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Discussion Starter #1
Hi,
I have been reading up on remapping and blanking EGR etc.
This weekend I went to blank off the EGR and give it a good clean out but noticed the EGR was already blanked off (not done very well) so went ahead with doing it properly buy using new gaskets and giving it a thorough clean out. This got me wondering that if a previous owner has blanked off EGR they may have remapped it too. Is there anyway of knowing if this has been done or would I have to put it on a rolling road to find out? (I have a 2.5tdi)
Cheers, Steve.
 

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This got me wondering that if a previous owner has blanked off EGR they may have remapped it too.
Why? EGR blank is a £2 job, a remap is a £300 job. The two do not correlate.
Plus if he has blanked it badly it is even less likely.
You would know if it was mapped, does it go like stink?
 

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Transporter Tuning Specialist
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Hi,
I have been reading up on remapping and blanking EGR etc.
This weekend I went to blank off the EGR and give it a good clean out but noticed the EGR was already blanked off (not done very well) so went ahead with doing it properly buy using new gaskets and giving it a thorough clean out. This got me wondering that if a previous owner has blanked off EGR they may have remapped it too. Is there anyway of knowing if this has been done or would I have to put it on a rolling road to find out? (I have a 2.5tdi)
Cheers, Steve.
Steve,

If its a Pre 2000 year model that used the MSA15 or even earlier MSA12 Engine Control Unit (ECU) you could remove the ECU and take it apart and see if the chips have been desoldered and then re soldered back on (really quite easy to tell if they have been removed)

If its 2000 year and onwards it will run the Bosch EDC15 which has a re flashable chip inside, so no physical way you can view and see its been done.

There are a few ways to see if the later ones have been done but you will need equipment.

First you could use VAG-COM and view the live data and then if you know what values you are looking at you can see if they match with a standard software.

Next and most simple for you is to take it somewhere and stick it on a rolling road, you will then have the power output the vehicle is making.

Finally you could go to a tuner and have then read the software from the ECU (if its not been software read protected) they could then check this software with an original software.

Hope this helps

Regards
Martin
PendlePerformance
 

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Discussion Starter #6
Martin (pendleperformance),
Thanks so much for your reply. Very helpful. I will check to see what ECU I have first as its a 2000 model. I did think that the best way would be to put it on a rolling road and see what output im getting, which I think I will do. If it hasn't been remapped, I will be booming it in with yourself for one, as I've heard your the best around! :)
Many thanks,
Steve.
 

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I wonder if someone had 'remapped' my 1999 2.5 ACV, the turbo boost comes in much later than I would expect for a commercial vehicle at around 2500rpm by 3500rpm it seems to be through the power curve, in 1st and second gears you don't even notice the turbo boost you do in 3rd and definitely do in 4th where it really flies along on the flat, but changing up gears there definate flat spot before the revs build enough to get some boost..........is this normal for a 2.5 ACV? :*

..I did wonder reads threads about knackered N75 valves and MAF's but the turbo does seem to work okay it's just there is a lot of lag, on a heavy van it does make is a bit of a pig to drive around urban areas :(
 

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I wonder if someone had 'remapped' my 1999 2.5 ACV, the turbo boost comes in much later than I would expect for a commercial vehicle at around 2500rpm by 3500rpm it seems to be through the power curve, in 1st and second gears you don't even notice the turbo boost you do in 3rd and definitely do in 4th where it really flies along on the flat, but changing up gears there definate flat spot before the revs build enough to get some boost..........is this normal for a 2.5 ACV? :*

..I did wonder reads threads about knackered N75 valves and MAF's but the turbo does seem to work okay it's just there is a lot of lag, on a heavy van it does make is a bit of a pig to drive around urban areas :(
Could be one of many things, I've listed the most common faults below.

Pump Timing Incorrectly setup
Air Leak on the air intake side
MAF sensor faulty
Turbo Wastegate not correctly setup.

Best thing to do is go to someone who really knows what they are doing with these T4 2.5TDI engines and have them check it over, a live datalog of the system will show the problem, don't fall into the trap of fitting parts as it could end up costing you so much more this way.

Regards
Martin
PendlePerformance
 

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My 2.5 is remapped.

the boost starts at about 1800 and in third gear lasts up to at least 3000 and beyond..
my pump timing was out recently and like you say the boost started at around 2500 and kicked in rather than a smooth power surge..
 

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ahhh, thanks.....I thought summit was up, since I am more interested in reliability to more performance I assume a Main Stealer might be best if it's a case of pluging VAGCOM to see what's up? Besides, I don't know of any tuners/remappers in the SouthWest :*
 

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ahhh, thanks.....I thought summit was up, since I am more interested in reliability to more performance I assume a Main Stealer might be best if it's a case of pluging VAGCOM to see what's up? Besides, I don't know of any tuners/remappers in the SouthWest :*
We have vag com/vcds and as a Pendle performance agent we have martins knowledge and expertise to aid us, we are happy to help and are based in Torbay

Regards

Dan 07974522666
 

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ahhh, thanks.....I thought summit was up, since I am more interested in reliability to more performance I assume a Main Stealer might be best if it's a case of pluging VAGCOM to see what's up? Besides, I don't know of any tuners/remappers in the SouthWest :*
i can recommend dan at just vanz,top job and a top bloke,T:
 
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