good point, I'll try that in the morning
good point, I'll try that in the morning
started first time at -2c.... I think I've finally got the hang of it....
don't JSUT wait for the glow-plug light to go off... give it literally a minute or so longer and when the engine first soudns like it takes, just keep the key turned half a second longer....
I do that too, I generally wait until the airbag light goes out. If it's cold I do that twice and it will fire with two turns of the engine.
Thats not normal chaps ! -4 this morning and the glow plugs stay on for 4 sec then it fires straight away - first turn of the engine. I can get a video of me a6 starting (been off for 2 weeks as we dont drive it much) just dont know how to upload it on the forum. Even without leaving the glow plugs on it still starts fine with first turn of the engine. If the battery is in healthy condition and the compression is within spec then it would start without glow plugs...
I'm going to get on and order these and have a go myself.
My symptoms are:
Anyone any thoughts on this?
- Cold starting is sluggish, but if I give the glowplugs three goes it will fire with about three turns.
- Hot starting is fine.
- If I start the car and drive it for about a minute - say round to the front of the house to wash it - when I go to restart it after a short while 45 mins or so - then even with three heats it will turn over for a good 5-10 secs before firing. As a result lots of unburnt fuel will come as smoke out of the exhausts.
I'm going to do the glowplugs first, as long as I don't shear them off they are cheap enough - then if it's still no better I will have to investigate further and get it scanned.
I've been told that when glowplugs are knackered the light will flash - I've never had that, has anyone else experienced it?
Well I fitted mine today, and can say that it was pretty straightforward and gave me no problems. Four of them are easily accesible, on the rear O/S one I had to take the turbo pipe off (2 jubilee clips) and the front N/S was a fiddle but I managed it ok with a knuckle join on the socket set.
I used a 1/2" drive socket set, which was fine, but it would have been easier with a 3.8 drive set, you will need a 10mm deep socket and the flexible knuckle as I mentioned. If you don't have one then I think you could still get to the front N/S plug by removing the pipe between the intercooler and intake manifold. That involves about 6 nuts and 2 allen keys from memory.
I gave mine a squirt of WD40 when I started, and was just gentle with the ratchet when I undid them, but they all came out no problems. Fingers crossed for the morning ..... :thumbsup:
It's a pretty straightforward DIY job in my opinion, and not worth the two hours a garage would probably charge you.
Well done James...you obviously have a deft touch, fancy a trip up to the midlands to do mine? or I could pop in next time I'm down in Christchurch visiting my sister?? Just let me know whats easier for you......... :laugh:
Fingers crossed she'll fire up first time in the morning, keep us posted :icon_thumright:
If you're down this way mate I would be more than happy to give you a hand ;)
Hmmmmm - not really any better :(
It was about 6 deg here when I started it, the glowplug light went out virtually immediately and the car fired after a couple of turns but still spluttered for a second before running sweetly.
The biggest problem is this, if I start the car and run it for about one minute (ie to drive it around to the front of the house to wash it) - when I come to restart it after say 40 mins or so, it will wind for a good 10 secs or so before firing, when it catches it kicks out quite a lot of unburnt fuel from the exhausts - so in my mind it can only be one of a few things now:
Any ideas and experiences gratefully recieved.
- Battery - this is a possible as it's never been replaced in the three years I've had the car, I will get it tested.
- Fuel pump timing - was set about one year ago with the replacement engine - need vagcom to check.
- Low compression - lets hope not ......
- Intake manifold flap - research reveals they can fail - needs vagcom again.
- Thinking aloud here - the glowplugs only work when the engine is cold, so there must be a sensor which measures engine (water) temperature? If this were faulty then the glowplugs might think the engine is warm when it isn't so aren't heating?
Sorry to hear that James, was hoping it would sort it for you....
Once mine has started it's fine and will fire up first time all day? It takes longer to start if its been left for a couple of days which makes me think it might be leak off pipes or pump timing but saying that it started first time today (at +5c) even though it had been standing since Wednesday evening? I have vag-com'd it and there are no faults showing but I still haven't had the pump timing checked, next on the list of things to do. Not looking forward to the return of the cold weather next week.....
hmmm sounds to me like you are getting a very small ammount of air entering the fuel system, thats why over time it is taking a while for the fuel to pick back up.
There was a small split in two of the return pipes from the injectors: this allowed the fuel to run back and meant that after it had been stopped for a while it needed to crank new fuel up to the injectors.
I'll have to wait till tomorrow to know for sure, so fingers crossed!
Glad you got it sorted! Big job to sort out? Also does that mean you'll be better on fuel now?
Hmmmph maybe spoke too soon :(
It coughed a bit this morning from cold, but still took about ten seconds to fire after work this evening..... Will give it a few days and have a rethink, Vagcom didn't show up any errors codes though.
Oh man.... :(
Pump timing next then James....lets hope its that, don't want to mention the comp------n word in full.....:(
I forgot to ask if they checked the pump timing yesterday. I'm really hoping it's not compression..... although on the plus side, the engine is still under guarantee from the place I bought it from I think, reluctant as I am to ever go near there again......
Its going really well, so I'm hoping there's not 'that' much wrong!
I'm a newbie here and joined this site to see if anyone had the same problem as me and looks like there are. I have EXACTLY the same issue with my 2004 2.5tdi Allroad. I bought it as a "Approved Audi" from a main dealer at the end of December and its been back to the garage at least 6 times since with the starting fault. They have changed everything and the problem (car still at garage tonight) has been referred to Audi Technical in Germany as they are at a loss why the car is sluggish and fails to start first time from cold. Starts fine second time or if you over crank for about 1/2 second but they admit there is something not right but all the diagnostics point to NO FAULT. Its beginning to really bug me and I'm worried they are going to say there is no more they can do. There MUST be something at fault here, I have a 20 year old Mazda which starts first click every morning warm or cold!!!!
Let me know if you get anywhere with yours.
Your issues are a bit different to mine. Mine seems to start ok(ish) in the mornings - it's later in the day that it's not so good. I parked it at work this morning, and just over ten hours later went to start it and it wound for ages before firing, and chucked out loads of smoke.
Why is starting later in the day different to the mornings? I don't know.
Will be back to the garage next week.
Any luck Mark?
soz james, 4 inches of snow put paid to it...got snowmen to build lol
Is that because the car wouldn't start? lol...
Car has been back in again today and they're keeping it overnight to check the cold start in the morning. Over the last few days my ECON light has come on in the aircon too :(
Vagcom checked again and nothing at all, so hopefully the system just needs a recharge. I had it done less that two years ago but I've had a few engines since then ..... I'm hoping that no fault codes will rule out glowplug errors, intake manifold flaps etc etc. Fuel pump timing was within parameters too.
The only thing they could find slightly suspect was the battery. Leaving the lights on for half an hour and trying to start it really pulled the battery down, more than it should have done apparently. So here goes with a new battery.....
Hope you sort it lads. Mine takes abit to start but I'm just living with it at the mo. I'll sort it over the year I'm sure lol.
Econ will probably just be low gas. Who charged it last time? If it was Kwik fit, apparnetly they put in a small amount.
Thankyou for a very comprehensive reply.
The engine was replaced with a recon one this time last year, so fingers crossed cam wear won't be the problem. VP44 errors are a definite possibility I've been keeping my fingers crossed it isn't!
With the new battery the car started well this morning apparently, so when I get it back I will see how I get on with it over the next few days.
I only ever use genuine filters, but swapping the fuel filter may be worth a go. Pump timing is fine, that's been checked. Fuel pressure is ok, except when the battery pulls itself down, hence trying a new battery to prove/disprove that.
No other errors came up, but if still no joy I will try a new CTS anyway, although the glowplug system has all been checked for voltage etc and seems to be ok.
The only other thing to be suggested is the flap in the inlet manifold, apparently a scan may not pick this up either. I'll liase with the garage when I get the car, and report back later.
By "leak off injector pipes" do you mean the return pipes off each injector? If so, as I said below they were checked last week and two replaced then.
Sorry James, I'm beginning to wish I hadn't started this thread :ermm: I ahven't changed a thing on mine yet and I think you're running out of things to change! :(
Was it any better with the new battery? Trouble is you're not going to know for definate until it gets colder again (been pretty warm here last few days)
Yeh I've only had it back a day, so not really done enough starts to judge. It certainly winds over much quicker with the new battery!
little update on my situation;
I'm still having problems cold starting even when its above 5 degrees, lot of smoke out the back when it does turn over (unburnt fuel).
Noticed the other day that the temperature guage doesn't really move, even on a long motorway journey. I presume this means that the engine temp sensor (or is it coolant temp sensor?) is knackered.
Is this difficult to replace? would this be causing the cold start problems as well?
Any advice gratefully recieved.
Start by replacing the coolant temp. sensor, its about £35 at the dealer. If that does not sort it, then you are looking for a new thermostat wich is a cambelt off job !
Is it an easy job? and where is the sensor located?