996 C4s ENGINE BLOWN HELP - Please !!

996 C4s ENGINE BLOWN HELP - Please !!

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w8ssa

Original Poster:

94 posts

206 months

Tuesday 22nd April 2008
quotequote all
Hi Guys
I picked up my c4s 2002 on Saturday.
I was driving back home Monday afternoon doing about 55mph in 5th when all of a sudden the car juddered and the dash displayed ' ABS FAILURE' get to a porsche dealership immediately
I pooped my pants and rolled her into the layby.
I sat thier with all the lights on the dash and engine would not start?
The garage dealer came and rescued me and said perhaps its a dead battery? we tried new battery.. still no life? he then said try and start her up while I watch from the engine.
Black smoke then appeared and he said your alternator has just gone, dont worry we will take care of it ( only had 2 days) and get it back to you tomorow.
Then sitting at home waiting for them to call and say all fixed come and get her.......... he said you have over revved the car and shot the pistons and the car needs a new engine £8k what do you want to do?

Your help is needed
Many Thanks


Edited by w8ssa on Tuesday 22 April 20:42

M3MTH

1,955 posts

228 months

Tuesday 22nd April 2008
quotequote all
Damn! did you buy it from a main agent?

w8ssa

Original Poster:

94 posts

206 months

Tuesday 22nd April 2008
quotequote all
M3MTH said:
Damn! did you buy it from a main agent?
a very well respected dealership near to me who sell porkers and nothing else.

porscheuro

1,384 posts

206 months

Tuesday 22nd April 2008
quotequote all
they ahve something in the engine ecu called actual values which has 4 rev ranges i think and this is how they avoid doing jobs under warranty sometimes,what they do is check for rev ranges 3 and 4 and see how many times its been in this band...
usually when piston or something severe goes wrong with engine its usually caused by intermediate shaft letting go at the gearbox end throwing all the timing out.hey presto major damage,plenty of places to get an engine cheaper though

M3MTH

1,955 posts

228 months

Tuesday 22nd April 2008
quotequote all
what warranty cover were you supplied with?. my thoughts are that the car was sold with an unknown fault to them, ask them if they done a pre-inspection on the car, if so ask to see it. at the very least, worst comes to worst they should offer goodwill and help you out with the bill.

w8ssa

Original Poster:

94 posts

206 months

Tuesday 22nd April 2008
quotequote all
M3MTH said:
what warranty cover were you supplied with?. my thoughts are that the car was sold with an unknown fault to them, ask them if they done a pre-inspection on the car, if so ask to see it. at the very least, worst comes to worst they should offer goodwill and help you out with the bill.
I have 3 months or 3000 miles which ever comes sooner included but they have insisted that they will not be held responsible for driver damage.
Considering I have had 2 1/2 days driving in this car I think its terrible.
I have a close friend who races for Porsche and he has never heard so much rubbish! he has told me which route to go down though but I just would like to know why this has happened when I have not red lined it or dropped down from 5th to 2nd gear etc?
It just died on me when I was doing 50-55mph.


w8ssa

Original Poster:

94 posts

206 months

Tuesday 22nd April 2008
quotequote all
porscheuro said:
they ahve something in the engine ecu called actual values which has 4 rev ranges i think and this is how they avoid doing jobs under warranty sometimes,what they do is check for rev ranges 3 and 4 and see how many times its been in this band...
usually when piston or something severe goes wrong with engine its usually caused by intermediate shaft letting go at the gearbox end throwing all the timing out.hey presto major damage,plenty of places to get an engine cheaper though
Thanks for your advice, I can confirm that I was only doing 55mph and did not drop down from a high gear to a low gear.
Any other ideas which may of caused this?
They did mention that it has gone into Rev 2 which is why the pistons are shot and bent.??

Look forward to your advice.

7357

2,648 posts

222 months

Tuesday 22nd April 2008
quotequote all
Trading standards !

RSGulp

1,472 posts

253 months

Tuesday 22nd April 2008
quotequote all
Is the broken car the one photographed in your profile?
Was the photograph taken at the dealership you bought it from?

If the answer to both of these questions is "yes", and what you are saying about never over-revving the engine is true, then I am extremely surprised you are in the situation you find yourself in. eek

Edited to say: If you have just borrowed that image and you didn't purchase from that dealer I will delete this post.


Edited by RSGulp on Tuesday 22 April 21:46

w8ssa

Original Poster:

94 posts

206 months

Tuesday 22nd April 2008
quotequote all
RSGulp said:
Is the broken car the one photographed in your profile?
Was the photograph taken at the dealership you bought it from?

If the answer to both of these questions is "yes", then I would be very surprised you are in the situation you find yourself in. eek
yeah you obviously know who i bought it from? I didnt want to get into bad nameing people as they have been superb up until now.
Just cant believe it can happen to mecry

Crimp a Length!

5,697 posts

237 months

Tuesday 22nd April 2008
quotequote all
RSGulp said:
Is the broken car the one photographed in your profile?
Was the photograph taken at the dealership you bought it from?

If the answer to both of these questions is "yes", then I would be very surprised you are in the situation you find yourself in. eek
Likewise.
Sorry to hear you're luck hope you sort this fella surely with a car costing over 30k and the fact you have not had it 2 mins the dealer if it is who i think it is will sort this?
Keep us informed and good luck.

RSGulp

1,472 posts

253 months

Tuesday 22nd April 2008
quotequote all
Does anyone know if the ecu records 'when' the engine was over-revved - e.g. date/time or at what mileage?

M3MTH

1,955 posts

228 months

Tuesday 22nd April 2008
quotequote all
w8ssa said:
RSGulp said:
Is the broken car the one photographed in your profile?
Was the photograph taken at the dealership you bought it from?

If the answer to both of these questions is "yes", then I would be very surprised you are in the situation you find yourself in. eek
yeah you obviously know who i bought it from? I didnt want to get into bad nameing people as they have been superb up until now.
Just cant believe it can happen to mecry
Should make for an interesting thread. but might be a good idea to change the photo because many people will recognise it if you want to keep it all discreet if you know what i mean

sleep envy

62,260 posts

263 months

Tuesday 22nd April 2008
quotequote all
w8ssa said:
RSGulp said:
Is the broken car the one photographed in your profile?
Was the photograph taken at the dealership you bought it from?

If the answer to both of these questions is "yes", then I would be very surprised you are in the situation you find yourself in. eek
yeah you obviously know who i bought it from? I didnt want to get into bad nameing people as they have been superb up until now.
Just cant believe it can happen to mecry
this'll be interesting

Hope H comes good with a rev range investigation, good luck!

Geneve

3,970 posts

233 months

Tuesday 22nd April 2008
quotequote all
An 'over-rev' (normally caused by a missed upshift that the rev limiter can't cope with), can cause damage that doesn't manifest itself for sometime. The engine has been damaged, but lets go hundreds, or even thousands, of miles later.

richardb.jones

326 posts

239 months

Tuesday 22nd April 2008
quotequote all
As has been explained there are two types of over-rev - 1st is limited by the engine management system and happens when you redline it - no big deal and should not be a problem. The 2nd type is mechanical and happens when the engine is pushed by the wheels to over rev - the engine management cannot correct this - ie put the car in a low gear at speed.

All these are recorded in the on board computer - so it should be a simple case of 'when' the over rev happended. If it was in the last 2 days, then either you did it, if it was prior to this - then the car was sold to you knowing it had one. If the latter is true - then ask for a full refund or trading standards will be called ...

An OPC should be able to provide you with this info from portable diagnostic equipment.

Grey Ghost

4,605 posts

234 months

Tuesday 22nd April 2008
quotequote all
Could you have the car recovered to an official OPC who can check the ECU records and give you a readout of the claimed incident ?????

Crimp a Length!

5,697 posts

237 months

Tuesday 22nd April 2008
quotequote all
Forgive me for my apparent lack of knowledge here but don't these cars have rev limiters on them?

w8ssa

Original Poster:

94 posts

206 months

Tuesday 22nd April 2008
quotequote all
Crimp a Length! said:
Forgive me for my apparent lack of knowledge here but don't these cars have rev limiters on them?
yeah they do, u would of thought a porsche is a sports car ay!? made to go a little bit fast??

w8ssa

Original Poster:

94 posts

206 months

Tuesday 22nd April 2008
quotequote all
richardb.jones said:
As has been explained there are two types of over-rev - 1st is limited by the engine management system and happens when you redline it - no big deal and should not be a problem. The 2nd type is mechanical and happens when the engine is pushed by the wheels to over rev - the engine management cannot correct this - ie put the car in a low gear at speed.

All these are recorded in the on board computer - so it should be a simple case of 'when' the over rev happended. If it was in the last 2 days, then either you did it, if it was prior to this - then the car was sold to you knowing it had one. If the latter is true - then ask for a full refund or trading standards will be called ...

An OPC should be able to provide you with this info from portable diagnostic equipment.
thanks for your advice.