Stalls when warmed up

1997 MERCURY VILLAGER
169,000 MILES
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ROBERTJACKSON
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replaced catalytic converter and front oxygen sensor. replaced rear oxygen sensor and it would not idle. put old sensor back on and it idles and dies when warmed up.
Aug 10, 2012 at 9:27 PM
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KHLOW2008
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Is the MIL indicating and did you check for trouble codes?
Aug 10, 2012 at 9:44 PM
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ROBERTJACKSON
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Yes check engine light is on and the auto parts store said there were 2 codes (which he did not give me the numbers) which showed to be oxygen sensor and vacuum leak.
Aug 10, 2012 at 9:58 PM
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KHLOW2008
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Vacuum leak would cause stalling and O2 sensor codes. I need to know the exact codes.
Aug 10, 2012 at 10:29 PM