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So my 2012 3SA (MT) has been running great. It started up and ran great this morning. After work today, it started and instantly stalled. Started again, instantly stalled.
So, I gave it some gas, and it ran, but a little rough. If I feathered the pedal, it would run pretty nice at 3k and up to redline.
Below 3k, it would surge between 500 and 2.5k. Release the throttle and instant stall.
When I'm holding the throttle down to 3k RPM, the exhaust smells really rich.
Checked engine codes:
P0172 - System Too Rich Bank 1
P0101 - Mass Air Flow Sensor Circuit Range/Performance problem
Cleaned the MAF sensor with spray. Let it dry. Cleaned it again (as well as I can.. I'm used to seeing the sensor wire, but this one has a little tunnel where I assume the wire is). Let it dry. Reinstalled.
Started the car, instant stall.
I pulled the MAP sensor and it was covered in oil. Cleaned, dried, cleaned, dried, reinstalled.
Started the car, instant stall.
Removed negative battery terminal. Pressed the brake pedal five times. Replaced negative battery terminal.
Started the car, instant stall.
At this point I limped it home and it's in the driveway. While driving home, if the rpm was above 3k, it drove pretty much normal. Shifting was interesting due to it wanting to stall instantly.
The oil on the MAP sensor has me concerned a bit... Doesn't seem like it should be oily, but what do I know?
The P0172 code could also be a fuel injector leaking fuel into the cylinder or a faulty fuel pressure regulator (pressure too high? too low?)
(among many other things)...
Any ideas of what I should try next? New MAF? New MAP? Test the fuel pressure? Pull the injectors and do a leak down test?
So, I gave it some gas, and it ran, but a little rough. If I feathered the pedal, it would run pretty nice at 3k and up to redline.
Below 3k, it would surge between 500 and 2.5k. Release the throttle and instant stall.
When I'm holding the throttle down to 3k RPM, the exhaust smells really rich.
Checked engine codes:
P0172 - System Too Rich Bank 1
P0101 - Mass Air Flow Sensor Circuit Range/Performance problem
Cleaned the MAF sensor with spray. Let it dry. Cleaned it again (as well as I can.. I'm used to seeing the sensor wire, but this one has a little tunnel where I assume the wire is). Let it dry. Reinstalled.
Started the car, instant stall.
I pulled the MAP sensor and it was covered in oil. Cleaned, dried, cleaned, dried, reinstalled.
Started the car, instant stall.
Removed negative battery terminal. Pressed the brake pedal five times. Replaced negative battery terminal.
Started the car, instant stall.
At this point I limped it home and it's in the driveway. While driving home, if the rpm was above 3k, it drove pretty much normal. Shifting was interesting due to it wanting to stall instantly.
The oil on the MAP sensor has me concerned a bit... Doesn't seem like it should be oily, but what do I know?
The P0172 code could also be a fuel injector leaking fuel into the cylinder or a faulty fuel pressure regulator (pressure too high? too low?)
(among many other things)...
Any ideas of what I should try next? New MAF? New MAP? Test the fuel pressure? Pull the injectors and do a leak down test?