Yup, the O2 is ignored at start-up and until the exhaust gases are up to temp. The heated sensor helps speed things up but there is still a delay before it's readings are used by the ecu. It won't cause flooding at start-up.
The airflow and temperature are what effect the mixture the most.
jsbike,
Jan 29, 3:48pm
check your water temp sensor, when mine was unplugged, it made it a total pig to start. if its unplugged it will show on a fault code check.
mechnificent,
Jan 30, 7:27pm
The exhaust leak won't stop it starting.
The rechip is why you can't get codes probably, check with the rechipper what you need to read it.
jsbike,
Jan 30, 7:29pm
my rechipped rb20det ecu thats been chipped for a 25det still gives fault codes. I'll find out what contact to bridge under the dash to make the ecu go into diagnostic mode.
Salv. if you get a code, it needs interpreting. O2 sensor code may not mean you need an O2 sensor. Crank or cam codes may not mean you need those sensors either. They are just a guide and need comparing with the symptoms.
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