TOR4x4 Posted January 23, 2009 Share Posted January 23, 2009 I'm fitting a new, well to me anyway, V8 on hotwire and there are these 2 plugs, are they for lambda, and if they are what will happen if i don fit lambda sensors. I have changed the tune resistor from cat to non cat, and won't be running cats. If that makes a difference. Thanks Adrian Quote Link to comment Share on other sites More sharing options...
TanK32 Posted February 1, 2009 Share Posted February 1, 2009 Don't know about the plug but, yes it's best to use the lambda sensors as they monitor the amount of oxygen left in the exhaust. The hotwire air mass sensor measures the amount of air coming into the engine, the ECU then calculates the appropriate amount of fuel to be injected, the lambda sensor then checks the exhaust gas to ensure that this is correct and feeds this information back to the ECU so that small adjustments are made. If the Lambda sensors are not fitted then the circuit is an open-loop system (no feed back) with lambda sensors it is a closed-loop system (feedback). Quote Link to comment Share on other sites More sharing options...
TOR4x4 Posted February 1, 2009 Author Share Posted February 1, 2009 Cheers for the reply, I'm not too concerned about the efficincy of the closed loop system as long as the ecu dosn't go into limp mode or similar, do yo uknow if it will be ok with out the lambda sensors. Adrian p.s. it's on a competition car Quote Link to comment Share on other sites More sharing options...
Hybrid_From_Hell Posted February 1, 2009 Share Posted February 1, 2009 From memory changing the tune resistor as you have sorts out the ECU signals and in effect it will now run as a 'Non CAT' EFI Nige Quote Link to comment Share on other sites More sharing options...
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