right could you please help, my mates corsa c14se 1.4 8v 82bhp is running rich. Pulled out the plugs and cleaned em, set the correct gap and refitted. The air filter was a bit grubby but thats being changed 2moro. The thermostat kicks in at 82 and fan kicks in at 100 as the haynes manual suggests. The dash displays the correct temp as the fan comes in when it hits 100. Does this mean the coolant temp sender is ok?
I told him to reset the ecu as hes been playing with induction kits recently and i thought maybe that would feck things up and a reset with the std airbox on would cure things?
What could be causing the over fuelling? Please post as many ideas as possible
THe correct dash display only means the gauge coolant temp sensor is ok. Don't forget, there's another sensor for the ECU and this could be giving a false signal, fooling the ECU to make the engine run rich.
No, there's no way of altering the fuel mixture. It's totally ECU governed. The paperclip idea is a good one but the coolant temp sensor can easily go t*ts up without storing a fault code.
I think it's TECH2 they use these days. You can easily read the fault codes yourself, but you'll probably find there are none!
Your not likely to get an error code as most of the sensors on this engine are resistance based - as long as the ECU gets some sort of reading it is happy, they have to go widely off the ECU map scale before a fault is reported or be disconnected.
I'd change the ECU temp sensor, then if its no better then the culprit is likely to be the lambda sensor (just for a change eg? )