VASK Forum (VW Audi SportKlub of NZ)

AUDI => 100 - 200 - S4 - V8 => Topic started by: URS4 Avant on March 18, 2020, 09:50:20 PM

Title: URS4 ECU
Post by: URS4 Avant on March 18, 2020, 09:50:20 PM
Evening, just putting this as a query at this stage. I decided that my perfectly performing urs4 needed more performance and purchased a chip set for it. Have given it to a person who i thought could perform the surgery without any problems. He has had two goes at it now and the car has turned into a lawn ornament. I can see both of us are loosing hope, although he is going to have another go at it.
So has anyone got a spare ecu from one of these cars, mine is a 93 s4 manual with no immobiliser. ECU no. 0 261 200 465/466

Thanks Kev

Title: Re: URS4 ECU
Post by: portmanteau on March 18, 2020, 11:04:10 PM
might these help?

https://www.ebay.de/itm/Audi-Original-Datensatz-Chip-Eproms-S4-S6-AAN-ohne-WFS-4A0907551AA/333503988282

A complete ecu is worth quite a lot of money anywhere on the planet

I have an ecu here, but it stays with harness and engine, for sale complete sorry


Title: Re: URS4 ECU
Post by: URS4 Avant on March 18, 2020, 11:25:35 PM
Blast, i saw you were wrecking that car and had some hope! Fair call you are selling complete. Im down but not out! Hopefully can resurrect what i already have. I have just seen a fair few s4/s6 cars go through trademe recently looking like they will be used as parts. Someone will have an ecu im sure. Also my 1st gear in the early 6spd box is getting a little noisy.. Not selling the g/box are you?
Title: Re: URS4 ECU
Post by: portmanteau on March 18, 2020, 11:34:05 PM
Something will turn up for you

The trans is for sale but un-driven, for obvious reasons if you saw the pics showing the state of the car when I rescued it from an untimely death in the crusher

It was definitely in regular use before being parked up with ignition issues, because I used to drive past it every few weeks

I will be looking for top dollar for the trans. Only pulled it out a few days ago and forgot to take a look to see if it has the wide 1st-gear "bump" but being built late 1994 I don't expect to find that it has

If engine and/or trans don't yet fetch the money I want then I will just keep them as spares for mu own urS4, S2 Nothelle Avant and S2 sedan, until the day arrives that they are the last ones in captivity, if needs be!

Title: Re: URS4 ECU
Post by: portmanteau on March 18, 2020, 11:42:58 PM
Take a look at this for an oddity:

https://www.ebay.com/itm/Volkswagen-VW-Audi-Engine-Computer-ECU-DME-OEM-4A0-997-551-x-0-261-200-466-/233317356033

Not only is it a factory exchange part, but the fan!

If it works, it's cheap, but who would know

Title: Re: URS4 ECU
Post by: URS4 Avant on March 19, 2020, 12:04:26 AM
I hear you, with the box. Mine's still doing ok at this stage. Ill nab one from a b5 S4 when i find one i guess. S2 sedan.. i remember seeing one on trademe years ago (8ish), so upset with myself for not getting it. Was on a dollar reserve auction if i recall.. I had a Sapphire Cosworth at the time so didn't pull the trigger. Im off to investigate that ecu now, i think the X on the end of the audi sticker indicates an immobiliser ecu. But im on to it, good spot. You are better at ebay than i am!
Title: Re: URS4 ECU
Post by: portmanteau on March 19, 2020, 12:11:04 AM
Quote from: URS4 Avant on March 19, 2020, 12:04:26 AM
I hear you, with the box. Mine's still doing ok at this stage. Ill nab one from a b5 S4 when i find one i guess. S2 sedan.. i remember seeing one on trademe years ago (8ish), so upset with myself for not getting it. Was on a dollar reserve auction if i recall.. I had a Sapphire Cosworth at the time so didn't pull the trigger. Im off to investigate that ecu now, i think the X on the end of the audi sticker indicates an immobiliser ecu. But im on to it, good spot. You are better at ebay than i am!

X just means exchange factory rebuilt

there's two S2 sedans in NZ. Mine is the silver one that you probably saw. 11 ever made in RHD

Title: Re: URS4 ECU
Post by: URS4 Avant on March 19, 2020, 04:54:07 PM
Got it, guess i will never know what the ecu was in! S2 sedan is top 5 car for me, I hope to see it one day.
Title: Re: URS4 ECU
Post by: portmanteau on March 19, 2020, 06:26:28 PM
Good luck. I hope it's in good condition, but also you had better be prepared for a possible long delay for getting it shipped to NZ at this point in time

I have a few packages from both UK and Germany that have dropped into black holes at the moment... USA might soon be the same way



Title: Re: URS4 ECU
Post by: le mans on March 19, 2020, 08:23:25 PM
S2 sedan - what a score! from memory the one for sale many tears ago had bolero wheels. Is that the one you bought? It looked so good.
Title: Re: URS4 ECU
Post by: portmanteau on March 19, 2020, 08:27:23 PM
Quote from: le mans on March 19, 2020, 08:23:25 PM
S2 sedan - what a score! from memory the one for sale many tears ago had bolero wheels. Is that the one you bought? It looked so good.

No, mine was/is still on oem Avus

Maybe the other one had the Boleros, but I only ever had those myself on a red S6 Avant, long since sold

Title: Re: URS4 ECU
Post by: user2154 on March 21, 2020, 08:31:42 AM
Bugger I did the same thing three years ago.

If it is a manual you will find one on quattroforum USA or S2forum in UK no problem.


4A0 997 551 is not a URS4/6 ECU!


The URS4/6 ECU is 4A0 907 551 A, AA, B, C, D, E, F



Beware of those Ebay ECU's!

I almost got ripped off by a guy in germany Quattro-Zentrale Gramann on ebay, I paid him 410 Euro and he sent me a dud ECU. I was lucky to get my money back from paypal.


Here is one.

https://forums.quattroworld.com/classifieds-parts/msgs/55420.phtml


Note that you can use a later model immobiliser ECU in an earlier model non ECU vehicle, you just have to chip the board to remove the immobiliser code. Don't ask me how I know.

https://www.s2forum.com/forum/technical/engine-and-turbo/86467-will-urs6-ecu-work-in-my-urs4-automatic

Title: Re: URS4 ECU
Post by: le mans on March 21, 2020, 09:34:10 AM
Another, no doubt more expensive option, would be a plug-in after market ECU. I think these guys have a solid product from what I?ve read. However it then comes down to the skill and knowledge of the tuner to get the car running perfectly.

https://www.maxxecu.com/products/pluginecu (https://www.maxxecu.com/products/pluginecu)
Title: Re: URS4 ECU
Post by: le mans on March 21, 2020, 11:40:48 AM
Could also so be worth a call to Anything Electronic in Nelson to see if they can help. They just repaired my ABS controller (B5 A4).

http://www.anythingelectronic.co.nz/aenz/index.php (http://www.anythingelectronic.co.nz/aenz/index.php)
03 548 5336
Title: Re: URS4 ECU
Post by: portmanteau on March 21, 2020, 11:54:08 AM
Quote from: user2154 on March 21, 2020, 08:31:42 AM

4A0 997 551 is not a URS4/6 ECU!

The URS4/6 ECU is 4A0 907 551 A, AA, B, C, D, E, F


Why then does ETKA list 4A0997551X as "control unit for petrol engine Motronic AAN" and as a replacement for 4A0907551AA and model years  1991 thru 1994 Audi 100?

4A0997551 (without "X" for replacement rebuilt factory exchange part) on the other hand does not appear to be a part number, at all





Title: Re: URS4 ECU
Post by: user2154 on March 21, 2020, 02:45:27 PM
Well I stand corrected.
Title: Re: URS4 ECU
Post by: user2154 on March 21, 2020, 05:56:51 PM
Quote from: URS4 Avant on March 18, 2020, 09:50:20 PM
Evening, just putting this as a query at this stage. I decided that my perfectly performing urs4 needed more performance and purchased a chip set for it. Have given it to a person who i thought could perform the surgery without any problems. He has had two goes at it now and the car has turned into a lawn ornament. I can see both of us are loosing hope, although he is going to have another go at it.
So has anyone got a spare ecu from one of these cars, mine is a 93 s4 manual with no immobiliser. ECU no. 0 261 200 465/466

Thanks Kev

I am interested to know at what point your ECU failed.

When I chipped my original ECU it initially worked, I then chose to pull the ECU and clean the board with compressed isopropyl alcohol, when I reinstalled it the engine would not fire.

Second time around I purchased a soldering station with heat control and did the job proper. I did not attempt to clean the board. Has been running sweet for three years now.

Unfortunately these ECU's are very hard to repair apparently. There is one expert in USA but he did not return my email at the time. I was eventually lucky to get a manual ECU for 90 Euros from the UK. A bargain. I had to chip it to remove the immobiliser function.

A point to note is that if you buy an ECU with immobilser function you plug it in and you engine will run for 3 seconds then cut off. Then you know the ECU is good and can be chipped to remove immobiliser function.

There are many things that can go wrong with a soldering job, cold solder joints etc. Can you post photos of your ECU solder joints?

I am in no way an expert and I recommend you send your ECU to a soldering expert to have the job done right if it is simply a case of bad soldering.
Title: Re: URS4 ECU
Post by: URS4 Avant on March 22, 2020, 12:29:33 PM
Thanks for the reply's chaps. Im hoping to see the guy that did the job today. He is comming to my place to see if we can get it going. The chips came with the car and weren't fitted so i figured hey why not! I had him do my 850 T5 volvo first to check his work haha and that turned out fine. Seems to know a soldering iron from a blow torch.
Have tried to attach a pic of the chips,but the 'upload folder if full' Ill update you all with todays outcome if any.
Title: Re: URS4 ECU
Post by: user2154 on March 23, 2020, 07:33:17 PM
The chips only go in one way and they are obviously different. You sure you got them in the correct orientation?

If your guy did a decent soldering job following basic anti-static precautions then there should be no reason for the board to fail.

But by my example it can happen lol


Title: Re: URS4 ECU
Post by: URS4 Avant on March 23, 2020, 10:13:44 PM
The guy was a no show on moving forward with this unfortunately. I don't feel its the right time to start moaning about car ecu's at the moment! I opened up the Ecu to check the chip orientation and seems to be fine. So full disclosure, when he first did the job he piggy backed the chips over the originals.. Then it didn't work so went back and did it the right way. Now saying he has been finding tunes of the net, so i really don't know what to think. When i turn the ign on in the car, i get the check light on as i should and can hear all the associated relays clicking just like it did when it was fine. I heard him say and now got me thinking, is it possible to load a automatic tune onto a chip? Should i try and ground pin 42 on the main connector?
I see someone on trademe has a Auto ecu for sale.. I don't know lol.
Title: Re: URS4 ECU
Post by: URS4 Avant on March 23, 2020, 10:15:24 PM
I would post pics but the uploader function tells me its full..
Title: Re: URS4 ECU
Post by: portmanteau on March 23, 2020, 10:18:18 PM
did I understand you correctly that you have actually bought the "X" part on Ebay?

Reason I ask is that Ebay GSP shipping still seems to be functioning, perhaps a little slower than usual, and also I just received a Deutschepost/DHL item from Ebay Germany today. I don't have any experiences with Ebay out of USA in the last couple of weeks though
Title: Re: URS4 ECU
Post by: URS4 Avant on March 23, 2020, 10:28:50 PM
Sorry no, still on my original ecu. I know this sounds weird, but can you load a auto tune onto a chip?
(https://i.imgur.com/GEaPCu7.jpg)
Title: Re: URS4 ECU
Post by: URS4 Avant on March 23, 2020, 10:30:35 PM
(https://i.imgur.com/oExe0Z5.jpg)
(https://i.imgur.com/FYb7Rqk.jpg)
(https://i.imgur.com/yS0MxNz.jpg)
Title: Re: URS4 ECU
Post by: portmanteau on March 23, 2020, 10:38:44 PM
Quote from: URS4 Avant on March 22, 2020, 12:29:33 PM
Thanks for the reply's chaps. Im hoping to see the guy that did the job today. He is coming to my place to see if we can get it going. The chips came with the car and weren't fitted so i figured hey why not! I had him do my 850 T5 volvo first to check his work haha and that turned out fine. Seems to know a soldering iron from a blow torch.
Have tried to attach a pic of the chips,but the 'upload folder if full' Ill update you all with todays outcome if any.

Did your guy fit the socket(s) in the pics?
Title: Re: URS4 ECU
Post by: URS4 Avant on March 23, 2020, 10:52:31 PM
yes.
Title: Re: URS4 ECU
Post by: portmanteau on March 23, 2020, 10:55:28 PM
Quote from: URS4 Avant on March 23, 2020, 10:52:31 PM
yes.

The work does not in all honesty look terribly flash. Did he do it all by hand with a conventional soldering iron?
Title: Re: URS4 ECU
Post by: URS4 Avant on March 23, 2020, 10:57:30 PM
I really don't know to be honest.
Title: Re: URS4 ECU
Post by: portmanteau on March 23, 2020, 11:03:50 PM
Quote from: URS4 Avant on March 23, 2020, 10:57:30 PM
I really don't know to be honest.

What is preventing you from reinstalling the original chips. now that sockets are fitted; did he destroy them when removing?  Sorry if I missed something here
Title: Re: URS4 ECU
Post by: URS4 Avant on March 23, 2020, 11:11:48 PM
Fair question, im just waiting to hear from him at this stage. I hope he still has them. Ill post back when i make contact with him.
Title: Re: URS4 ECU
Post by: user2154 on March 24, 2020, 06:36:20 PM
Obviously a bad time for shipping due to the current virus but I think you have to cut your losses and source a known good ECU from a reputable seller, ie quattroforum rather than ebay.

Bad time for your vehicle to go down though. You may be lucky to get it going by the end of the year unless you can source an ECU locally.

Another way maybe to source some known good chips and try them. Maybe you can take your ECU to someone locally to swap chips?
Title: Re: URS4 ECU
Post by: user2154 on May 02, 2020, 05:57:17 PM
Any resolution to this?

Just looking at the third photo you posted, looks like scratches in the PCB. This could be a cause of your dead ECU. Maybe an option to send your ECU to a PCB expert for inspection.
Title: Re: URS4 ECU
Post by: URS4 Avant on May 03, 2020, 07:54:01 PM
Hey all, thanks for your input on my ECU problem. No resolution has been found yet. Mostly because of covid 19, and a little because im feeling a bit down about the whole thing! So the car sits in the drive and haven't heard from the ecu chap. Waiting till level 2 before i get back into investigations!
Title: Re: URS4 ECU
Post by: 80 Vert on May 03, 2020, 09:17:14 PM
You could try Anything Electronic in Nelson to look over it, have found them very good over the years.
The other is EFI tech / Car computers. Might be worth a call.
Title: Re: URS4 ECU
Post by: 89 Coupe on May 20, 2020, 02:54:06 PM
Quote from: URS4 Avant on March 18, 2020, 11:25:35 PM
Blast, i saw you were wrecking that car and had some hope! Fair call you are selling complete. Im down but not out! Hopefully can resurrect what i already have. I have just seen a fair few s4/s6 cars go through trademe recently looking like they will be used as parts. Someone will have an ecu im sure. Also my 1st gear in the early 6spd box is getting a little noisy.. Not selling the g/box are you?

If you want to sell the noisy gearbox? I'd be interested for my S4
Title: Re: URS4 ECU
Post by: URS4 Avant on May 20, 2020, 11:03:56 PM
Nah the 6spd is still in the car, and with the ecu the way it is i imagine it has plenty of life left in it!
Title: Re: URS4 ECU
Post by: user2154 on May 22, 2020, 08:14:48 PM
He piggy backed the ECU chips over the original? I don't remember reading that in the chip tune upgrade manual...

You cannot find "tunes from the net". You either have the chips or you don't...

There is no "automatic tune" that you can load onto your chips to make it magically repair itself.



You have two options.

1. buy a chipped ECU from quatrroforum.com classifieds. ($500 USA) Guaranteed good ECU.

2. send you ECU to an expert to determine if the tracers are broken or not. ($ XXX)
Title: Re: URS4 ECU
Post by: HaNs on May 22, 2020, 09:56:16 PM
Quote from: user2154 on May 22, 2020, 08:14:48 PM
He piggy backed the ECU chips over the original? I don't remember reading that in the chip tune upgrade manual...

It just looks to be in a socket. Even OEM's in the 80's and 90's did this.

Title: Re: URS4 ECU
Post by: user2154 on May 23, 2020, 06:35:58 PM
Quote from: HaNs on May 22, 2020, 09:56:16 PM
It just looks to be in a socket. Even OEM's in the 80's and 90's did this.

Socket is the right way to do it yes, sorry I was confused by his statement.

Other option is to buy some other chips to determine if the current chips are legit.
Title: Re: URS4 ECU
Post by: URS4 Avant on June 05, 2020, 09:20:34 AM
Have had the original chip fitted back to the ecu via the socket. Car is still no start. Originally the guy did piggy back the new chip onto the old original chip, this is what he did to my Volvo. On the volvo he put a switch which allows to switch from the original chip to the new chip and that works. But did not on the Audi. So then socketed the ECU for the after market chip, still no go. Soldered legs back onto the original chip and plugged them in and no go. Am sending to ALT Tune CHCH and Cody is going to send it to their specialist for testing. Will see what happens.
Title: Re: URS4 ECU
Post by: portmanteau on June 05, 2020, 10:46:23 AM
I think you are about to hear a number of opinions about whether your guy should be going anywhere near other peoples' cars, and all of those opinions will be valid
Title: Re: URS4 ECU
Post by: user2154 on June 05, 2020, 06:47:08 PM
Stock AAN ECU US$350 (these are from the USA so will be from a manual transmission vehicle).

Item 5 on the list.

https://forums.quattroworld.com/classifieds-parts/msgs/54261.phtml

I have a manual ECU in my auto and it works fine but it is chipped with PRJ chips. It is a later model IMMO ECU so you have to chip it to get around the IMMO function. Maybe a non IMMO manual ECU will work in a non IMMO auto vehicle with no chips? I do not know.

I don't know if the chips are auto or manual specific, my guess is any chipped ECU will work in an auto but YMMV. Do you have an auto or a manual transmission? It worked for me and it worked another, see post #7 in this thread.

https://www.s2forum.com/forum/technical/engine-and-turbo/86467-will-urs6-ecu-work-in-my-urs4-automatic


Another chipped manual ECU

https://forums.quattroworld.com/classifieds-parts/msgs/55833.phtml


Title: Re: URS4 ECU
Post by: URS4 Avant on June 05, 2020, 10:45:36 PM
My car is a 6spd manual, 1993 with no immo. Thank you for the links, you seem to have a good nose for the right parts! I will still get the ecu specialist to check my ECU first, then if that fails chase one of these guys for a replacement. Mine is weird, when i turn the key i can still hear all the item clicking under the bonnet (n75, icv etc) like it did before, checked in the weekend and the G40 sensor flashes a led when wired of the plug. Fuel pump comes on and injectors fire just has no spark. So maybe something minor.
Title: Re: URS4 ECU
Post by: user2154 on June 06, 2020, 09:04:17 AM
Quote from: URS4 Avant on June 05, 2020, 10:45:36 PM
My car is a 6spd manual, 1993 with no immo. Thank you for the links, you seem to have a good nose for the right parts! I will still get the ecu specialist to check my ECU first, then if that fails chase one of these guys for a replacement. Mine is weird, when i turn the key i can still hear all the item clicking under the bonnet (n75, icv etc) like it did before, checked in the weekend and the G40 sensor flashes a led when wired of the plug. Fuel pump comes on and injectors fire just has no spark. So maybe something minor.


According to the US forum the ECU ignition coil driver is NLA so it doesn't sound good if you have no spark. This is the demise of a lot of ECU's apparently.

Maybe you get lucky and it is just a broken trace. Would be interested to know what was wrong if they can fix it.

https://forums.quattroworld.com/s4s6/msgs/363346.phtml



Chipped ECU's normally go for about US$500 I think. Or buy a non-chipped ECU and get them to ship it to this guy in the US to chip it before sending it over. That's the way I would go.

http://www.efiexpress.com/catalog/





Title: Re: URS4 ECU
Post by: user2154 on February 01, 2021, 03:53:30 PM
Did you get this fixed?
Title: Re: URS4 ECU
Post by: URS4 Avant on April 06, 2021, 03:10:34 PM
Hello again..!

No it did not entirely get fixed. I have bought a ECU locally with the 'F' prefix. So immo and auto I believe.

Plugged it in and the car instantly burst into life, for about 4 seconds.

Bought a cheap VAG immo emulator from ebay to try, connected to + / - and the K line under the bonnet. Cranked started then stopped again.

The ECU i purchased is socketed and is running genuine MTM software. So, and it looks like you have more history with these things than i have.. if i was to purchase a set of chips without immo software do you think i would be all good?!

Kev
Title: Re: URS4 ECU
Post by: 89 Coupe on April 07, 2021, 12:47:07 AM
Is this the ECU you are looking for? 4A0 907 551B

https://www.trademe.co.nz/a/motors/car-parts-accessories/audi/listing/3043661295?bof=v2KqV4Nk (https://www.trademe.co.nz/a/motors/car-parts-accessories/audi/listing/3043661295?bof=v2KqV4Nk)
Title: Re: URS4 ECU
Post by: user2154 on August 05, 2021, 08:22:16 PM
Quote from: 89 Coupe on April 07, 2021, 12:47:07 AM
Is this the ECU you are looking for? 4A0 907 551B

https://www.trademe.co.nz/a/motors/car-parts-accessories/audi/listing/3043661295?bof=v2KqV4Nk (https://www.trademe.co.nz/a/motors/car-parts-accessories/audi/listing/3043661295?bof=v2KqV4Nk)

551B is for Auto so is not what he is looking for but then again the 551F is also for Auto..
Title: Re: URS4 ECU
Post by: user2154 on August 05, 2021, 08:28:23 PM
Quote from: URS4 Avant on April 06, 2021, 03:10:34 PM
Hello again..!

No it did not entirely get fixed. I have bought a ECU locally with the 'F' prefix. So immo and auto I believe.

Plugged it in and the car instantly burst into life, for about 4 seconds.

Bought a cheap VAG immo emulator from ebay to try, connected to + / - and the K line under the bonnet. Cranked started then stopped again.

The ECU i purchased is socketed and is running genuine MTM software. So, and it looks like you have more history with these things than i have.. if i was to purchase a set of chips without immo software do you think i would be all good?!

Kev

If it fires then it is a good sign that the ECU will run the engine. The IMMO is cutting out after about 4 seconds I had the same thing installing an S6 ECU into an S4 before I chipped it. If you install new chips without the IMMO function then it should run. But you have an auto ECU in a manual, I am not sure if you need to do any other modifications, google it.

My advice is buy some chips from the USA they only have manuals over there.

Try EFI Express. https://shop.efiexpress.com/

Also google auto to manual conversion as this has been done and you should find some information about using an auto ECU in a manual.
Title: Re: URS4 ECU
Post by: URS4 Avant on August 29, 2022, 09:57:41 PM
Thanks for all the help above. I ended up swapping my mtm auto ecu with a chap on s2 forums and he sent me the ECU I needed. The S4 has been running mint ever since.
Title: Re: URS4 ECU
Post by: slowburn on August 29, 2022, 10:05:57 PM
result
Title: Re: URS4 ECU
Post by: user2154 on August 30, 2022, 07:57:31 PM
Quote from: URS4 Avant on August 29, 2022, 09:57:41 PM
Thanks for all the help above. I ended up swapping my mtm auto ecu with a chap on s2 forums and he sent me the ECU I needed. The S4 has been running mint ever since.

Nice one. Hope you can afford to run it with the petrol prices right now lol.