SDI Respiration: Support & Solutions

Hey everyone,

I really love my SDI because it's actually the epitome of reliability, well, more like a car that's reliable.

I was even able to extract a bit more power and reduce fuel consumption by adjusting the throttle cable (which was originally designed to allow for such adjustments), specifically by minimizing the pedal travel and lowering the idle speed.

However, if I drive at maximum speed all the time, it consumes a lot of fuel, and I know that TDIs generally don't do well with that kind of driving.

Therefore, I would conclude that he is simply not getting enough air, specifically oxygen, to properly process everything, and that is why he is wasting so much.

Therefore, my question is, how can I help him breathe?

Okay, what immediately came to mind is using nitrous oxide (NOS) in the intake path between the air filter and the engine, ideally close to the engine where the air is being drawn in. As you know, NOS primarily acts as an oxygen donor. However, the cost is a significant drawback.

And the air filter – you always read different things here in the forum about it. Definitely not an open filter; it has to be approved for road use. But are the approved, suitable air filters recommended? By 'suitable,' I mean for a Skoda Felicia LX 1.9D.

Aso, und kommt mir jetzt bittte nich mit Turbo raufschrauben, dazu is dann doch ein bißchen wenig Elektronik vorhanden. Und der Kompressor is auch nich mein Weg. Both are too expensive.

I believe that a lot can be achieved with small, subtle changes.

Best regards, BigB.

Hello,

Okay, I think it's a rumor that TDI engines start consuming more fuel at full throttle. Mine, according to the MFA (Multi Function Display), consumes about 16 liters at its maximum speed. Based on your assumption that your SDI isn't getting enough air, you're probably wrong, because if that were the case, it would be emitting clouds of black smoke, which it apparently isn't.

1.9D ... Throttle cable...

Are you sure you have an SDI and not a bubble chamber SD?

Please provide us with the engine code, which can be found in the service booklet. It might look something like "AEY" or similar.

m;

Sure, here's the translation:

"Anything else?"

When driven at full throttle, a TDI engine consumes significantly more fuel than an SDI engine. I have experience with both.

m;

Well, I wonder where that comes from?
I once managed to drive from Berlin to Hamburg with my old Seat, using up a whole tank of fuel. And that wasn't even an SDI or TDI model.

SDI?

Probably not much...

Yes.

Okay, just to give you some numbers, I'm getting 8 liters per 100 kilometers at a constant top speed, which is 170 km/h. For comparison, my friend has a Golf 3 1.9 TDI with 90 horsepower, and he's getting better fuel economy, using about a liter less. That's why I'm having these thoughts.

'Yes, figuring out exactly what it is isn't as easy as it seems. It's a Skoda Felicia I LX 1.9D, but it has the front end of a Felicia II because the previous owner bumped into a wall, never mind that. The Felicia I models have '1.9D' on them, while the Felicia II models have '1.9SDI', but both have the typical 47 kW / 64 horsepower, which is still characteristic of that engine.'

'Regarding the engine identification plate, yes, so on the plate in the front of the engine bay it says 'ABE', although I don't think this is related to a job creation program, and in the manual, the engine code is not specified, which is great.'

What I can also add is that I can connect to the naturally aspirated diesel engine control unit using VAG-Com, while it doesn't work for other vehicles.

Address 25
Protocol: KW1281
Controller: 1H0 953 257 B
Component: IMMO VWZ3Z0T0690153 V00
Coding: 02400
Shop #: WSC 00000

Address 41
Protocol: KW1281
Controller: 028 906 125
Component: Diesel engine, naturally aspirated, V03.

Yes, I hope that clarifies things a bit more.

Best regards, BigB.

The 64 horsepower model was available as both an SD and an SDI version.

I can only check later whether "ABE" is the engine identification code.

m;

There should still be a sticker in the trunk that shows the engine code.

If you have a control unit, you probably have an SDI.

That's right.

I had stopped reading about the immobilizer .

Sorry.
m;

Okay, I'm going to take apart my trunk now, give me a few minutes.

Best regards, BigB.

Okay, I took the trunk apart to find the same sticker that's in the manual, but it also didn't have any engine identification information.

Oh, sh...t!

Best regards, BigB.

MKB can only be AEF and is not SDI.
The AEF is also the only diesel engine listed for the Felicia/facelift models.

Best regards, Rudi.

Hello!

Quote:

However, if I drive at vmax all the time now, it has a quite high fuel consumption, and I know that TDIs don't usually consume that much.

It's unclear what you mean by the word "da" in the context of "TDI."
Is it your car's top speed or the top speed of a specific model (like a TDI)?

Quote:

8 liters at a constant maximum speed, which, by the way, is 170

.

Your car doesn't seem to have any problems, but it might be interesting.
to figure out which engine you have and which [model/version] it is.
Because he got into the car.

Greetings,
Klaus.

@Rudi: Well, that's the problem, it's not a facelift from the factory.

As described in the text above, the front end is new, and since they were already doing a timing belt replacement, you can probably guess that they also did whatever else was needed in that area, or perhaps even some work on the engine.

That's my problem, this uncertainty.

@Klausel: Yes, as I mentioned above, TDIs are engines that, when driven aggressively, consume less fuel and, when they consume a lot of fuel, they tend to drive much faster.

So, the general consensus seems to be that these are actually normal values, but I find them too high and would prefer them to be lower, or perhaps a higher maximum speed when riding.

Best regards, BigB.