my daily runner is a 1.8 escort si and it seems to be using more fuel than it used to, i get about 200 miles out of £50 also it smells like its overfueling, it idles fine and i have cleaned the iscv, maf sensor and its got new plugs and leads... anybody have any ideas ? or does this miles per gallon seem right?

 

lambda sensor



steve

 

aye could be mate never thought of that, are they expensive? dont suppose you have any lying round? hows things anyhoo mate?

 

Assuming it isn't mechanical, it's also worth looking at the CTS, it's job is to tell the ECU the temperature of the coolant, these can go out of range over time and so tell the ECU duff info, so if it's saying it's colder than what it is, it will deliver more fuel.

Martin

 

Ok pal, I never realised that happened what sensor is it?

 

CTS (Coolant Temperature Sensor) this is one of most important inputs to the ECU.

Martin

 

Sorry I know what it is just not were tonlook for the sensor, can it be cleaned or would it need replacing?

 

replace it, they cost peanuts anyway.

 

It will be in a water jacket, so in the side of the head for example.

Martin

 

Ok mate thanks

 

It should be the grey one on top of the thermostat housing on the 1.8Si