Faulty bosch 0261200284 / vw 025906022d digifant i df1

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Faulty bosch 0261200284 / vw 025906022d digifant i df1

Post by crankythecamper »

Hi All,

First time posting so hopefully I am doing this right!

I was just wondering if you could help me, I have a faulty ecu on my VW T25 Westfalia. It's a 2.1 petrol, Automatic 1986 LHD, DJ engine code.

The ecu is faulty but I can't seem to find anyone who can rebuild can you help at all?

The van won't start keeps cranking but never firing, I have a good mechanic and he has traced and tested everything back to the ecu.

I did try sending it off to AC Tronics as they advertised they could rebuild this part but they said mine had some extra components than what they were used to!!
Not sure how that is possible but that's what they said. So they said they couldn't rebuild it. But they did confirm that it was faulty.

I think maybe they were only used to earlier ones, I think the 'D' of the 025906022d means it's the later version.

I'll see if I can attached a picture of the exact part that was taken off of my van incase that helps. But it has the yellow label and has bosch 0261200284 / vw 025906022d digifant i df1 written on it.



I think I've also read that DJ engines don't normally have the 'D' at the end of the VW No ? Should I be looking for a different ecu altogether? Although van was running fine for years.

Thanks in advance for any help you can give.

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Re: Faulty bosch 0261200284 / vw 025906022d digifant i df1

Post by TONYT25T25 »

If you need to post an image it is done like this.

Image
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Re: Faulty bosch 0261200284 / vw 025906022d digifant i df1

Post by Robsey »

If it is a digifant, then it is not a DJ set up.

DJ uses a digijet.
1983 Tin Top with a poorly DF and 4 speed DT box.
1987 Electrics and a DJ engine.
Maybe one day I might get it finished

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Re: Faulty bosch 0261200284 / vw 025906022d digifant i df1

Post by crankythecamper »

Image

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Re: Faulty bosch 0261200284 / vw 025906022d digifant i df1

Post by crankythecamper »

I've read the engine code myself before! I'm 99% sure it is DJ.

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Re: Faulty bosch 0261200284 / vw 025906022d digifant i df1

Post by Aidan »

That is an MV ECU, should be fitted under the rear bench seat inside the van
MV does not have TCi ignition module or the plastic idle retard module in the engine bay and has lambda probe in the exhaust, no vacuum advance on the distributor which is the most obvious difference.
The ECUs are not interchangeable between DJ and MV, and the auto DJ has a different ECU to the manual gearbox
DJ ECU for auto is 025 906 021 E or 025 997 021 AX, still available new from VW classicparts electronic control unit (volkswagen-classic-parts.de)
none of the UK ECU companies seem to have a clue where it comes to our ECUs for the Dijijet or Digifant engines in my experience, if they can tell it has a fault they should be able to fix it, suffix D MV ECU has a removeable EPROM, so should be simple fix if they have the data, the rest is big obvious electronic components

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Re: Faulty bosch 0261200284 / vw 025906022d digifant i df1

Post by crankythecamper »

Aidan wrote: 24 Jul 2021, 18:23 That is an MV ECU, should be fitted under the rear bench seat inside the van
MV does not have TCi ignition module or the plastic idle retard module in the engine bay and has lambda probe in the exhaust, no vacuum advance on the distributor which is the most obvious difference.
The ECUs are not interchangeable between DJ and MV, and the auto DJ has a different ECU to the manual gearbox
DJ ECU for auto is 025 906 021 E or 025 997 021 AX, still available new from VW classicparts electronic control unit (volkswagen-classic-parts.de)
none of the UK ECU companies seem to have a clue where it comes to our ECUs for the Dijijet or Digifant engines in my experience, if they can tell it has a fault they should be able to fix it, suffix D MV ECU has a removeable EPROM, so should be simple fix if they have the data, the rest is big obvious electronic components
Thanks Adrain,

Well now I am a both enlightened and confused by reading this as I could have sworn my engine was DJ code. The van isn't here at the moment its at the garage other wise I'd check. 

But the photo definitely is the one that came off the van and it was under the bench seat and it did have lambda probe which was removed by a mechanic I don't use anymore, so seems like I'm wrong! But like I say I remember reading it myself! Head F!*k !!

Thanks for all the other info, I will start by finding out exactly what engine code just for my own sanity. Then follow your advice from there.

If it is MV are there different ECU's for Auto and Manual on that ?

Thanks again and I'll get report back tomorrow.
 

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Re: Faulty bosch 0261200284 / vw 025906022d digifant i df1

Post by ajsimmo »

It's perfectly feasible that a previous owner has had a DJ engine fitted to replace the original MV. The main internal difference is higher compression pistons, and (all other things being equal and correct) this should produce more power.
A DJ engine will run perfectly well with a digifant setup as it's a closed loop system and will adapt fuelling and ignition timing according to the lambda probe output...er, oh dear! Why on earth did the mechanic remove it? That'll need reinstating if it's ever to run right. Maybe that was an ECU fault too...? I'd get the wiring loom thoroughly tested before fitting a new ECU.

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Re: Faulty bosch 0261200284 / vw 025906022d digifant i df1

Post by ajsimmo »

But HOW MUCH??
Ouch. That's plus stupiduty too. Image

I'd be getting a used one, me sen.
Image

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Re: Faulty bosch 0261200284 / vw 025906022d digifant i df1

Post by Aidan »

So your van was originally a MV, as AJ says no problem running a DJ engine as an MV
MV uses same ECU for both auto and manual
where are you ? lets see if we can put you in touch with a mechanic who knows what he is doing and can read Bentley procedures

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Re: Faulty bosch 0261200284 / vw 025906022d digifant i df1

Post by crankythecamper »

So it is DJ engine code, which actually matches up to the chassis number! So not sure how that works with the engine being replaced by someone !?

Anyway back to the suspected problem like I say the van worked perfectly well for many years with many long trips across France and one even to Spain without any hiccups, pulls well etc etc, all without the lambda probe too. So that's all a bit of mystery but I'll discuss putting one back on with my current mechanic who is as far as I can tell a very good mechanic.

I reckon it's my lack of being able to convey what he's done so far to reach the conclusion that the ecu needs repairing or replacing that is not helpful here. But I'm confident he's taken all the right steps in coming to that conclusion. Just to be fair to him and all.

So I have had a couple of ecu repair companies get back to me saying they can test/repair it. They are https://www.avilec.co.uk and https://www.atpelectronics.co.uk so I think I'll start by sending it off to one of these guys and then hope they can work some magic 🤞🏼🤞🏼

Then I'll report back. Just for the record I'm in Sutton, Surrey.

Thanks again everyone, its nice to know so many knowledgeable people are on here and willing to help a brother out 👍👍
 

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Re: Faulty bosch 0261200284 / vw 025906022d digifant i df1

Post by R0B »

I have a spare 2.1 auto one here you could borrow to test if you pay the postage both ways. But if you are sure it's your ECU that's faulty there's not much point in borrowing it I suppose. (BTW it's not for sale.)
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Re: Faulty bosch 0261200284 / vw 025906022d digifant i df1

Post by Aidan »

Has your engine got a twin vacuum advance distributor and a TCi unit and idle retard control box in the engine bay ?
Does the white paper sticker say DJ engine code ?
Does the vehicle type code (on the white sticker and also on the plate under left side seat) have a letter A in the 5th position eg 253 9AS ?

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Re: Faulty bosch 0261200284 / vw 025906022d digifant i df1

Post by Epiphone »

Hi

I believe I also have an issue with the exact model described here. Most obvious ymptoms are that the Fuel pump & idle stabliser control valve do not initialise/prime before cranking the engine.

Im also looking for a replacement ECU and/or one diagnose

Thanks, Rich

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Re: Faulty bosch 0261200284 / vw 025906022d digifant i df1

Post by Smiffo »

Try the ECU Doctor.

I have never used them, but oddly I was looking at a Digijet ECU to purchase as a spare, and it had a refurbed / tested sticker on from these people.

https://www.ecutesting.com/?gclid=CjwKC ... 34QAvD_BwE
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