I seem to be having a problem with my cav turbo. The engines been running well for a while now, but over the last couple of days it's started to idle high at about 1500rpm. It also seems to be running very heavy on fuel. Having said all that, it's also started going like a train, noticeably quicker than before. Has anyone got any thoughts on what might be causing this?
Where is the idle control valve located? I've never done anything with it, so I don't even know where it is or what it looks like.
Should mention that I tried an ecu reset and it's made no difference. There were no fault codes other than 116 (over boost) stored, and I've rectified that problem.
Where is the coolant temperature sensor located, and is there any way of testing it?
Right, I've cleaned and tested the CTS and all seems fine there, but it hasn't solved the problem. Fuel economy is going through the floor now, about 18 - 19 MPG!! It was running a comfortable 26+ only last week. It's becoming a real problem, I can't afford to be spending 20 quid a night on petrol. HELP!!!
JamesR
was having a similar problem, he changed the lambda sensor, which cost about £25... that fixed it.
you could try that, but be carefull as you could change lots of sensors and you may not cure it. so it could turn out expensive...
Yep have a look on cavweb for testing you lamda sensor.
Get a meter on two of the three wires on the plug on the bulkhead and get a reading.
lean 0.3 - 0.9 rich
Mine was running 0.26 and i was getting 16mpg on the trip taking it very easy.
I got a universal one from halfords for £25 and it paid for itself with the fuel saving in the first week.
It lists a extension wire so it reaches from the downpipe to the bulkhead but you will find it is still too short ( so dont buy it) so use your original lamda loom and patch it into the new sensor so it joins at the bulkhead
Sorted. Tested lambda sensor and was getting 0.13 volts when warm. Changed for a universal one from Halfords (£25) and all seems fine, getting 28MPG again. Thanks to everyone for their help.:beer:
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