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Discussion Starter #1
Hi Guys,

I have a Corsa 1.3 CDTI 08 with a water damaged ecu that I could do with some pointers with.

So first started noticing it losing power, then when started it wouldnt rev, got it plugged in at the closest garage and he said ECU. Ive since took the ecu out ( no real signs of pooled water or sludge or anything in the area) and opened it up and there was signs of corrosion, not loads but enough to not be good, Ive gently cleaned this up and its come up better then i thought but you cant tell with these things. I took the battery out and recharged it whilst i had the ecu out. Ive put the ecu and battery back in today and when I turn the ignition i just get a lot of clicks and buzzes, the clocks click and not much else happens. Ive got some before and after photos of the ecu and a vid of what happens when you turn the key,


Thanks (y)
 

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Hi Guys,

I have a Corsa 1.3 CDTI 08 with a water damaged ecu that I could do with some pointers with.

So first started noticing it losing power, then when started it wouldnt rev, got it plugged in at the closest garage and he said ECU. Ive since took the ecu out ( no real signs of pooled water or sludge or anything in the area) and opened it up and there was signs of corrosion, not loads but enough to not be good, Ive gently cleaned this up and its come up better then i thought but you cant tell with these things. I took the battery out and recharged it whilst i had the ecu out. Ive put the ecu and battery back in today and when I turn the ignition i just get a lot of clicks and buzzes, the clocks click and not much else happens. Ive got some before and after photos of the ecu and a vid of what happens when you turn the key,


Thanks (y)
It might not of been water causing ecu to need replaced sometimes they just brake through vibrations etc you can send them away to get fixed which will save you from having to reprogram a new one in
 

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Thats pretty bad, the problem with this ecu is that its a multi layer board so water ingress to that extent is not repairable, someone might get it to work but you will constantly have running issues, replacing it is the most economical repair for your wallet and sanity.
 

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Discussion Starter #4
thanks for the replies guys.

so replacing, ive had a quick search and i can only find a few second hand ones in the £250 mark, is that about right for them? and then have it recoded to my car. what else would i need to code it to my car hardware wise?

thanks

Reen
 

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The price sounds about right for a used unit just be aware it may also have had water ingress,... to coding the ecu to your car can be done with Opcom/Vauxcom so long as you have the cars security code and the replacement has been reset or comes with its own security code so you can reset it yourself, the other way is to swap the Eeprom from your old ecu to the new, no programming needed then,... the only other thing to be aware of is there are two different software, so make sure you get one with the same numbers, if you dont you will need to have the ecu SPS updated using Tech2 and GlobalTis.
 

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Discussion Starter #6
ok great thanks for your help, i have a opcom on order and i might not be to handy with a car but i am with a computer so if i can plug it in to one im sure i can find my way from there, if not i might ask lol

thanks again for your help
 

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How did you get on Reen? Got the same problem now, 1.3 diesel Corsa only 84k I got ECU out and it had been out before one screw missing and unit covered in sealant and the missing screw was hiding underneath it. I just want the cheapest option and then keep my fingers crossed its such a great economical car.
 

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Discussion Starter #8
ive just got my opcom so intend to plug it in tomorrow and then see if i can get anything out of my cleaned ecu, not hopeful, then its trying to find a second hand one thats not water damaged for less than £1000000 lol (well from what ive seen youre looking at 250-400) and then recoding it, fortunately i think i can do that myself but so im informed people charge a bit to recode them too, so non of it is as cheap as id like it to be
 

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Discussion Starter #10
Hi Guys,

Just wanted to give you all a little update.

I found someone who'd clone my ecu with a remanufactured one for £450, I had to send my ecu and the body control fuse box, service was swift and after about 4 days i got back a shiny one and my fuse box. Put it in my car and it was exactly the same, no change would rev, smoke screen out the back. I messaged the guy i got the ecu off asking if he had any suggestions and replied with in a very short period of time that my erg valve is stuck and thats what the problem was and I'd need a new one. At the time i felt as though he could have maybe suggested i have a look at that before sending the ecu off. I got a blanking plate for it for abut £3.50 and stuck that in and the cars working fine.

So it might not have been my ecu at all, I might have paid £450 for the information to then fix it for £3.50 temporarily. Im just go and give the benefit of the doubt, my ecu was in a pretty bad way so if it was working id imagine it was only a matter of time before i would have had to replace it, saying that i might just have my old ecu in a shiny new case, hopefully I'll never have to find out!

Thanks for all your help guys
 

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Make sure the ECU case is fully sealed and that the bulkhead drains are clear. The 1.3 Corsa has to be one of the most ECU replacement jobs there is, and as long as you have a replacement that has been reset or you have its security code, and your original one as well it's pretty straightforward job to do. A shed load of how to's all over youtube.
 

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Looking again at the pictures of your ecu circuit board i can 100% say it was fuc%ed, the corrosion damage was very bad, you also need to be aware that this is a Multi Layer board so there will be unrepairable damage to the board that you cant see,
Your egr stuck open, its a very common fault when the engine/car has been stood for a long period of time, on first ignition the egr will do its stop to stop sweep and get stuck, see it all the time from car sales, you can free it off if you remove the egr motor and work the valve in and out while spraying with lube.
 
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