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Depends on why it is noisy.

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โˆ™ 2012-02-17 16:01:25
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Q: What happens if you don't fix noisy catalytic converter on 2005 mercury grand marquis?
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99 mercury marquis bank 2 o2 sensors?

Bank 2 is the drivers side of the engine on your 1999 Mercury Marquis Sensor 1 is before the catalytic converter ( upstream ) Sensor 2 is after the catalytic converter ( downstream )


Could a 1998 mercury grand marquis be driven without a catalytic converter?

You can but the check engine light will remain on and it won't pass an emissions test.


Where is bank 1 sensor2 on a 98 grand marquis?

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Where is bank 1 sensor 2 on a 1996 Mercury Grand Marquis?

On a 1996 Mercury Grand Marquis , 4.6 liter V8 engine : Bank 1 is the passenger side of the engine Sensor 2 would be AFTER the exhaust has passed through the catalytic converter


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On a 1997 Mercury Grand Marquis : Bank 2 is the drivers side of the engine and ------------------------------------------------------------------------------------------ Sensor 1 would be close to the engine before the exhaust enters the catalytic converter Sensor 2 would be AFTER the exhaust has passed through the catalytic converter ( also called a catalyst monitor )


How much to replace the catalytic converter on a mercury grand marquis?

Just had my 2004 grand marquis convertor replaced (making an aweful noise). it cost me $250 for the part and then labor etc. total of bill for installing etc was $472.61.


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