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mercury cougar: spark plugs..fuel filter..filter tps..air filter…

Customer Question
I have a problem will...
I have a problem will my mercury cougar 2001 will 107340 miles when the engine gets warm it acts like it not getting gas then it will start skipping the have replaced the spark plugs and wire also fuel filter tps valve the fuel injectors and the air filter   but when i go up hills it act not get enough gas and its starts skipping i have not changed my fuel pump and the gas grage dont work some times it will work if it wet or cold out i also replace the fuel rack sensor
Submitted: 8 years ago.Category: Mercury
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Answered in 5 minutes by:
6/26/2010
Mercury Mechanic: scottz136, Mercury Technician replied 8 years ago
scottz136
scottz136, Mercury Technician
Category: Mercury
Satisfied Customers: 1,940
Experience: senior master lincoln mercury tech.
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Thanks for the Question.

I recommend looking to the MAF(mass air flow) sensor.The sensor is located in the air intake hose from the air filter to the throttle body.Cleaning the sensor will occasionally help but replacement is usably needed.

Other than that,you will need to check for fault codes to see if there are any problems seen by the PCM.

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Customer reply replied 8 years ago
I have it put on the machine the code was fuel rack failed and cylinder 2 missed fired
Mercury Mechanic: scottz136, Mercury Technician replied 8 years ago
Do you have the code numbers?Not sure what you mean by' fuel rack failed'.
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Customer reply replied 8 years ago
no i don't remember what that was
Mercury Mechanic: scottz136, Mercury Technician replied 8 years ago

I suspect that the misfire may be cause by a faulty injector driver circuit failure or driver.The driver is integrated into the PCM,so checking the circuits from the PCM to the injectors will be needed first.If the circuits are fine,the PCM will need to be replaced.

If you can get the exact codes,I may be able to give you a more precise answer.Let me know if you need more assistance.Thank you, Scott

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