Peugeot 2.0 Hdi 90...interesting ECU question. Rev limiter?

[Cheesypeas7]

The initial message was deleted from this topic on 26 December 2025 at 09:20

[finlo]

It sounds like that test is for petrol engines, I doubt many diesels would rev to 5k?

[paul_c123]

It is very common for engines/spec to differ for Switzerland, yours being a non-Swiss may never pass their emissions test procedure. Whether there is an exemption or other test for imports, I don't know.

[stevieturbo]

It's a "normal" diesel MOT test for emissions/smoke.

Yet I've never had one person explain to me any logic behind revving the st out of an engine, off load, in a way that in the vehicles entire operational life it would never be revved to by a normal sane person.

Despite it being part of a UK and further afield MOT, pretty sure most don't actually do it due to the insanity.

Some vehicles may have different limits when it knows the vehicle is stationary, or in neutral lower than what might be it's normal limited though as they have more control options than an old mechanical diesel where it would literally rev to it's max the governor allowed.

But as others have said, maybe a Swiss vehicle may have a different programming to suit Swiss regs. Maybe get a Swiss remap company to flash something in

[stevieturbo]

Cheesypeas7 said:

The fact that is hits this 4750 limit consistently point to something else???

It just shows it's doing exactly what Peugeot have programmed it to do, assuming how they are getting their rpm reading on their equipment is correct.

Only Peugeot would know