Stevey Y

No it means you have about 20% left on the linings, beyond that the piston travel is likely to seize out. Steve.

Hi Joe, sounds like the pump is ok as the pump operating for a second after shut down is what its supposed to do to take up any air in the system and if its only running for the same time on start up thats ideal, which brings me back to the rail pressure regulator which is a spring loaded device that is solenoid controlled but it can have a tendency to stick when worn as they are not individually monitored by the ECU they generally throw up a code for rail pressure the clue could be that the car only does it on rough roads, they don't like being rattled around when worn, the reason for the effect not happening when accelerating hard is because it will use a part of the valve stem in the unit that is infrequently used, once the valve is worn they can stick and starve the rail of pressure as it is slow on reacting to the opening pulse. Steve.

Hi I think you need to change the o2 sensor, that may well cure your problem. Steve.

Hi unfortunately Jon is 100% correct, premium brand or not its a fact same as the timing chains fitted to Mercedes/BMW, the design is flawed in so much as if it was running dry exhaust gas it would be fine but if you throw Adblue and the water vapour into the mix it becomes a glutinous white substance that just blocks the cooler tubes this then corrodes the tubes as Adblue when wet and partially solidified is extremely corrosive on base metals. Steve.

Hi if you take out the original lamp the part number is stamped on the back casing, if you are not sure post a picture and someone on here will point you at the right number. Steve.

HI yes any defective sensor will cause problems as it throws the whole system out so most likely yes, if you fit a new unit it will have to be readapted so it works in harmony with the other sensors. Steve.

Hi you would be amazed at what you can do with it, activate dormant functions on your car, check soot and ash levels in the DPF even when the last regeneration was as well as reset the Adblue level if that goes wonky, it will even let you check the amount in the tank and then there is a host of re adaption portals for just about any sensor/valve on the engine. Steve.

Hi you can disable it with VCDS, the system won't work anyway with the aircon on as that would be to much loading trying to start it frequently and drag the compressor round whilst starting. Steve.

The one you are looking at will have some chain lock assembly, the idea is you fill the car with just the right amount of oil and then drop the graded bit down the hole and lock it off at where the oil reaches the top mark, thats full, you can't leave it in as it has no sealing on it, believe me I have the same engine and there is a dipstick for it in the U.S. but if you want to pay £160.00 + £30.00 shipping you are welcome, its cheaper to use the level sensor on the MMI until it goes off its !Removed! like my one did and then just get a new one about £70.00. Steve.

Hi only way to find out whats going on is get the car scanned for faults. STEVE.

Hi same as electric cars no one wants to publish the carbon emissions produced in manufacturing or the fact that dead batteries for the car are virtually non recyclable and extremely toxic, but that won't matter in a world of we only want you to believe implicitly what we tell you, in fact the dark side of production is not good P.R. same as where did the last strain of Covid originate. Steve.

Hi do you know anyone with VCDS/OBD Eleven as either of those would throw up a much more definitive picture of whats going on, problem with these vehicles is that most generic code readers just give you a code which may well be itself generic, in short it covers a section of the engine and multiple sensors. Steve.

Hi Marty sorry to hear its reappeared, might be worth trying another bottle of Cataclean as it obviously did some cleaning and it says on the bottle it might need two goes at it. Steve.

Hi can you publish the code please, this is where VCDS or OBD Eleven score as they give the part number of the offending module, also have you tried a global reset on all windows with the key fob. Steve.

Hi no if you use a proprietary DPF cleaner and when its regenerating just drive until it stops, the DPF cleaner makes the soot particles smaller and burn off at a much lower temperature, I use a bottle a week as I do a ton of town driving say six or seven hundred miles a week, I have been checking the soot/ash loadings after regeneration and its regularly -1.5grams of soot and between 7-8 grams of ash so the cleaner actually works, moral of the story is don't turn it off in the middle of a regeneration. Steve.

Hi Joe you have the earlier mono pump type and yes you should hear the pump every time even for a couple of seconds as it takes up the air space in the fuel line, easiest way is leave over night and then try the ignition on and see what the duration of the pump run is a worn pump will run for some time indicating that the pressure is being lost, but a healthy pump will run for about 5 seconds as its not loosing as much pressure, easy way to check pump flow is ok is disconnect the in feed from the filter hosing and put it in an old litre coke bottle, turn on the ignition and if it fills in record time its not the pump, therefore the only other culprit would be the fuel rail pressure sensor on the inlet side of the rail [screws into the rail end] and this is easy to change just let the pressure in the rail dissipate overnight before you change the unit. Steve.

Hi go to your local Audi stealer I think from memory the clips are about £6.00 each, they are a one hit affair as they normally break when the seat is removed which is a fairly violent operation [lots of cursing]. Steve.

Hi no such thing as a soft regeneration it either does it or not, there is no passive regeneration, suspect your car is not driven very far as the fans come on because it has tried to initiate a regeneration and failed because the engine has been turned off, if you do this often enough this will fill the oil sump with diesel as these are post injection engines, the fans operate all the way through the regeneration process to dissipate the extreme heat caused by the blast furnace temps inside the DPF [extra burning fuel ], in essence give it a bottle of DPF cleaner in the tank and take it for a good run 22mls minimum. Steve.

Hi keep it as is and work it up to near concours condition and just enjoy it and the memories, if you start heavy modification it along with your memories will turn a bit Frankenstein. STEVE.

Hi you would have to get a donor car or loads of parts most of which will probably need reconditioning, then there's the problem of mounting points as well as getting the transfer box aligned properly, cost wise it would be more cost efficient to buy a later Audi which is already a Quattro. Prime example my attempt to turn my MK1 Escort 1100 into a Mexico cost me two girlfriends and cash wise a good deposit on a house. Steve. Steve.

Hi get the car plugged in and scanned for faults that should illuminate the problem. Steve.

Hi if you can get the car towed out it may well free the brakes, the discs will clean up when its driven could be the fuel in it has deteriorated but the only way to make sure is get the car scanned to pick up the fault codes, any mobile diagnostic tech should be able to do that for a modest fee. Steve.

Hi go on LLL carparts and plumb in the VIN that should bring up the correct diagrams and part no for your car. Steve.

Hi most of the time its one of the two lift pumps under the back seat, I don't know which code reader you used but if its VCDS that should tell you which one is misbehaving, yours is classic symptoms of a lift pump degrading the question, is it the main pump or the assisting pump, my guess is the assist pump which is on the n/s rear of the seat pan, you could be lucky and its a corroded connector which is a common problem. Steve.

Hi belt should be every four years or 80k + ancillary drive belt every 30k or two years, gearbox oil every three years or 30k, all the above are whichever time/milage occurs first, aircon every two years with regard to exceptionally hot summers like last year. Steve.