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@Ben C34yep, that's probably not too far from the truth. A lot don't even make it that far, lol. Although the 3.0TDI engines seem pretty solid. I've had a good run with the one in our Q7.

 

Agree, filled for life is the biggest joke going around. To Audi, life = warranty period. 3 years. 

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On 26/02/2023 at 6:18 PM, Dose Pipe Sutututu said:

You're the Audi, Mini god now.

I wouldn't mind a SQ5 myself, great experiences in them (thrashed rentals).

They are awesome to drive. I would have loved to get a 2017 on. Much more current tech and choice of TT petrol engine. Unfortunately I ain't that baller. They're way out of my price range or the $ I'm willing to sacrifice if it all goes pear shaped.

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Free tickets, yeah and I'm Santa Claus.

I've nearly covered 5000km since buying the SQ5. All was going well until last week, when it failed to start after sitting at a red light. Had to put it in park and then it fired up normally. On the drive home, I noticed the idle was a bit funny a couple of times and a slight hesitation at light acceleration in high gears. Hmm.

Once home, I hooked up the VCDS and it told the story. Injector 4 has deteriorated significantly and is now way out of spec. The injector deviation had gone from -1 to around 6. There is a constant misfire now at idle.

I knew this was coming but didn't expect such a rapid deterioration. Luckily it didn't get stuck open and fill the sump with Diesel which can happen. 

I had been scouring the net looking for replacement injectors, replacement Bosch which is the same as OEM Audi without the Audi logo and different part number are around $700 each. Genuine Audi from the stealership are nearly double that.

I happened to come across a genuine Audi one being auctioned on eBay. I asked the seller a couple of questions, he was a little cagey, says he bought a few injectors as spares but didn't end up using this one as he sold the car.  I considered the fact it could be a fake or dodgy in some way but decided to take the risk knowing I could always get a refund through PayPal if it wasn't legit. Managed to win the auction and got it for $370. It had been sitting in a drawer for the last couple of weeks. I procrastinated fitting it straight away, now I had no choice.

 

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Didn't want to waste time fitting the injector if it was dodgy. To rule that out, it was taken to a diesel injection specialist and properly tested. I also got them to check if it was a legit OEM injector or some crappy refurb unit. On thorough visual inspection and flow testing it was confirmed as a brand new perfectly functioning OEM injector. They also gave me a new copper crush washer seal which they say is better than the Audi one it came with. Has more surface area. I paid them $40 for their time and then headed to the Audi stealer to pick up a new injector stretch bolt and o-ring. $7 for the bolt and $8 for the o-ring. Bit of a rip off with the o ring but I'd rather use the correct part to avoid any possible issues.

I then got to fitting it. Which wasn't too difficult, access was good. Just had to move the coolant overflow out of the way to make room for the sledge hammer puller to extract the injector.

One of these

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Old injector, there wasn't much sealing washer left and you can see the combustion gases had gone up the shaft and eaten away the o-ring. Apparently it's the sealing washer wearing away that creates all the issues and leads to injectors failing. The gasses end up eating away the tip where it goes into the body of the injector. (Apparently)

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New injector

 

 

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This is the crush washer/seal. This is the OEM one, didn't take a pic of the upgraded one. The upgraded one is slightly larger and goes all the way to the edge of the shaft. Don't know why Audi never designed them like that.

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Was pretty straightforward to fit, the hardest part was cleaning the seat and bore hole, that took a while. I used a variety of home made tools for the cleaning and finished it off with a tiny wire wheel.

Injector was fed in to it's home with upgraded sealing washer. I used the sledge puller in reverse and gave it a couple of light taps to get it seated right. The new stretch bolt was torqued to the correct 6nm, yes 6 plus 90°.

New calibration values where then fed into the ecu.

 

 

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Fuel pump prime to bleed rail of air

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Car was now ready to start. Um, first time around, I hadn't actually seated the injector properly and didn't have a small torque wrench. That did not go well, car started but oil or diesel was pissing out. I revisited it the following day with a borrowed torque wrench and revised injector seating procedure and all was well and the injector gods approved.

We now have these injector deviation readings.

 

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All injectors are now looking good. I expect the rail calibration points that show 0.0 to change as the ecu learns over the next couple of weeks. 

Injectors 2 to 6 have all been replaced now. Interestingly 1 and 2 which apparently haven't, look great. I'm wondering if they had possibly been changed in the past prior to the previous owner. I am considering pulling them and replacing the copper seals to the upgraded type to prolong their life. The condition of the old copper seals should give an indication to wether they're the original injectors or not.

 

So this is how you Audi, as seen above that VCDS scanner is a must have if you own an Audi. Actually, for any modern car these days you've got to have your own dealer level diagnostic tool otherwise you get an absolute flogging going to stealerships and euro specialists. I see countless posts of dealer charged me $400 for diagnosis but still couldn't tell me which injector is the issue. Can buy the damn tool for those $ and have change. There is one caveat though, if you're mechanically retarded, stay away from these types of tools as you can also do some serious damage that will then require an extra deep stealership level reaming.

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On 28/02/2023 at 9:46 AM, ActionDan said:

Well done :)

Thanks Dan👍

On 28/02/2023 at 9:48 AM, Dose Pipe Sutututu said:

Nice work!

Good read as well, some lessons there for all prospective VAGgina owners.

So when you opening up your SQ5 tuning shop? lol

I am a peasant and have OBDeleven :)

 

So wen launch control video?

Thanks. Tuning, shop. Never,lol. I just want this thing to be all schmick.

OBDeleven is great, especially for latest gen VAG but I already had VCDS and I refuse to pay subscription fees and this new credits scheme they've got. Did you get yours before that crap started.

Re launch control. I think my engine mounts may have something to say about that 💩

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8 minutes ago, admS15 said:

I refuse to pay subscription fees and this new credits scheme they've got. Did you get yours before that crap started.

I got in before that :) 

I'm assuming you can play around with the Haldex controller too? setting it to grip is good fun, but it makes the car drink a bit more fuel.

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On 28/02/2023 at 10:13 AM, Dose Pipe Sutututu said:

I got in before that :) 

I'm assuming you can play around with the Haldex controller too? setting it to grip is good fun, but it makes the car drink a bit more fuel.

No haldex for SQ5. Quatro all the way baby.

Speaking of fuel. This things been returning around 9l/100 around town, under 7 on the freeway. Worse I've seen is around 10. Pretty damn good power vs fuel economy.

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So we've caught up now and are pretty much up to date. Today, decided to pull the intake pipe and check how much gunk is there and give it a clean.

Clean diesel they said. Um, yeah.

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Clean diesel, my arse.

 

After some mucking around with degreaser, rags and scrapers, we're looking much better. In future, will run a can of intake cleaner at every oil change.

Forgot to take a pic of the intake manifold entry, too much gunk on my hands.

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May have to rig up a catch can to try and reduce some of this shit. An egr delete would fix it, unfortunately it's not that simple.  The dpf won't regenerate with egr turned off, a dpf delete would also be required. I'll cross that bridge only if I need to.

Anyway, CLEAN Diesel. Sure😂

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