o2 sensor or thermostat

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Mar 17, 2003 | 12:22 PM

crxmadman

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Joined: Apr 2002

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From: Richmond, B.C., Canada

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!!

Mar 17, 2003 | 12:25 PM

rioninja

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From: Philadelphia, PA

Re: o2 sensor or thermostat (4doormadman)

o2.

Mar 17, 2003 | 12:40 PM

kyle h.

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Joined: Sep 2002

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From: VA

Re: o2 sensor or thermostat (4doormadman)

thermostat shouldnt have anything to do with ur fuel...

Mar 17, 2003 | 02:11 PM

crxmadman

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Joined: Apr 2002

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From: Richmond, B.C., Canada

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

Mar 17, 2003 | 02:24 PM

rioninja

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Joined: Mar 2001

Posts: 3,331

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From: Philadelphia, PA

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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