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Hot air from the AC
Having a broken A/C is very unfortunate, not to mention uncomfortable. There can be several reasons why your Mercury’s Air Conditioning is blowing out hot air and you are correct to believe that the expansion valve could be one of...
Sporadic RPM surging while stopped in the traffic
Fault codes should be read out of the ECM on your 2006 Mercury Montego. All connectors on the engine harness and at the ECU need to be checked for condensation and/or water ingress as these will cause drivability problems. I...
Problem with the cruise control
Hey there, thanks for writing in about your 2005 Mercury Montego. Mercury has a technical service bulletin out for brake light switch being either faulty or not adjusted properly causing all kinds of cruise control issues. The brake lamp...
Bank 1 and Bank 2 running lean
If lean faults occur after the manifold was removed and reinstalled, this indicates a vacuum leak which also means that unmetered air is coming into the intake. Either a vacuum line or induction pipe is loose, or the manifold is...
Dual AC not working correctly
The charge level of the refrigerant may be low. If the refrigerant level is low then what could be happening is that all of the heat transfer capability of the refrigerant is maxed before the refrigerant can flow to the...
Dash lights, hard and noisy shifting
You will need to get the fault codes read for your 2005 Mercury Montego. From the description you've given, it either sounds like a possible induction system issue in the electronic throttle control or possibly a transmission malfunction. Based on...
Difficult to turn my steering wheel to the left, but not right
Hi there, The description you have given of the steering being hard to turn in one direction, leads me to believe, the rack and pinion is at fault. The power steering pump failure, would make it difficult to turn in...

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