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#1
15th December 2012, 06:58 AM
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The MIL light is only a possible symptom, its possible to have a duff sensor with no light showing.
The light will only come on once the sensor starts giving readings outside the expected range. A faulty sensor can still give readings within range but the wrong readings which could result in fuelling issues. For example on a cold day, it could tell the ECU that its warmer and the result could be lean running
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Manny 2004 A4 1.8T Sport Cabriolet, 89K Miles Past 2004 D3 A8 3.7 Quattro, Xenon, Bose, Blinds, Solar Sunroof, TV, ACC, phone and almost every option. 168K miles rising slowly with retrofit AMI and DVB-T in place of Analogue 2003 Volvo S60 D5 SE Manual, 197K miles. 2001 D2 A8 3.7 QS, Bi-Xenon, Bose, Blinds, Electric Everything, retrofitted RNS-D, 191K Miles 
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#3
15th December 2012, 09:28 AM
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Thanks mannyo and psyche,
TBH, the vacuum pipe replacement was so "up there" on the list of things to do, that that roll of replacement pipe is actually in the boot!! Hoping for some spare time through the festivities to get a go at it. Many thanks one and all. Best regards, Steve
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#4
30th December 2012, 12:33 PM
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Hi Guys and Gals,
I'm pleased to report the "thump" has now disappeared, after I replaced the small vacuum lines, and removed the PCV through which I cpould hear was an air leak, subnsequent dissembly revealed a diaphragm in two halves, so two questions, does anyone have a spare?? I don't want to go to the stealers, as the valve is £74!!!! Failing that I will be in contact with our sponsors, fine body of men they are!! Later on, I may try a repair to the diaphragm, possibly bonding a condom to the existing halves, as it is an all but circular split. I have seen this repair before on motorcycle CV carb diaphragms. I suppose the moral of the tale is, before you spend big dollars, have a check around using some old fashioned nouse! Best regards to all. Steve
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#5
3rd January 2013, 07:51 PM
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Hi Guys and Gals,
further to this, the intake is now plugged, and I'm awaiting delivery of the new valve. I have done a vagcom scan, and I'm free of DTCs!!!(Hooray!!!) Interestingly, using vagcat online, I obtained the part No for the valve, and asked TPS, this reduced the rate to £54+ VAT, I then googled it, and was astonished to find that AMAZON could supply it, from the USA, at £49 inc VAT and delivery!! Just thought I'd share....! Best Regards to all Steve
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