Failure In Emission Test

[mazdaspeed]

Yes the Recons  don't have this issue

Yes replaced with a brand new one - no point of going recon as the price difference is not much.

Some how though I passed the test, the engine idle value of Co is relatively high. Hence need to see what the issue is it effect the burn of fuel.  Will check on the voltage of the MAF also as you have said.

Thanks for the input

[mazdaspeed]

Just came across this info as well. 

I've also replaced the throttle sensor but currently running without the Thermostat; hence could be giving a wrong reading.  

 

Defective Manifold Absolute Pressure (MAP) Sensor - The MAP sensor determines the level of vacuum created during an engine's intake stroke, and sends this information to the ECU. During low vacuum the MAP sensor assumes the engine's throttle is in some degree open, meaning you've stepped on the pedal. It relays this information to the ECU. The ECU, in turn, sends commands to the fuel injectors, or carburetor, to increase fuel delivery. A defective MAP sensor will not report the correct information to the ECU, thus disturbing air/fuel ratio. Usually when the ECU senses a defective MAP sensor it will learn to ignore its data, and rely on preset values, and other sensors such as the Throttle Position Sensor (TPS), and Engine Coolant Temperature (ECT) Sensor; Fuel delivery will not be as accurate and high CO may result.   Defective Engine Coolant Temperature (ECT) Sensor - Low engine temperature requires more fuel. When the ECU is unable to determine what the engine's accurate temperature is, it will not adjust fuel delivery properly; resulting in high CO. As explained above, the Engine Control Computer prefers to send more fuel rather then less to avoid a lean fuel mixture.