have a bit of a problem, and I wondered if anyone here would know what it could be.
My focus is a 2001 SE (2.0L Engine? The smaller crappier one.)
I just recently had my fuel filter changed. Now when I'm idle at an incline (uphill) the engine almost comes to a stall and will stall if idle for too long. The check engine light will eventually come on and with error code: "System too lean (bank 1)"
Here is my obdII read out:
p0171 - system too lean (bank 1)
fuel system: Open loop (system fault)
+17.2 Long term fuel trim (bank 1 & 2)
47.9 psi fuel pressure
MAF sensor .1lb/min
(engine idles between 600-800 RPM)
I *think* I hear a bit of hissing from the back of the engine, but I'm not sure.
Before having the fuel filter changed, I had to have my muffler reattached (it rusted through). I don't know if this could be causing the problem either as the technician somehow caught himself on and unplugged the dataline from the transmission to the system, I wouldn't be surprised he 'bumped' something else.
Keep in mind, I don't have tools/space/time to repair this myself, so I'll have to take it to a shop, I just want to make sure they are repairing the right thing. (and not ^ that shop)