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So, I put a bottle of this stuff in the tank today... ...and will see if it makes any difference. I also explored the idea of new injectors... Part no 038 130 073BJ - £975 EACH - even with my special discount, they are still £795 each... 😱 A bit of searching on eBay reveals remanufactured ones, with a two-year unlimited mileage warranty, for £151 delivered (each). These are exchange parts, with a £65 surcharge, returned on receipt of your injectors. Does anyone on the forum have experience of these guys? VEHICLO LTD Marek Jasiok Unit 2, Hinckley Business Centre Brindley Road Hinckley Leicestershire LE10 3BY They seem to have good feedback, although their main business seems to be supplying turbos. I'm going to run a couple of tanks of diesel through the engine, probably adding another bottle of cleaner with the next tankful. I'll then drop over to Darrell and get him to hook it up to his diagnostic gear and data-log the injectors, to see how bad they are. If they are misbehaving, it'll make a good job to do when the weather is crap (October onwards 😆). Cheers, Mike 😎

So, after a bit of a gap, I have some news. It was a fairly muggy but bright day, so I drove the 120-odd miles to my tuner Darrell's place in Northampton with the hood down...😎 Arriving just before 1300, Darrell immediately drove me to the pub and told me to have some lunch and keep myself busy... 😆 Rude not to... Meanwhile, back at the barn, Darrell has managed to remove the old ERG valve... Hmmm - that's not supposed to look like that, is it? Touch of carbon build-up there, Hoskins...🧐 He fits the new EGR valve, then does a deep-clean of the exhaust system and the DPF. He then zeroes all the settings on the remap, and sets the EGR 'duty cycle' to a minimal number - effectively deleting it, but without throwing up error codes. He picks me up at the pub in a couple of hours, and tells me that the car will need an oil service as soon as practicable - I was planning this for Saturday anyway. He also tells me that the air filter is filthy and asks when it was last changed. I did this in July 22 (and, it later transpires, only 2000 miles ago). I have a fresh one in the garage to be fitted this weekend. We go for a test drive and the car is quite hesitant at low throttle settings. Darrell assures me that much of this will be the system getting used to it having a valve that functions, but also mentions that the injectors may need a clean. As I need to refuel anyway, I do so with 'Super Diesel', as it promisees extra detergents etc. Can anyone recommend a good diesel injector cleaner additive? After settling up, I drive home - once again with the roof down - why not? 😎 By the time I get home, much of the low throttle hesitation seems to have gone. After releasing my poor dog into the backyard, I quickly pop the bonnet and remove the air filter... Holy crap! Darrell says the entire EGR flow has clearly been routed through the air filter to cause this... I shall complete the service at the weekend and report back with any updates... Cheers, Mike 🤓

Thanks Steve - I'll post up the progress with the work... 😎

New EGR valve has arrived...

"Adapt the new unit" - could you expand on that please Stevey? 🤔 Thanks, Mike😎

I had a proper remap - from someone a friend of mine has been using for ten years - and I trust his judgement. I would think, at 107k miles, it might be worth fitting an £80 aftermarket EGR, and then - if it doesn't work out - fit a genuine one? 🤔

Thanks, Steve. I can get a genuine EGR from Audi for Around £380 - or an aftermarket one for around £80...🤔 eBay aftermarket link There is a slight lag in acceleration, not as pronounced as an early Saab turbo, but noticeable; but I thought this might be a function of having the chip breathed on (which enhanced the performance significantly). I could probably strip down the EGR and have a look at the turbo's vanes this weekend...

Good afternoon all, I've not been online much, as the convertible has been behaving itself. However, a couple of days ago, it threw a hissy-fit and went into limp mode, with the glow plug light flashing (actually, it went into 'undriveable' mode). As soon as I restarted, it returned to normal. However, a day or so later I had a similar event, so garaged it until I had time to use the OBD11 on it. As expected, it started and idled perfectly, but threw up the following codes: P0403 - Exhaust Gas Recirculation Circuit - Intermittent P0234 - Turbo/Super Charger Overboost Condition - Intermittent A bit of googling suggests that the EGR may be blocked or defective. Can anyone suggest first steps to diagnose what needs cleaning or replacing, please? Many thanks, Mike 😎 PS Car is a 2006 A4 convertible with a BPW 2.0 TDi 140, manual gearbox and about 107k miles.

You didn't specify what product from the link you thought would be the solution to your problem. Also - lighten up, why don't you?🙄

So – it's wet and cold here in Norfolk 😃 - and I have just collected the convertible from Norwich Audi, after having the oil pump drive replaced. Everything looked in good order once the sump was eventually removed (pics from my mate Kev)… The drive was pretty worn… …difficult to show in a pic… …but I am really glad I got it done. I'm content that this should now be good for another 100k miles or so… 😎 Amazing how a small part could cause chaos if it failed…

OK - don't bite my head off - but from your description, this sounds suspiciously like a fuel blockage. Sudden loss of power; stops pulling; blockage clears; revs increase... 🤔

Hi Mohammed, Thanks for the update. OK—seems you are on your own with this as far as Audi are concerned, so you need to work out a fix. If this was my car, I'd put a wire brush on my Dremel or drill, and expose all the metal around the rust spots under the bonnet. This should give you a good look at any underlying problem. Assuming you get down to good metal, with no holes or dents from below, I'd get a rattle can of primer, and another of your car's colour, and just respray the area (which needn't be more than a couple of inches (5cm) in diameter). If you find that the rust has formed from a dent from below, you're going to have to do some further investigating…

Have you tried asking the vendor? If he's selling these regularly, this can't be the first time this question has come up... 🤔

Thinking back, I was having trouble getting the other end of the hose to fit into the turbo (the end with the metal collar and spring clip). My buddy Dave came over to help - I was in the house, and he said, "I could see you were having trouble getting the end of the hose into the turbo - I've done it". I didn't take this to mean he'd tightened the clamp on the other end (which I'd not done, as I was sure I was going to need to remove it again to sort out why it didn't fit into the turbo), but we then got busy doing the fuel filter, oil change etc, and it must have slipped my mind. As you say, an easy fix - and a lesson learned to make sure you've finished all of the work before buttoning it all up. Took the car out with the hood down to have an alfresco breakfast with my mate Darren this morning - how many more weekends will we have nice enough weather to do so?

Well, I eventually got around to looking at the car today (having been away on leave in the USA) - and found the problem straight away. I’d clearly not tightened the jubilee clip holding the hose from the front gallery to the turbo (this was the hose which had the split in it). Popped the hose back on, tightened the jubilee clip 🤦‍♂️ and did a test drive - good as new 😃

I was a policeman for 10 years or so, then an RAF Fighter Controller for 18yrs. I then travelled a bit and have been working for the civil service (currently MoD) for the last 14 years. I'm partially retired and work a two-day week at home. I like to travel, by motorcycle where practicable, and write a daily report when I do & have about 8k regular readers... I've just got back from three weeks riding in Oregon, California and Nevada... Journal

No pictures of the new hat? 🤨🤣😂🤣

Dumb

Louse

Genuine pair of fronts on eBay here for £57 🤔 EDIT - same seller has the rears here for £42.50 Don't know how that compares with dealer prices?

Driving at 70mph this morning, when I get the (all too familiar) sensation of the loss of power, accompanied by the glow-plug light flashing...🤨 It happened about half a mile from home, inbound, so I just stopped when I got there and did a scan with the OBDEleven: Sure enough - it shows an air leak in the intake, plus a turbo under-boost. I put it in the garage and will get around to it when the weather is more amenable. Dammit! 🤨

Was it as warm as it looks? 🥵 This chap seems to be making a statement… 😃

Leave the engine off for 10 minutes, then check the dipstick (by taking it out, wiping it and then dipping it back in and pulling it out to check) - this will tell you what your oil level is.