I have a P0172 code and the car runs really rich.
The following has been tested and I believe is not the problem.
MAF sensor - replaced
FPR - replaced
Plugs/wires - replaced
Throttle body - cleaned
Tstat - replaced
Injector o-rings - replaced
Other tests that have come back clean:
O2 sensors operating properly
Checked back-pressure for clogged cat
Fuel Pressure okay
Injectors seem to be injecting more fuel than what seems normal. Is this just due to the fact that it is supercharged? Or could that be the problem. The reliable mechanic that did the test for me said he is not 100% sure if this is just because of the supercharger so I thought I would ask you guys. He said it was slightly more than normal and seemed a bit inconsistent.
Any other possibilities would be greatly appreciated!!!
Other symptoms:
Worse when it is hot. Upon hot restart the rpms surge really bad.
Seems like when you are coasting (like down a long hill) the rpms surge especially when you hit bumps and once in a while the car will die all together.