Cold starting problem

4.2 V8 40v biturbo - 450 bhp
4.2 V8 40v biturbo - 480 bhp (plus)
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DuncRS6
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Re: Cold starting problem

Post by DuncRS6 » Fri Feb 16, 2018 6:43 pm

Mark-RS wrote:
Fri Feb 16, 2018 6:03 pm
It would hold revs and stay in gear for longer and then when breaking seems to jolt into the low gears, I guess as the engine wants to surge and rev...
This is what kind of happened to my car before I got my F125 switch replaced.

It stayed in gear quite long, lifting the throttle then jumped it into the next gear. It cluncked into reverse as well.

Can you check for codes?

That's the first thing I did when I got home and got this code:

17090 - Transmission Range Sensor(F125): Implausible Signal
P0706-35-10 - -- Intermittent

Booked it in with MRC after being quoted £1200 by a so called Audi specialist in Nottingham. Changed the switch and its been as good as gold, MRC didn't find any gearbox codes either.
If an apple a day keeps the doctor away, when doctors eat apples do they disappear?

Mark-RS
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Re: Cold starting problem

Post by Mark-RS » Fri Feb 16, 2018 7:18 pm

Sadly I don't know anyone with Vag-Com. My friend had a code reader, but it didn't seem to be able to read anything....

Box was perfectly fine before the Air flow thing was plugged back in though ?

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DuncRS6
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Re: Cold starting problem

Post by DuncRS6 » Fri Feb 16, 2018 8:10 pm

Best bet would be to get one as soon as your able to.

I just have the one off ebay, which was just the cable and cd and lets me check for codes and clear them, which is pretty much all i needed.

I know it saved me a load of worry being able to check for codes straight after mine cluncked into reverse.

Where do you live? I'm near Nottingham, if your anywhere near me, I'm free most of tomorrow morning , you could pop by and i could plug mine in, not sure how much help it would be.

Although if it is running as bad as you say it be best just to call the garage to have a look at it.
If an apple a day keeps the doctor away, when doctors eat apples do they disappear?

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Shoppinit
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Re: Cold starting problem

Post by Shoppinit » Fri Feb 16, 2018 9:09 pm

Probably nothing terribly serious. Unplugging the maf causes the car to use default values for fuelling. If it's never been plugged in while you've had the car then I suspect you've never developed full power.

First thing to do is log the airflow, see what you're dealing with.
Daytona RS6 C5 Avant. Viper'd, Billies, Waggers, MTM box brain, C6 stoppers, xcarlink, R8 coolant cap (woohoo)
///M3 E46 | XC90 (V8, natch) | Passat GTE | RR Classic V8 flapper
"The major difference between a thing that might go wrong and a thing that cannot possibly go wrong is that when a thing that cannot possibly go wrong goes wrong it usually turns out to be impossible to get at and repair."

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DuncRS6
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Re: Cold starting problem

Post by DuncRS6 » Fri Feb 16, 2018 9:45 pm

Shop if you don't mind me asking, sorry to hijack the thread mark, how have you come to know so much about the c5 RS6.

Is it just down to owning one for a while and coming cross all sorts of problems over the years?

I know when I was lurking before buying I was using this forum as a kind of 'resource hub' and your posts, along with a few others, were one of the factors in helping me find a good one.
If an apple a day keeps the doctor away, when doctors eat apples do they disappear?

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Shoppinit
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Re: Cold starting problem

Post by Shoppinit » Fri Feb 16, 2018 9:52 pm

I don't mind, but I don't really have a good answer for you. Just an interest in the car and spending way too much time on here trying to figure out problems with them.
Daytona RS6 C5 Avant. Viper'd, Billies, Waggers, MTM box brain, C6 stoppers, xcarlink, R8 coolant cap (woohoo)
///M3 E46 | XC90 (V8, natch) | Passat GTE | RR Classic V8 flapper
"The major difference between a thing that might go wrong and a thing that cannot possibly go wrong is that when a thing that cannot possibly go wrong goes wrong it usually turns out to be impossible to get at and repair."

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DuncRS6
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Re: Cold starting problem

Post by DuncRS6 » Fri Feb 16, 2018 10:01 pm

Cheers, I guess if it weren't for people similar to yourself then forums like these wouldn't be as useful as they are or will be for new owners like myself.
If an apple a day keeps the doctor away, when doctors eat apples do they disappear?

Mark-RS
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Re: Cold starting problem

Post by Mark-RS » Sun Feb 18, 2018 2:01 pm

I'm near Northampton so roughly an hour away from you I would imagine.

I certainly think it's something I should invest in. Just see so many on eBay I never know which to go for. I don't need the real deal as I will never use it to it's full extent. Just to read codes and clear them etc....

If anyone can point out something that will do the job I would be grateful.

As for the car I yours with the idea of just unplugging it again, but then decided that's not the way to go with these cars. I'll do it properly ! It's booked back in tomorrow morning to be sorted.

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DuncRS6
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Re: Cold starting problem

Post by DuncRS6 » Sun Feb 18, 2018 3:42 pm

I would be tempted to book it in to MRC as well and get them to do a health check on the car.

They are based in Banbury which, if my geography is correct, will only be a half hour drive from Northampton.

For a code reader I have just got this and it's been perfect for what I needed it for.

https://www.ebay.co.uk/itm/USB-Cable-KK ... 0148.m2813

Cheers

Dunc
If an apple a day keeps the doctor away, when doctors eat apples do they disappear?

Mark-RS
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Re: Cold starting problem

Post by Mark-RS » Mon Feb 19, 2018 7:09 pm

It will certainly go to MRC in the next 6 months or so. I need to save up a bit for a Remap and have them look the car over at the same time.

I've already put it through an MOT and had new control arms fitted, CV boot and a few other bits. I installed and Android head unit. I also want to fit some spacers and fix the drivers door switch.

And since it drinks £80 in fuel each week money is slowly trickling away.

I'm not a rich man by any means and for me to do things right by the car I need to save for them to be done :-(

That reader you linked to, does that include the software ? Or is it just the cable and drivers ? It seems kind of cheap. Most of what I was looking at seem to end up close to £200 when bidding ends :-(

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DuncRS6
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Re: Cold starting problem

Post by DuncRS6 » Mon Feb 19, 2018 7:57 pm

Mark-RS wrote:
Mon Feb 19, 2018 7:09 pm
It will certainly go to MRC in the next 6 months or so. I need to save up a bit for a Remap and have them look the car over at the same time.
Yes I would definitely recommend doing that as soon as you have the spare cash, even if you don't get the remap done a health check is always wise.
Mark-RS wrote:
Mon Feb 19, 2018 7:09 pm
I installed and Android head unit. I also want to fit some spacer.
Which head unit did you get and how much of a pia was it to fit if you don't mind me asking? I think that, spacers and possibly a front splitter, although I know they are a bit marmite, are the next things I will look into getting. Was thinking possibly different alloys but with a little one on the way I think the wife would have my nuts if i rocked up with new rims.
Mark-RS wrote:
Mon Feb 19, 2018 7:09 pm
And since it drinks £80 in fuel each week money is slowly trickling away.

I'm not a rich man by any means and for me to do things right by the car I need to save for them to be done :-(
Yep the costs can be quite eye watering, I used mine as a daily driver for the first 3 months before moving house. On the bright side I did acquire a ton of Shell points.
Mark-RS wrote:
Mon Feb 19, 2018 7:09 pm
That reader you linked to, does that include the software ? Or is it just the cable and drivers ? It seems kind of cheap. Most of what I was looking at seem to end up close to £200 when bidding ends :-(
Yeah it had the CD with the app on it, set it up on your laptop and then just plug it in to the car. Get the right port selected and it will do the job. I usually check it every 2 weeks see if there are any codes just to be on the safe side.

Cheers
:beerchug:
Dunc
If an apple a day keeps the doctor away, when doctors eat apples do they disappear?

Mark-RS
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Re: Cold starting problem

Post by Mark-RS » Mon Feb 19, 2018 8:23 pm

This is the unit I went for.

https://www.ebay.co.uk/itm/KENWOOD-DMX- ... 2749.l2649

Fitting it wasn't to bad once I got my head around the wiring harness adapter. Once I figured out which cable turned on the Amp it worked like a charm. Also ignition and live are backwards as is the case on most Audi's. GPS Antenna mounted above the glove box which was easy to drop down. This also allowed me to pull most of the wiring through the side and also into the glovebox area. Only issue I have is that the unit still does not fit flush against the dash, but when the weather gets a little better, it should be easy enough to sort out. It's one of those things that just takes time and patience.

Thanks for the tip on the reader. Gonna grab me one !

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DuncRS6
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Re: Cold starting problem

Post by DuncRS6 » Mon Feb 19, 2018 8:45 pm

Cheers,

I was looking at the Pioneer one, which a couple of the other forum member have added, but I have always had Samsung mobile so wanted to find something that would work seamlessly with it. I get the feeling the Pioneer ones is more geared to Iphone's but I may be wrong.

No problem! Hope the car gets fixed quickly so you can start enjoying it again! :kissmyrings:
If an apple a day keeps the doctor away, when doctors eat apples do they disappear?

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