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Hello everyone, Just after some advice. CJCB engine No Faults Crank, No start issue Ling story short, it started but after third attempt to start is just cut out and now no starting at all. Vcds - No fault Crank speed 250-300 rpm Pressure on rail is a bit bouncing. Questions: What should be fuel pressure after fuel filter, ? HPFP ? No shavings in HFPF. Battery OK,

Hi Everyone ! I have bought an Audi A3 8p 2L TDI (170 HP) STOCK 2005 with 120k miles, engine code BMN. After a month of using it with no problems I go a map for 200 HP installed. However, the next morning after the map was installed the car had problems starting, however, it started. After that the car would randomly cut out while town driving or very soon after starting the car. Although if I made it to the motorway I would have no problems. Sometimes when it cuts out it wouldn't start up again until I have waited for around 10-20 mins then it would start with no problem or some times it wouldn't start for a day or two and then it would start after many attempts. To the extent of my testing once I have driven it for about 20 mins it wouldn't cut out as long as I don't turn the car off and let it sit for around half a day. If I let it sit for 1, 2 or even 3 hours it normally would start maybe with a bit of a difficulty and wouldn't cut out. I have been to the mechanic 3 times. First time they said they got an error code saying the common rail is faulty. So they replaced it. no change.... then I had service due, so I got all the filters etc replaced. They noticed there was oil in the fuel pump system, so they changed the fuel filer twice to clean it a little bit.... No change. Then at the third visit they said that the low pressure fuel pump is not working and that the seal around the high pressure fuel pump is bad and that's why there was oil residue in the fuel system. So they fixed that and changed the fuel filter again.... no change. At this point I have spent around 700GBP and nothing has changed. I have read articles with similar problems and in few they refer to relays and the ECU. Does anyone have any ideas where I should start looking ? Or what I should tell the mechanic to look at ? Also, should I maybe find a different mechanic ;P Thank you and any comments would be much appreciated !!!