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Author Topic: Problem with the S3, strange.. Help would be great!  (Read 19432 times)

Offline jonnyc

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Re: Problem with the S3, strange.. Help would be great!
« Reply #15 on: July 21, 2009, 10:26:19 pm »
Quote from: illyun on July 21, 2009, 09:34:51 pm
Hope you get it sorted Jonny... surely the seller must have known about the fault  :fighting:  At least its still under warranty. 
Sorry couldn't be of any help though  :chicken:

Thanks mate..

Got the borescope going in tomorrow to have a look around.. If thats inconclusive then a cylinder leak down test.. Then its going to be head off, as im pretty sure there is no/not enough compression on cylinder one..

Im really hoping that its a sticky valve, but that would be easy and relatively cheap to fix.. So its probably a melted piston and a score block.. ARRRGGHHHH...
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Offline iainalpine

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Re: Problem with the S3, strange.. Help would be great!
« Reply #16 on: July 22, 2009, 07:43:12 am »
Jonny, if you could get your hands on an Oscilloscope you could scope the primary winding of the ignition coil. This will tell you alot about whats going on. A large induced voltage shown on the screen will confirm that your getting good compression and that the coil is doing its job (the higher the compression the more voltage thats induced). also from this you can see the spark duration, switched earth from the ecu and main feed for the coil. I dont think that it will be the main feed for the coil as they all share the same feed.
All this aside, a coolant temp sensor will make the car turn over more on crank and on some cases cause a missfire. Check out the voltage going to this (should be 5v) at the plug (unplugged from sensor) and plugged in with ambient temp around 20'c' a voltage of around 3.6v.

Hope you get to the bottom of it.

Iain
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Offline jonnyc

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Re: Problem with the S3, strange.. Help would be great!
« Reply #17 on: July 22, 2009, 11:12:18 am »
Quote from: iainalpine on July 22, 2009, 07:43:12 am
Jonny, if you could get your hands on an Oscilloscope you could scope the primary winding of the ignition coil. This will tell you alot about whats going on. A large induced voltage shown on the screen will confirm that your getting good compression and that the coil is doing its job (the higher the compression the more voltage thats induced). also from this you can see the spark duration, switched earth from the ecu and main feed for the coil. I dont think that it will be the main feed for the coil as they all share the same feed.
All this aside, a coolant temp sensor will make the car turn over more on crank and on some cases cause a missfire. Check out the voltage going to this (should be 5v) at the plug (unplugged from sensor) and plugged in with ambient temp around 20'c' a voltage of around 3.6v.

Hope you get to the bottom of it.

Iain

Thanks for that.. I now know what it is.. Unfortunately a large hole in no.1 piston.. So that would explain it, its what I first thought but didnt want to believe it really! Now the head needs to come off to check for damage to the bore, if thats ok then its just a case of building the engine, if its scored, then it means a new block! Not good news..

The thing is now I need to know why it has this problem and what has caused it as I cant have this happen again!
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Build thread http://www.vagoc.co.uk/vb/showthread.php?t=3128

Offline MAT ED30

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Re: Problem with the S3, strange.. Help would be great!
« Reply #18 on: July 22, 2009, 11:23:15 am »
bollox mate thats not good  :sad1: could it have been lack of oil as i bet it would use lots of the stuff and has the last owner looked after the car?
« Last Edit: July 22, 2009, 11:36:24 am by MAT ED30 »
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Offline gazbutS3

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Re: Problem with the S3, strange.. Help would be great!
« Reply #19 on: July 22, 2009, 12:22:36 pm »
Thats a bit of an @rse Jonny, its strange that bigandy's was cylinder 1 too, I wonder if theres something in it or just a coincidence :sad1:
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Offline jonnyc

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Re: Problem with the S3, strange.. Help would be great!
« Reply #20 on: July 22, 2009, 12:30:50 pm »
Quote from: gazbutS3 on July 22, 2009, 12:22:36 pm
Thats a bit of an @rse Jonny, its strange that bigandy's was cylinder 1 too, I wonder if theres something in it or just a coincidence :sad1:

I would expect just a coincidence to be honest.. The problem is that if its taken the block with it! There 2.5k from Audi, then 1k for bits to put inside, and a couple of grand for labour.. Honestly, buying this car is the worst thing I have ever done!
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Build thread http://www.vagoc.co.uk/vb/showthread.php?t=3128

Offline Hurdy

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Re: Problem with the S3, strange.. Help would be great!
« Reply #21 on: July 22, 2009, 02:02:03 pm »
PM sent Jonny :happy2:
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Offline MAT ED30

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Re: Problem with the S3, strange.. Help would be great!
« Reply #22 on: July 22, 2009, 03:07:35 pm »
there is one option but its on your drive  :ashamed:
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Offline snapey

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Re: Problem with the S3, strange.. Help would be great!
« Reply #23 on: July 22, 2009, 03:17:17 pm »
sh*t the bed dude, surely you should be able to get it all done under warranty?

Well you'd like to think.....

Luke
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Offline jonnyc

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Re: Problem with the S3, strange.. Help would be great!
« Reply #24 on: July 22, 2009, 03:33:21 pm »
Quote from: MAT ED30 on July 22, 2009, 03:07:35 pm
there is one option but its on your drive  :ashamed:

Lol, dont think so..  :grin:

Quote from: snapey on July 22, 2009, 03:17:17 pm
sh*t the bed dude, surely you should be able to get it all done under warranty?

Well you'd like to think.....

Luke

Engine has a big turbo fitted, different injectors etc.. They would just laugh at me I think, could be worth a go I guess..
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Offline snapey

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Re: Problem with the S3, strange.. Help would be great!
« Reply #25 on: July 22, 2009, 03:42:02 pm »
Quote from: jonnyc on July 22, 2009, 03:33:21 pm
Quote from: MAT ED30 on July 22, 2009, 03:07:35 pm
there is one option but its on your drive  :ashamed:

Lol, dont think so..  :grin:

Quote from: snapey on July 22, 2009, 03:17:17 pm
sh*t the bed dude, surely you should be able to get it all done under warranty?

Well you'd like to think.....

Luke

Engine has a big turbo fitted, different injectors etc.. They would just laugh at me I think, could be worth a go I guess..

Is trying to get hold of standard parts not a option and down right lieing to them about the vehilces past. Then sell the parts on after it might cost you a couple of hundred in depreciation on the parts but a hell of a lot cheaper in the long run.

I'm sure you know enought people in the trade to get a few favours.

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Offline luca

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Re: Problem with the S3, strange.. Help would be great!
« Reply #26 on: July 22, 2009, 04:14:23 pm »
Gutted for you jonny :sad:
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Offline JPC

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Re: Problem with the S3, strange.. Help would be great!
« Reply #27 on: July 22, 2009, 04:16:42 pm »
sorry to hear that jonny. not good news at all. surely that must have been a heat issue due to lack of oil maybe?
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Offline jonnyc

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Re: Problem with the S3, strange.. Help would be great!
« Reply #28 on: July 22, 2009, 04:23:05 pm »
Quote from: JPC on July 22, 2009, 04:16:42 pm
sorry to hear that jonny. not good news at all. surely that must have been a heat issue due to lack of oil maybe?

Well put it this way, I drove the car home 60miles and its melted a piston.. I was in torrential rain all the way back taking it very steady.. So its not me, the car was probably already goosed.. But proving that is going to be the problem

Vag com showed 3 coolant temp warnings, personally, I think its either got very hot, and then been topped up with water and quickly sold on, or ran with hardly any oil in it, topped up and nothing has been said..
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Offline MAT ED30

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Re: Problem with the S3, strange.. Help would be great!
« Reply #29 on: July 22, 2009, 04:30:38 pm »
that sounds about it to me mate  :sad1:  have u had a chat with the old owner?
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