Car Broke down! :/ after full revs Any help /advice?

[Bowie69]

Cut your losses, fit a standard alt, and use a different garage.

[twoqu]

It's getting a bit confusing! The mechanic said it was tested yet the alternator guy said it wasn't? Draw your own conclusions, although its seems pretty clear that someone is not telling the truth.
Can you get the old original alternator back? At least you then won't have to pay the surchage for a good quality replacement that way. If it was exchanged at the same place perhaps the alternator guy is honest enough to understand the problem. Mention the fact that you have been told porkies by the mechanic!
Not sure why the alternator was being replaced in the first place but clearly the alternator fitted is not correct for the vehicle. What is the logic of trying to adapt another when correct replacements are available or the original is capable of being reconditioned.
Can only refer you to the comments already made. You need to educate yourself as to whether what you are being told is plausible or not.
It sounds to me the person with the most to lose is the person who worked on your car. Is the car currently with you? Time to get your hands dirty. An alternator replacement should be well within the skill set of an amateur enthuasist with some spanners unless you suffer from some issue like old age (thats for us who are older than our vehicles!).
You are going to have to get the ecu repaired so ensure that this process includes a report as to why the damage has occurred.

[piotr]

Hey guys could the ecu have caused this? I spoke to an alternator guy and he said that these cars with the audis the ecu regulates the alternator. So he couldnt test it without the ecu plaugged in etc .. as it is required to regulate it.

My current plan of action:
Get the alternator now surcharged and buy a new bosch alternator and have it made to fit the car or get original one for this car.

Send ecu off for repair and stress test.

Then once its all back the car should then work.. I will then send the whole car to an electrical specialist to test the whole car and that area to make sure it's not something else that is causing this and iron out any gremlins

ECU regulates the alternator ???I didn't realized that our old S2 have been fitted with smart charge system
So where is the battery monitoring system fitted then??I think the alternator guy is chatting **** unless I'm very wrong here .
Just as above -get the original unit fitted that is dedicated to this make and model and save yourself more problems .

[twoqu]

Another thread which supports thats a correctly sourced A4 alternator can be retro fitted with parts from the original alternator. That could get you out of trouble cheaply.
https://www.s2forum.com/forum/techni...rnator-problem

From what I can tell the alternator that was fitted only has the battery and lamp studs so is not a variant that needs connection to the ecu. In that case it would have the L/DFM terminal block. So I cannot understand what the alternator guy is saying now! Our ecu's do not have any direct connection with the alternator.

[tango123]

i would take the car to someone reputable who understands these cars, who would probably recommened fitting a stock alternator..... just my 2pence

[ringbearer]

I recommend one more visit to the mechanic with a dump truck load of manure, kindly deposit it in an extremely inconvenient location and never go back. Don’t waste your time with uneducated liars and move on. Be grateful it was just an alternator job. You can skip the **** delivery too . Good luck

[steve briance]

All of the above. Sadly, I think you should write off the £200 spent and move on. Chasing people who don't understand what has gone on just seems like an impossible task when it comes to getting your money back, if their GENUINE understanding of the charging system is what they are telling you, they are never likely to agree the problem is their fault.

Satisfy yourself that they will lose any future business with you and anyone who asks you for recommendations for a garage.

When your car is running again, you will either forget about it all or, have more things to spend your time, effort and money on!

[twoqu]

If the specs are correct then the alternator fitted has a 56mm V5 groove pulley whereas the correct spec is a 70mm V4 groove pulley. Could really do with getting at the least your old pulley and plastic cover back. In a sense alternators are dumb ( not as dumb as the people selling or fitting them apparently) and don't know what vehicle they are connected to, could be an S2 or a Saturn V to be topical. Bosch probably make one casing and internals for a certain output and Audi add a different pulley or rear cover and hey presto another part number appears! In theory it should have worked and put out 14.5V. That does not appear to be the case here.
Anyway, hopefully there is a way forward. Either go with a used one and take a punt ot get a recon/new one from a reputable source.
Obviously we were not parties to what was agreed but the facts are an incorrectly sourced alternator appears to have caused an overvoltage issue and damaged the ecu. Somebody is not telling the truth over the testing, sadly perhaps both! Thats why you should have got it tested independently. Still, the ecu repair confirming an overvoltage issue would probably be enough to warrant at the least the threat of a claim. Not that is of much use presently.

[Chris5044]

Hey huge thx guys!!
Sorry also for the confusion, but I think i need to explain that the 2nd time of attempting to test the alternator I took it to a different place top get tested and they said that new info about that they cannot test those ones because of the smart charge system.

The 1st test was from the original supplier and they said they tested it for 1.5 hours... which also the 2nd testing place said that that is ********.

So its like a game of chinese whispers..

I guess I will take this on the chin .. but I need to source a suitable part for this car and I have asked the original garage to see if they can do that now .. but a bosch one.. As they supplied the other they could end up giving me one and using the surcharge, though I did fail to tell them in the first place to fit a bosch one.. though I wouldnt of expected an alternator to go like this .. and the chinese stickers say a lot. :/

I'm wondering if I can hold the original supplier to account if this all works and ecu fitted and I get the whole car electric tested once all fitted ..

hmmm :/

[steve briance]

If I'm not missing something, are you going to spend more money with the garage that caused all this bother in the first place? Why would you do that?!

[martinjs]

Two years ago I had my alternator rebuilt by a local company. It lasted about 10 miles then just stopped charging.
Took it back and they fixed it, then it lasted about 5 miles and died again.
They insisted there was nothing wrong with it and it was something else on the car causing it to die, they fixed it again anyway. Sure enough it broke again.
So I bought a new original and it’s been fine ever since.
Cheap Chinese internals were used I reckon.

[Chris5044]

Two years ago I had my alternator rebuilt by a local company. It lasted about 10 miles then just stopped charging.
Took it back and they fixed it, then it lasted about 5 miles and died again.
They insisted there was nothing wrong with it and it was something else on the car causing it to die, they fixed it again anyway. Sure enough it broke again.
So I bought a new original and it’s been fine ever since.
Cheap Chinese internals were used I reckon.

oh my!

[k.alle]

If I'm reading this thread right and you do in fact have a ECU regulated alternator the switch from china copy to bosch wont help you.
You need a standard S2 alternator which regulates itself.
Or else you might have the same issue again.

I bought mine from German ebay (bosch refurb), which was intended for an S4 AAN engine.
All I had to do was switch pulley to ABY and rear plastic cover as others have pointed out here as well.

IIRC it was around 140-150 € delivered for the 120A version, including the cost for not providing my old alternator as exhange.

[twoqu]

From the information provided we know the following:

1. The S2 Model was not produced with the capability to regulate the voltage output of the alternator.
2.. The correct alternator will be internally regulated via the voltage regulator at 14.5V.
3. The Motronic ecu on the S2 does not have any pin assignments to either accept or send signals to monitor load or control voltage output. I am not aware of any other module on the vehicle that has that capability.
4. The alternator fitted according to the part number is also internally regulated.

If it was hooked up with the factory wiring it cannot be controlled. It is dumb in that sense. If it was not faulty it should have functioned as expected. Why it was necessary to modify an alternator to fit when as discussed the correct variant was available is unknown.

[Chris5044]

From the information provided we know the following:

1. The S2 Model was not produced with the capability to regulate the voltage output of the alternator.
2.. The correct alternator will be internally regulated via the voltage regulator at 14.5V.
3. The Motronic ecu on the S2 does not have any pin assignments to either accept or send signals to monitor load or control voltage output. I am not aware of any other module on the vehicle that has that capability.
4. The alternator fitted according to the part number is also internally regulated.

If it was hooked up with the factory wiring it cannot be controlled. It is dumb in that sense. If it was not faulty it should have functioned as expected. Why it was necessary to modify an alternator to fit when as discussed the correct variant was available is unknown.

Hey thank you, this all makes sense, but the last number 4, they said that they dont do alternators for my vehicle anymore, many shops/garages say this.

So as the customer I'm just doing what I can.

It looks like I will now have to source an alternator that will fit and hope that It will work and be reliable.