Hi guys,
I believe I have a pre sense issue on my a4 Avant b9, but having had the car new I wanted to check the start up procedure is right.
The reason I suspect a presense is because of I get close to a vehicle etc at a junction I presume it should kick in and warm me or shudder the steering...
Mileage was 150k when i sold it but had been doing it since 90k in terms of the rough starting. Worse in the winter when cold and fuel thicker, so almost an glow plug issue but replaced those as well with bosch items, and increased the glow period, no change. Still did it without the glow plugs...
Almost everything!
Tandem Pump
Fuel Filter
Injectors ultrasonically cleaned and new seals
New Injector Loom
Cam Shaft and Lobes etc
Didn't do -
New Battery (commonly mentioned but my battery was measured as fine - red herring)
Lift Pump?
Sadly not, I sold the car, but I did just learn to live with it. You could spend £1000's like I did and I still never sorted it. I don't think anyone has ever got to the bottom of it in all honesty!
So, not a great morning, plugged the battery back in, waited 2 secs and glow plug out, no brake warning but still pretty rough running for 5 secs or do, albeit not for quite as long...sigh I dunno :-(
Interesting, so maybe the battery drain is a red herring...
I havn't got a multimeter so my test is purely about seeing is the battery drain is a red herring or not I guess. If I hook it up tomorrow and find it all OK once plugged in then it can't be a drain issue surely?
Unplugged now......plugged in and alarm went off and keys lost remote central locking but I can redo that easily tomorrow.....
So will test and see how we get on...
Hi David - Rich here :)
Radio Key will be the only thing that needs putting back in I think - I've got mine :-) and vag com etc if need be...
I will try the battery thing tonight though...
So Sprinter (whats ya name!) I'm going to unplug the battery negative altogether tonight and leave it off.....then reconnect and try starting in the morning...
Just saw this on a post too -
FYI All the "Brake!" warning is a common fault on the TDI for starting in cold weather and is NOT an indication of a battery that is due to fail!!
I've just been talking to an Audi tech and apparently the higher current required to warm up the glow plugs in cold...
You can see the boot light looking down through the glass....
I'm going to check my hazard switch now.....
Will also check glovebox light now as well.....
In terms of the wire to the alternator from the battery - I see a big think red cable that goes towards the ECU and to the left hand side...
Researching I found this - will check hazard switch, but is it worth pulling the alternator wires and see if this helps starts?
http://forums.tdiclub.com/showthread.php?t=244419
So today, I Put the key in the ignition, waited two secs for the glow plug light to go out and cranked. Brake warning and lumpy. So defo, if I leave the key in for 20-25 secs it's a lot better.
It's like piecing the information together. I think you are on the right track though, battery drain...
Yeah very similar to me then....I've had mine for years now and in summer it's fine, come the cold weather then it starts.
Clearly I've done a lot of work to try and sort but none of it has made any difference. The audi will be parked up more now as just took delivery of a Golf R so will see if...
I'd say if you crack this you'll crack it for a lot of people.
Talking about charge, leaving the ignition on for 25secs or so tends to help more as well with my issue. Did it this morning (granted not as cold as you mention) and it certainly wasn't as lumpy for as long as normal.
I think your...
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