Raw fuel in intake manifold / vacuum lines
Hi all,
I own a 1999 Mecury Mystique, 2.5L V6, 24 Valve DOHC. So far it's been a great car and I've enjoyed the experience! Recently it broke down with several issues that we're in the process of fixing / figuring out. One particular issue that I'd appreciate some guidance on is this: We've found a significant amount of raw, liquid fuel inside the intake manifold http://bldouglas.com/etc/car/1.jpg We noticed this while taking it off, because liquid fuel drained out the pipe in the top right of the picture there. We also noticed fuel in some vacuum lines http://bldouglas.com/etc/car/2.jpg Potentially relating to this problem, the exhaust O2 sensor needs to be replaced - And upon doing so, we found what we'd call a heavy/excessive amount of carbon build up on the sensor. It's probably hard to see in the picture - But when we first pulled it out, it had a relatively thick coating. Some has already been wiped off in this picture http://bldouglas.com/etc/car/3.jpg We have a home OBDII reader, and here are the codes we got off the engine if it may help diagnose anything Error Codes P0155 - O2 Sensor Heater Circuit P0156 - O2 Sensor Circuit P0401 - Exhaust Gas Recirculation Flow Insufficient Detected P1520 P0171 - System Too Lean P0302 - Cylinder 2 Misfire Detected P0301 - Cylinder 1 Misfire Detected P0161 - O2 Sensor Heater Circuit P0174 - System Too Lean P0303 - Cylinder 3 Misfire Detected Any advice on what may be causing this fuel problem or anything you see would be of much appreciation - Thanks in advance! |
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