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		Toyota Nation Forum : Toyota Car and Truck Forums > Toyota Passenger and Sports Car Forums > Corolla Forum > 8th Generation (1998-2002)
My emission test showed my CO% WAYYY TOOO HIGH

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8th Generation (1998-2002) Specific discussion of the 8th generation

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11-30-2009, 06:21 AM	#1 (permalink)
azncapcom Official TN Member Join Date: Nov 2009 Location: GTA Posts: 153 Gameroom cash: $34200 Thanks: 0 Thanked 1 Time in 1 Post iTrader Score: 0 reviews	My emission test showed my CO% WAYYY TOOO HIGH The limit for CO to pass is 40. My reading was 79... everything else passed fine... wat might be wrong?

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11-30-2009, 06:43 AM	#2 (permalink)
Fixer New TN User Join Date: Nov 2009 Location: Ontario Posts: 4 Gameroom cash: $2500 Thanks: 0 Thanked 0 Times in 0 Posts iTrader Score: 0 reviews	My understanding is that if your CO is high you have a rich fuel mixture.

12-01-2009, 12:01 AM	#3 (permalink)
azncapcom Official TN Member Join Date: Nov 2009 Location: GTA Posts: 153 Gameroom cash: $34200 Thanks: 0 Thanked 1 Time in 1 Post iTrader Score: 0 reviews	So what would be the problem causing this? a faulty o2 sensor?

12-01-2009, 06:14 AM	#4 (permalink)
Fixer New TN User Join Date: Nov 2009 Location: Ontario Posts: 4 Gameroom cash: $2500 Thanks: 0 Thanked 0 Times in 0 Posts iTrader Score: 0 reviews	Could be anything related to the fuel delivery system - Excessive fuel pressure at the injectors or leaking injectors, the EVAP system, plugged PCV valve to false inputs to the ECM, vaccum lines leaking.

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