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For the last six months plus, while driving at any speed or any gear, random power losses/misfires for one or two seconds, with no pattern sometimes it does not do it for days and sometimes does it three times in a fourteen mile journey, with rev counter dropping and returning to normal again. Sometimes when accelerating from a stand still at a traffic light when I move off, the car seems to do what I can only describe as a huge misfire, I feel a large thud from the engine and the vehicle jerks forward violently then acts normal again so I can drive. Vehicle has had a minor Audi service March 2017b (also full Audi service history). 29thApril I fitted a brand new original Audi original part fuel filter. It seemed to improve things but.... I still see the random power loss/miss fires stutter. Straight after fuel filter change vehicle put on a computer, codes came up P0087 and P1093. (Re computer codes picture attached)Reference code P0087 I googled results; https://www.obd-codes.com/p0087Potential causes of a P0087 trouble code may include: Weak fuel pump, clogged filter or screen, restricted fuel supply line Faulty fuel pump driver module Faulty fuel pressure sensor.Reference code P1093; http://wiki.ross-tech.com/wiki/index.php/17501/P1093/004243P1093 - Bank 1; Fuel Measuring System 2: MalfunctionPossible SymptomsPower LossMisfire(s)StallingPossible CausesFuel Pressure insufficient/exceed/fluctuatingFuel Pump (High Pressure System) faultyFuel Pressure Regulator Valve (N276) faultyPossible SolutionsCheck Fuel Pressure (on FSI engines High and Low Fuel Pressure System)Check Fuel Pump (High Pressure System)Check Fuel Pressure Regulator Valve (N276)Check Fuel Filter and Filter in Fuel Pump CasingSpecial NotesWhen found in 2.0l TFSI<http://wiki.ross-tech.com/wiki/index.php/2.0l_TFSI_(AXX/BGB/BPJ/BPY/BWA)>: * Check Fuel Pressure<http://wiki.ross-tech.com/wiki/index.php/2.0l_TFSI_(AXX/BGB/BPJ/BPY/BWA)#Checking_Fuel_Pressure> * Check TSB/TPI 2008753 (Rest of World), incompatibility between Fuel Pressure Regulator Valve (N276) and ECU software. * When found in conjunction with Misfires and Lean fault codes, check RVUTB: 01-09-03 or 2018919 (NAR only) 2.0T (BPY), for updated Crankcase Breather Valve * If the breather valve is faulty, full engine vacuum is typically found when removing the oil cap at idleMaybe possibly need a new breather valve, high pressure fuel pump/cam follower, or fuel pressure sensor. I've booked my vehicle to go to Audi specialist Les Paul's for first time and I hope they can fix issue as quick as possible.

Hi All, I have recently changed all fuel lines on my wifes 80 cabriolet. Once the car was running again everything seemed good, however once the engine was turned off the breather allows fuel into the charcoal filter, this then drips from the overflow below the car, all be it only sporadically. I have since found another post which gave guidance on how to test the solenoid which controls the flow of vapour through the breather. Having now checked this it would appear that the solenoid is defunct. My main concern is should there be fuel in this pipe at all? It would also appear that I have a few options; could I simply cap off this breather and ignore it? do I change the solenoid as the only ones available are second hand or could I opt for a purge valve from a newer audi/VW as I could get a new one for about £10-15 I hope someone has some answers or could even can cast some light on this. Also has anyone have any of the rubber separators which hold the fuel lines in the sprung stainless steel clips. I removed mine when changing the fuel lines and put them in a safe place. I need about 8 I think. Cheers Simon