Overfuelling 1.4-litre CVH engine - what's the issue?

I have a Mazda with a 1.4i CVH. The problem is over-fueling. Which sensors should be at fault and what engine would be compatible to fit the gear box?

Asked on 30 April 2013 by terryr27

Answered by Alan Ross
Check the HO2S heated oxygen sensor (also called the lambda sensor)
Also check the intake manifold air control solenoid
Then the EVAP (evaporative emission cannister purge valve)
Then the ECT (engine coolant temp sensor)
The the IAT (intake air temp sensor)
Then the throttle valve/ sticking/linkage
Then the IAC (idle air control valve)
Lastly check the ECU

Unfortunately do not have level of information on type of engine to gearbox.
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