Hello guys, I have a BLT Fabia. I have an engine management light on and an Egr-related error saying something about the Egr exceeding upper limit or threshold, something like that. At first I thought the vacuum box was faulty so I replaced it and cleaned the Egr. The car ran without the light for some 30km, and then the light came back. What do you recommend next? Is it definitely Egr related, or could there be something else? There are no other codes, the car feels underpowered, noticeable in third gear or higher the most… thank you dor the advice.

Test whether the EGR diaphragm holds vacuum. Put a spare piece of vac hose on it, suck hard then block with tongue tip. See if it holds.

 

Not an ideal situation, but an option.

 

Thank you for the reply. If I decide to delete it, can it be mapped out? I read that it can't be mapped out on a BLT Ecu? Is that right? Could the faulty Egr cause performance issues too? 

10 minutes ago, iwcham1979 said:

Could the faulty Egr cause performance issues too? 

 

Disconnect and block the vacuum hose going to the EGR, and see if the performance issue goes away (as an experiment, not a permanent solution).

Prior to reading this, I cleared the error and disconnected the hose going to the Egr. I didn’t block it though… The car seems to drive a tad better… I mean the car is fast, it pulls from 1800rpm like crazy, it just loses a bit of breath past 3000rpm… Maybe I am imagining things, maybe it is normal? I’m gonna try plugging it with a screw and see if it makes things even better…

27 minutes ago, iwcham1979 said:

Prior to reading this, I cleared the error and disconnected the hose going to the Egr. I didn’t block it though… The car seems to drive a tad better… I mean the car is fast, it pulls from 1800rpm like crazy, it just loses a bit of breath past 3000rpm… Maybe I am imagining things, maybe it is normal? I’m gonna try plugging it with a screw and see if it makes things even better…

 

Standard turbo and map will run out of puff much past 3000 rpm, remap will sort it.

Great. So than it’s Ok performance wise. It wants to spin the wheels in third gear, but come, say 3100rpm, the acceleration is slower and kind of  naaa…   What about the Egr error? What can be causing it, and can I simply map it out on this ECU (Blt 2006) If yes, is there anything else I can try before I do that? Could something other than the Egr be causing an Egr related code? Egr is clean, vacuum box replaced (albeit with the used one) and still damn “engine management light”.

Why not test the EGR diaphragm as suggested?

10 minutes ago, iwcham1979 said:

It wants to spin the wheels in third gear, but come, say 3100rpm, the acceleration is slower and kind of  naaa…  

 

Those PD engines bring the torque in very low down, hence why it'll want to spin in third. As Sepulchrave says, they'll begin to fizzle out at around 3000ish but that can be cured with a Stage 1 map from your friendly remapping place, plus a remapped vRS will probably see something in the region of 170-175bhp peak according to other folks on here IIRC. Peak isn't the most critical however, an even range of power across the rev range is better IMO.

4 hours ago, Wino said:

Why not test the EGR diaphragm as suggested?

Sure. 

Btw guys, do you have the part number for the BLT engine Egr valve? From what I have been reading on the forum about mapping it out on a BLT…

I got the feeling it might not be a good idea…  (even though I didn’t understand much! ) And if I choose to remove it, the best way is to keep the Asv and map out the Egr, am I right? It’s not a good idea to map it out and leave it physically there, just like it was?

Some people saying you can’t clear the engine management light at all by mapping out the egr? That is kind of confusing? Can you map it out and have no MIL on the dash?

Any of the four numbers next to "Škoda part number"   on this page: EGR Valve TDI Wahler 038129637D (skoda-parts.com)

👍

And after reading many threads on the tooic  I am still a little bit confused, so I would like to clarify. Some people suggesting mappimg the EGR out on a BLT could be done only by mapping out the whole EML, which is ridiculous and unacceptable for obvious reasons! The car wouldn’t throw an EML ever again for anything, which is just unacceptable….

 

So, can I map out the EGR, leave ASV operational and have no Egr-related EML come on the dash  on a BLT engine, but have EML operational for every other posible fault?

Edited 26 November, 20214 yr by iwcham1979

2 hours ago, iwcham1979 said:

And after reading many threads on the tooic  I am still a little bit confused, so I would like to clarify. Some people suggesting mappimg the EGR out on a BLT could be done only by mapping out the whole EML, which is ridiculous and unacceptable for obvious reasons! The car wouldn’t throw an EML ever again for anything, which is just unacceptable….

 

So, can I map out the EGR, leave ASV operational and have no Egr-related EML come on the dash  on a BLT engine, but have EML operational for every other posible fault?

 

Yes.

Great