Problem with the S3, strange.. Help would be great!

[jonnyc]

Hope you get it sorted Jonny... surely the seller must have known about the fault    At least its still under warranty. 
Sorry couldn't be of any help though 

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...

[iainalpine]

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

[jonnyc]

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!

[MAT ED30]

bollox mate thats not good   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?

[gazbutS3]

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

[jonnyc]

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

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!

[Hurdy]

PM sent Jonny

[MAT ED30]

there is one option but its on your drive 

[snapey]

sh*t the bed dude, surely you should be able to get it all done under warranty?

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

Luke

[jonnyc]

there is one option but its on your drive 

Lol, dont think so.. 

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..

[snapey]

there is one option but its on your drive 

Lol, dont think so.. 

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.

[luca]

Gutted for you jonny

[JPC]

sorry to hear that jonny. not good news at all. surely that must have been a heat issue due to lack of oil maybe?

[jonnyc]

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..

[MAT ED30]

that sounds about it to me mate    have u had a chat with the old owner?