My newly aquird Gti 8v has the above system fitted, and its running very rich it seems, ive fitted a new air filter, changed the oil and filter and given it a good thrashing but im still worried about the MOT on monday.
Any ideas how to adjust it?
Thanks
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- Jaba
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Mixture adjustment is done by turning the mixture screw out - anti clockwise. If this is wrongly set then 3 to 5 turns should make a noticable difference. The screw is in the top cover of the flowmeter at the RH end.
If the coolant temperature sensor is faulty then this would keep the mixture too rich for a hot engine. Testing this involves measuring its resistance when hot at the flow meter ECU plug.
Leaking injectors can give funny too rich symptoms too.
If the coolant temperature sensor is faulty then this would keep the mixture too rich for a hot engine. Testing this involves measuring its resistance when hot at the flow meter ECU plug.
Leaking injectors can give funny too rich symptoms too.
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Errrr - not quite Tim
We are talking a VERY different temp sensor here - STRICTLY for the ECU. This sensor tells the ECU which temperature the engine is working at. If this sensor is duff - the ECU gets a wrong message on the engine temp - and accordingly enrichens the mixture. Its the electronic way doing an automatic choke.
The temp gauge on your instrument panel is a completely different beast - with its own separate sender. Nothing to do with the engine control.
We are talking a VERY different temp sensor here - STRICTLY for the ECU. This sensor tells the ECU which temperature the engine is working at. If this sensor is duff - the ECU gets a wrong message on the engine temp - and accordingly enrichens the mixture. Its the electronic way doing an automatic choke.
The temp gauge on your instrument panel is a completely different beast - with its own separate sender. Nothing to do with the engine control.
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- Mike E (uk)
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The temperature sensor for the ECU is a different one from that on the dashboard gauge.
The sensor for the ECU is near the thermostat and has a proper connector, not a push on crimp one that the dash gauge has.
At 20'C it should be: 2280 to 2720 Ohms
At 80'C is should be: 290 to 370 Ohms
The sensor for the ECU is near the thermostat and has a proper connector, not a push on crimp one that the dash gauge has.
At 20'C it should be: 2280 to 2720 Ohms
At 80'C is should be: 290 to 370 Ohms
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- Jaba
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Tim - if it fails on a too high CO reading this indicates a too rich mixture.
Assuming the ECU temp sender is ok the CO can be lowered by turning the screw ccw. 1.5 turns will lower the CO by approx 1%.
The tester may be happy to do this for you as it only takes a couple of minutes.
Assuming the ECU temp sender is ok the CO can be lowered by turning the screw ccw. 1.5 turns will lower the CO by approx 1%.
The tester may be happy to do this for you as it only takes a couple of minutes.
The Joy of BX with just one Citroën BX to my name now. Will I sing Bye Bye to my GTI or will it be Till death us do part.