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Discussion Starter · #1 ·
Hi, first time post as I’ve not long found this forum and not long had my Q5, 61 plate 70k miles and only really bought it for towing our caravan.

But now I’m currently sat waiting for the AA, after giving it a little bit of a tickle to get round a tractor, nice big puff of smoke from the rear then coil light and no power. Any ideas of what it could be ?

Thanks 👍
 

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Q5 55 tfsi e Competition, all boxes ticked, Navarra Blue
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With the engine off can you smell anything? If you turn the ignition on but not start the car do the dash lights go on then all the correct ones go off?
 

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Discussion Starter · #4 ·
Thanks for the welcome. No smells from the engine bay. The lights come on and go off as they should but won’t start.

So, AA have got me home, not much use as to what it could be, his scanner wouldn’t connect to the car apparently. He got it started with easy start spray? The engine itself was having a right good rattle around once it started and it soon cut out again.

plugged it into my obdeleven reader at home and it comes up with fuel rail / system pressure too low - fault code p008700

any help is appreciated 👍
 

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Q5 55 tfsi e Competition, all boxes ticked, Navarra Blue
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From your info it sounds like it could be a fuel pump or filter issue. I would have an indie check it over to check that there is no engine damage.
 

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Discussion Starter · #6 ·
Thanks for the help, at least I’ve got a starting point now as the AA didn’t seem much use to be honest. Will be getting it booked into garage asap to get it checked over.
 

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Discussion Starter · #7 ·
After having the AA out again on the driveway to try and get a better diagnosis. He pulled up the same code as I’d earlier posted.

The in tank pump works, he’s leaning towards pump, injectors or fuel rail sensors. But these can’t be tested at roadside to get a half decent answer of what would be needed?
 

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Discussion Starter · #8 ·
Just thought I’d update this as the car is now sat in the garage and I’m stuck with an expensive repair bill.

Nobody in my local area would touch the car other than 2 VAG group specialists or Audi, I’ve gone with a vag specialist rather than re mortgaging and going with Audi.

So no rough running building up to it, car has only done 72k miles and has full service history, most done by Audi. I put my foot down to overtake on single lanes, drove the car harder than I probably should have and had a big puff of smoke, and car died and wouldn’t fire again.

Now I need a hpfp 4 new injectors, fuel tank, rail, and all lines flushing through, new in tank pump, filter and whilst it’s in, timing belt and water pump coming in at a total of around £3k and now I’m left wonder why on earth I ever bought a Q5 😂. On the plus I’m hoping after all this there can’t be much else to go wrong.
 

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Discussion Starter · #13 ·
I’m assuming so, I’ve only had it a couple of months and I never use supermarket fuel. Bought it off an older couple who owned it from new so my guess would be 70k miles of supermarket fuel from them.
But hey ho once it’s repaired hopefully there’s not a lot else that can go wrong 😂
 

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The older couple probably never revved it properly. So the dirt was probably building up somewhere.
You boot it and it all dislodges all at once.
You are probably right biting the bullet and getting everything done at once.
That way you know it's all done and behind you.
 

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Discussion Starter · #15 ·
@Dowie yeah that’s probably the case I’d assume.

car is now up and running and fueling fine but is now tapping when stopping at a junction ( it wasn’t before it went in)

garage saying possible valve springs . Would this be related at all?
 
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