techbod

yep^^ im also a qualified tech old school and now retired but I cant help giving help :o I've always been a Citroen fan and had many and had many problems and I love it because you only learn from problems its a case of "been there seen it and sorted it"

fan not cutting in by the sound of it and this will cause the cylinder head to go if not fixed make sure the problem is solved or walk away problems could be a fuse/relay/ coolant temp sensor/sticking thermostat/air in coolant system and in that case there would be no heat from the interior blower

seen it many times and nothing to worry about because the coolant/antifreeze can cause that ( it has a lubricant in it ) and if it hasn't been changed in the last 2 years then that's what happen the coolant breaks down and doesn't do its job, an oil leak into the coolant system would show up in the oil cap and it would be like mayonnaise ot thick coffee

engine and tranny have different ECUs at least the older ones do so it wont be an issue

suspension bushes/shock absorbers/link rods arms that sort of thing- nothing to do with breaks :o just a quick edit* I find this site very useful to introduce people to what to look for http://images.google.co.uk/imgres?imgurl=h...l%3Den%26sa%3DN

the fault could be wiring - IAT or ECM, since you changed the IAT that rules that out so wiring and ECM ( don't know why your not getting any fault codes for the o2 sensors though ) basically how they work in line is the rear sensor matches the first sensor and the resistance becomes equal and it throws a code and sends the ECM into rich mode ( carbon build up on the rear o2 sensor is enough to cause that ) try cleaning it and see if the code goes off, another way round it is to fit an anti Fowler plug which takes the rear o2 sensor out of range so make it hard for the system to read and a little cheat to lengthen their life, an anti fowler plug is an extention which screws into the o2 sensor port and the o2 sensor screws into it

spray the rubber bushings with silicon/wd40 to lubricate them and see if that helps

never really done any work on the C3 and don't have much data on it but I would say check all the fuses, one more thing to check is the coolant temp sensor located the thermostat housing ( you will need a multi meter to test it ) ie: the hotter the car the lower the resistance around 250 ohms ish and the colder it is would be around 3000 ohms, if its high ohms when hot the sensor is bad and the fan wont cut in

P1110 ?? sure its not P0110 idle air temp sensor ( IAT) sensor that would throw emissions out for the MOT

I believe halfords do the surround but not sure about the cable adaptor ( most people just fit the radio and do way with the steering wheel buttons ) but if you have a display then its nice to see it work, you could try the dealer or an audio fitters place "dont let them fit it unless your prepared to pay a lot" even halfords charge too much to fit a radio

75K for the timing belt change ( 60k if driving hard ) classed as adverse conditions radio MP3 holds more than a CD player but most are going down the iPOD road and not cheap you might have to add a new surround for the new radio and if you have steering wheel buttons you will need special leads to keep them working

unless you know someone with the diagnostic gear, I have the ELIT upgraded in 2000 and has the 16 pin and the older 30 pin type and works great on my 2000 xantia it should work with all Citroen's up to 2002 im told but never tried to read the ECU on later 2002 cars and I think thats where lexia 3 takes over only thing with that tool is price :(

this sounds like the little fan and is just above the radio and has the led on the front for the alarm system, the fan is linked to the AC and measures the air volume and temps inside the car take care when removing it because it in tight ( if you can remove the clock you can get at it easier ) the sound is from the fan touching the wires to the LED so it just needs to be clear of the wires and the noise should go