Deleted
Deleted Member
Posts: 0
|
Post by Deleted on Jul 11, 2017 15:38:40 GMT
Car is playing up. Started suddenly, not gradually. It started when the car didn't quite catch and needed a second prod, after which it didn't feel as smooth, seems less urgent and is behaving horribly in high gears, midrange under full throttle. Very hesitant and lumpy, thoroughly unpleasant. It could be mechanical (obviously), but I'm also wondering about fuel as I'd just filled up. It seems happier when I top up (initially), but doesn't take long to get back to where it was. I can't tell if it's getting better or worse, largely because of cunts in Skodas who won't get out of the fucking overtaking lane...
|
|
|
|
Post by Tim on Jul 11, 2017 15:48:03 GMT
Fuel then.
Have you considered the fuel pump - I had something similar sounding in the 530d which was cured by a new fuel pump (although it was noisy anyway which kinda pointed in the right direction).
|
|
Deleted
Deleted Member
Posts: 0
|
Post by Deleted on Jul 11, 2017 15:50:13 GMT
I'm hoping it's fuel. Audi bloody useless - can't even get someone to have a 'chat', you have to go in. Local indy reckons it sounds like a misfire and says maybe plugs/coils. Going in next week.
|
|
|
|
Post by LandieMark on Jul 11, 2017 15:59:11 GMT
Diagnostic check would be the first thing to do. Could be a multitude of things. Coil packs is a good call. Bad fuel is rare these days, but it isn't unheard of. Could also be a failing air flow meter.
|
|
Deleted
Deleted Member
Posts: 0
|
Post by Deleted on Jul 11, 2017 16:17:18 GMT
As it's not starting with the usual alacrity, I think it probably is ignition-related.
|
|
|
|
Post by LandieMark on Jul 11, 2017 16:36:52 GMT
Could also be a temperature sensor - that combined with air meter will determine fuelling so any of those could cause poor starting.
|
|
|
|
Post by Blarno on Jul 12, 2017 7:38:22 GMT
Shame you're not nearer or I could plug my diagnostics dongle in an have a look for pending fault codes.
|
|
|
|
Post by PetrolEd on Jul 12, 2017 8:20:05 GMT
When I've had similar issues its been coil pack as water has got into the unit, have you had a look around the area.
|
|
Deleted
Deleted Member
Posts: 0
|
Post by Deleted on Jul 12, 2017 9:31:42 GMT
Not sure I'd even know what I was looking for/at. I think I'll entrust it to someone who does.
|
|
|
|
Post by racingteatray on Jul 12, 2017 10:01:48 GMT
Could be sludge build-up in the tank that's got disturbed?
Otherwise yes, probably ignition coils.
I assume as a long-term RS4 owner, you get it de-coked regularly.
|
|
|
|
Post by johnc on Jul 12, 2017 10:16:00 GMT
If you get a high load misfire or sluggishness (i.e. under heavier throttle) it is most likely to be a weak spark.
|
|
Deleted
Deleted Member
Posts: 0
|
Post by Deleted on Jul 12, 2017 10:39:50 GMT
OK, thanks. Doesn't seem to have needed it, Jonny. When it was remapped, the guy at DMS suggested you get an engine warning light before any significant effects, and I've always used it 'appropriately' and with V-Power. Maybe I've been lucky, but I doubt this would be to do with that anyway as it's come on so suddenly.
I'm hoping it'll be single plug or coil as it still idles smoothly, albeit not quite perfectly.
|
|
|
|
Post by alf on Jul 12, 2017 11:49:58 GMT
It does sound a lot like some of the coil issues I had with the 330i.... Sometimes one would stop totally (and sometimes come back intermittently) but sometimes one would seem to partially fail, causing some rough running but clearly not taking out the whole cylinder all the time.
|
|
|
|
Post by LandieMark on Jul 12, 2017 13:11:50 GMT
Oh, I remember you had serious issues with those.
|
|
|
|
Post by racingteatray on Jul 13, 2017 12:21:45 GMT
I had a coil pack fail on my S3 - sounded like a sack of spanners.
|
|
|
|
Post by Roadsterstu on Jul 14, 2017 10:02:17 GMT
Although it could be one of several things, I'd suggest a coil pack failing. I have a plug in OBD sensor that will read generic codes. Always useful as a starting point before heading off to a garage. If you want me to pop over?
|
|
|
|
Post by Boxer6 on Jul 14, 2017 10:53:40 GMT
Although it could be one of several things, I'd suggest a coil pack failing. I have a plug in OBD sensor that will read generic codes. Always useful as a starting point before heading off to a garage. If you want me to pop over? I got one of these a few years ago. V-gate model, under £30 at the time and it's been a real Godsend. |
|
Deleted
Deleted Member
Posts: 0
|
Post by Deleted on Aug 8, 2017 16:03:15 GMT
Decoke, replacement for one of the fuel pumps, door lock done. £1,550, so not too much of an alf. Bonus points to Tim.
|
|
|
|
Post by johnc on Aug 8, 2017 16:25:13 GMT
Not exactly cheap but much cheaper than changing it. Glad it's back to full health.
|
|
|
|
Post by LandieMark on Aug 8, 2017 19:10:01 GMT
Ouch, but glad it's running properly again.
|
|
|
|
Post by Andy C on Aug 8, 2017 21:40:54 GMT
Does it feel more lively ?
I read somewhere a coked engine can zap quite a lot of power
|
|
|
|
Post by Big Blue on Aug 9, 2017 7:35:05 GMT
In terms of time owned the cost per annum is reasonable. Whenever I spend a few hundred pounds on the E46 I just reason that a new car is thousands in depreciation.
Glad the beast is back to health.
|
|
|
|
Post by johnc on Aug 9, 2017 7:45:18 GMT
Was it a chemical decoke or an "old fashioned" heads off and clean job.
|
|
Deleted
Deleted Member
Posts: 0
|
Post by Deleted on Aug 9, 2017 8:23:20 GMT
Physical. They use walnut shells, as it doesn't necessitate dismantling the engine too much and even though the valves are closed, if they weren't seating correctly (which mine were, apparently) and there's a small amount of ingress, the engine can burn it harmlessly. I am going to be looking into regular additive treatments though. They take before and after pictures, and they were far worse than I could have imagined before and clean afterwards.
Andy, yes, it does feel perkier, so I suspect it was a little down on power. Didn't get the chance to really wring it's neck because of traffic yesterday. But then after driving Mrs 12th's for three weeks (including two with the dogs as passengers who don't care for any degree of enthusiasm) it was always going to feel 'liberating'.
|
|
Deleted
Deleted Member
Posts: 0
|
Post by Deleted on Nov 27, 2017 16:22:51 GMT
It feels like the second fuel pump is in the early stages of failing - with hindsight there were a few warning signs the last time and they are present and correct. Booked in for the work, though not as soon as I'd like, and not with the indy who was rather less urgent and on the ball than described. I'm wondering whether the remap puts more stress on the pumps, and as they were both nigh on eleven years' old...
With the benefit of hindsight, I should have had them both replaced. Arses.
|
|
|
|
Post by Big Blue on Nov 27, 2017 21:16:33 GMT
Such is life. Every time I see your model of RS4 I advise the driver to keep it forever. They are the sort of iconic car that the youth of tomorrow will lust after in years to come.
|
|
Deleted
Deleted Member
Posts: 0
|
Post by Deleted on Nov 28, 2017 8:59:39 GMT
Such is life indeed, and thank you for those exceptionally kind words.
I suspect that the youth of tomorrow will view a 0-60 time beginning with a 4 as laughably slow if Tesla is anything to go by!
|
|
|
|
Post by Bob Sacamano v2.0 on Nov 28, 2017 9:14:54 GMT
The RS4 will be the RS2000 of the future.
|
|
|
|
Post by Roadsterstu on Nov 28, 2017 12:52:03 GMT
If classic car prices continue as they have been then the value of a good RS4 will only go one way. The RS4 is the very definition of a "keeper".
|
|
Deleted
Deleted Member
Posts: 0
|
Post by Deleted on Nov 29, 2017 15:52:19 GMT
Chap from DMS says he's not had the problem, but that he has with the injectors which was difficult to diagnose. We'll see, booked in.
|
|
