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o2 sensor or thermostat

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Old 03-17-2003, 12:22 PM
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Default o2 sensor or thermostat

which is most likely to cause a signifigant drop in fuel economy?
a faulty thermo or a fouled o2 sensor?

TIA!!
Old 03-17-2003, 12:25 PM
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Default Re: o2 sensor or thermostat (4doormadman)

o2.
Old 03-17-2003, 12:40 PM
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Default Re: o2 sensor or thermostat (4doormadman)

thermostat shouldnt have anything to do with ur fuel...
Old 03-17-2003, 02:11 PM
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Default Re: o2 sensor or thermostat (kyle h.)

couldn't a broken thermo (stuck open) constantly be cooling the block and inhibiting the engine's ability to reach normal operating temps?
(thus putting the ecu into a loop?) correct me if i'm wrong
Old 03-17-2003, 02:24 PM
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Default Re: o2 sensor or thermostat (4doormadman)

It could, but if your engine is staying dead cold then i would hope you would be educated enough to replace the thermostat.
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