Coyney

Hi buddy yeah i finally found the issue i after changing everything that could possibly of caused it i started looking more into the kive data and found that it was the sensor before turbo in the exhaust manifold. It was reading 1000 degrees when cold. Put a new one in from Darkside Development and it started back up with no issues. Hope this helps mate. Took me 5 months to fix it.

Once im 100% its fixed im going to do an in depth thread about it and what ive done and what to look for. Ive saw so many people have the same or similar issues so hoping to help them with what ive learnt on this as alot of the symptons i had could result in other mis diagnosed issues.

OBD eleven is what ive been using. Its been to multiple garages and had no joy. Spent a few days going through all the data etc and found that it was reading 1000. Its been a long hard time resolving it but fingers crossed its sorted now. Problem i had was every garage would plug it in see no faults and send me my way. Even very reputable companies couldn't fix it or wasnt interested in spending the time to resolve it. Shame really. I had one so called "Audi Master Technician " tell me it was the head warped, needed all new injectors, cam belt water pump at a cost of 2000! He said these BRD engines are !Removed! and heads fail hence none on the road he had it plugged in for 10 mins and decided this ! Glad i walked away but some unlucky people would pay the price !

Just an update on the issue. It may help anyone in the same situation. Problem resolved after a long 5 months of changing out parts and chasing the fault. It was the temperature sensor before turbo on exhaust manifold. Swapped it out for a darkside development one and fired back to life. Still early days so will test it for a month or two and report back. Again no fault codes showed at all and all.live data seemed ok apart from thatvone sensor started showing 1000degrees when cold. Hope this helps anyone else in need. Thanks for all the advice etc 👍

Anyone in Shropshire area have Vagcom? Or anyone recommend someone who could look at this dam thing ! Im at my wits end ! Checked everything advised and still no joy. If i cant get it running by December it will be scrapped which is a shame as only 130k and i solid motor. Spent 1000's in the last 12months. Every gatage is using generic readers etc ive got obd 11 but om hoping Vag com can find the answers. Im 99% its fuel air mixture. Thanks

Well ive cleaned my old one so will try thay and them get a genuine one if that doesnt work. Ive heard a lot of peoel say the same. I guess electronics is a no go from Euro. Live and learn i guess. If still dubious to it being MAF but its defo with another go. I do think its an air/,fuel mixture problem. Ive git another so called specialist looming at it Monday so will keep you posted

Cheers buddy i did swap the Maf for a euro car parts one but since have been told it may ot be compatible so will clean my lold one up tonight at work and twst it as well as the PCV over the weekend. Tha ks for the help ✌️

Ive changed the egr valve and cleaned the throttle body which is afterwards. The take manifold was full of gunk. Ill check the pcv tomorrow. Is there a way of testing it ? Ive changed the fuel filter but im going to check the fuel pump as well. Im no mechanic but im guessing the ru ning issues could be air/fuel mixture.

Well changed the thermostat and EGT sensor as i found it be glued together ! Happy to report thr DPF regeneration kicked in and seems good but the original issue is still here. Still struggling to start and loss of power u der 1500rpm and struggles getting revs up. Going back to thr drawing board. When i unplug the MAP sensor it starts first go but in limp mode. Ive chnaged the EGR but now thinking about the cooler. Ive topped up coolant a few times maybe 1 litre over a few months. No visible smoke from exhaust though. Only reason i say this is that when i removed the intake manifold it was full.of tar like crud so could this be a sign ? I noticed its build up again after only a few hundred miles since ive cleaned it. The EGR valve which is new was also starting to block up with soot yet this was dry. Any input greatly appreciated.

Well back to square one ! Lasted 1 week! Same symptoms as before, DPF light came on after 1 week and wouldnt clear. Had a specialist look at it and found that thermostat was toast so changed that aswell as exhaust temp sensor as that was reading 1800 degrees. Took it for a drive afterwards and it regened straight away so happy with that but still same issue with lack of power under 1500rpm. Pulling my hair out now and ready to throw the towel in. If anyone knows of someone in the west Midlands who are clued up im all ears!

Brilliant buddy I really appreciate that info 👍 I'll get on that as soon as soon as possible and check it. I've o ly got an OBD eleven reader but should show me the values. When i had the dpf changed they changed the temp sensor as it snapped off and I said to check the others and replace if needed. When it failed they plugged it in again and I asked about FPF pressure sensor and to test it and they said 1% is normal. I took it as truthly as possible as they work on DPF all day every day but now I'll question it. I'm not too clued up on the parameters of the DPF etc so much appreciated. Not going to lie this has drove me insane for 3 months and cost me 1000's so if its just case of a sensor change I'll be annoyed but happy at the same time. 6 garages and so called specialists unable to sort it so fingers crossed this us it. Much appreciated again 🍺

I've changed MAP sensor, MAF , EGR now dpf. Had the dpf pressure sensor tested running 1 psi which was told was fine. What's the EGT sensor related too? I'm currently looking at glowplugs or thermostat possibly 🤔

Any luck with the new cam ? I'm having similar issues on my B7 tdi. Been chasing a fault since July with lack of power under 1500rpm. Found out it was the DPF so had that changed at a great expense. Worked for 1 week and now light is back on and won't regen. Took it up and down the motorway endless times and nothing. Took it back to garage and they checked everything and basically said it needs to regen so carry on driving it as nothing out of the ordinary yet it shouldn't need to regen after a week. All sensors seem In order and no fault codes what so ever ! Something is stopping it do a regen and finding it is a needle in a hay stack ! Audi want mega money just to look at it so if anyone knows anything that could help would be 👍

Thanks for the reply and it's nice to hear a different opinion on the issue. Deep down I've always thought it may be the DPF but the readings were OK from what I've been told by garages etc. I will now be able to monitor the levels at least as I have a measurement to go by. I'm more disappointed in the fact that 5 garages which 1 of them was Audi and 2 specialists that they never even considered the DPF. I just hope other Audi owners will see this and it will help them to find a cure. I'm currently 1250 deep resolving this. The DPF was 270 and labour 355 with new sensor. Can be done on the drive but never had to option to drop the sub frame. I hope this helps people have the confidence to tackle jobs themselves. Alot of Garage's now im my eyes are "fitters" not mechanics or engineers. To get refused work due to rusty bolts on a DPF is a give away that your in the wrong place ! Will keep everyone updated but as of now running better than ever !

Thought I'd drop an update just incase it helps anyone else in the future. Final cause was the DPF. Wasn't showing any fault codes but was blocked solid. New DPF and temp sensor, a good Italian tune up to blow all the !Removed! out of exhaust and it seems good for now. Will keep updating but as far as now its 100% DPF. Current cost is £1250 with a the parts I've fitted so fingers crossed its good for a few years yet. But I've just won a mk2 golf gti with an r32 conversion so if anyone wants a A4 BRD tdi with 130k it may be up for sale soon.

Update on car as it may help others in the same situation. Just took it for a good thrashing with fresh fuel down the motorway. DPF light came on so thought I'd try clear it. Usually goes within 15 minutes at 2500rpm yet this time stayed on for 30 mins at least. Gave it some welly off the slip road and boom started running fine with low rpm now back to how it was. DPF light still on so carried on but can't get it too clear. The car was intermittent going good to bad throughout this (approx 60mins) found when I floored it it would pick up again yet DPF light still wouldn't clear. Got home plugged it in and the readings are as follows in picture. Now I had garage check the DPF and they said it was fine and didn't need a forced regen yet OBD eleven is saying max capacity at 60% yet mine is high 70's. Not too clued up on DPF's but could this be an issue of loss of power and would it be intermittent? Going to get my local DPF cleaner to look at it tomorrow. No other known faults showing so hoping uts a case of a clean or delete and job done. Will keep you posted

Cheers buddy. The fight continues !

It's had a new battery not so long back and I spoke to Audi as its a B7 it doesn't need coding to the car. Only later models apparently. The problem is there is no faults on car, everything I've changed hasn't resolved the issue and its becoming a money pit. The issue only started after a long 4 hour drive on the motorway with cruise control enabled so currently trying to shed some light on that and if it could of affected the throttle position maybe. When yoh unplug boost pressure sensor it revs fine in low rpm so it's throwing me off as it seems to be sensor issue maybe yet its been changed twice aswell as the MAF.

I've checked N75 valve and all Is OK. The injectors are performing as they should and all within tolerance on live data aswell but I will check the harness this week. I've just taken it to a so called expert master technician local to me and first thing he said was all the injectors are toast and most likely need a new head. Looking at 1500 minimum. After watching the live data with him I could see the injectors are all running the same values hence questioning him. He said these engines are prone to head failures hence there is not many on the road anymore ! Now I'm no expert at all but the injectors and harness were replaced by Audi under the recall in 2013 and its only done 50k since (currently on 130k) and I find it hard to believe they can only last 50k and the head to be scrap. Looks like it may have to go to Audi as every so called expert has a different opinion on it. From all the forums and info I've researched I've yet to see any failed heads. It's definitely a fuel related issue as its struggling to start lately. I'm going to drop the fuel and replace filter one more time before it goes in to Audi just incase.

No it wasn't coded I didn't realise it needed to be. I'll ask around and see if anyone local can code it for me. I've also fitted new MAP, MAF and EGR I take it they will need coding aswell ?

Hi cheers. I had new battery 6 months ago and it's been running ok till recently. I'll have it checked again. How do I code it to the car? Is it something I can do? Thanks

It's not the nature of the car . I've had it over 2 years and it's never been like this. You shouldn't have to hold revs at 1500rpm to pull off keep dropping it down to stay above the RPM to stop it cutting out. Maybe yours needed a remap but mine certainly doesn't. I've spoke to Auid technician and they are stumped aswell as it has no codes showing hence doing the cheaper jobs first. If it was always like this then I'd agree with your statement about a remap but clearly something has caused the issue hence trying to resolve it 👌

Update on the A4 and its still the same. Cleared all the faults related to MAF, MAP drove it around this week and they still haven't came back. No faults on the car from 3 different readers. Just took it to a DPF specialist to check that and it's fine. Seems like it's regening ok so didn't want to force one. Boost pressure still looks fine. Everyone seems stumped ! Quick question if anyone can help when replacing MAF and MAP do I need to programme it to car? No options on OBD eleven to do this. Pulling my hair out now. Another fault I did noticed was the SAS sensor (can't remember the code) cleared it and yet still hasn't came back. Was wondering if this could restrict power on low RPM? Also another thing could the cruise control be at fault? Could it also be restricting the power and RPM or ESP? Any tips or advice much appreciated before i start stripping the entire engine out

Update on the A4. Still the same, cleared all the fault codes related to MAF, MAP drove it around this week and they still haven't came back. No faults on the car from 3 different readers. Just took it to a DPF specialist to check that and it's fine. Seems like it's regening ok so didn't want to force one. Boost pressure still looks fine. Everyone seems stumped ! Quick question if anyone can help when replacing MAF and MAP do I need to programme it to car? No options on OBD eleven to do this. Pulling my hair out now. Another fault I did noticed was the SAS sensor (can't remember the code) cleared it and yet still hasn't came back. Was wondering if this could restrict power on low RPM? Also another thing could the cruise control be at fault? Could it also be restricting the power and RPM or ESP? Any tips or advice much appreciated before i start stripping the entire engine out 😂