Revs increasing with clutch pedal

Not something I get with mine

Sounds like your foot is pushing the accelerator.........."riding the clutch"

Spot on Big Jason modern anti stall device.

ECU regulates fuel delivery bytaking into account a number offactors from the engine and the surroundings - such as inlet air pressure andtemperature, intake air flow, coolant temperature and the throttle pedal position . The ECU improves drivability by taking inputs from the clutch, brake and throttle pedal to smooth out gear changes and reduce driveline shunt.

The clutch hasn't even bitten as it increases. Subtle, but off-putting as instinctively you should hear the revs drop as you get ready on the accelerator.

It's not something I'm doing, I know how cars should respond when pulling away. Just another quirk of modern diesels that should never have been messed with.

Also on modern petrols

HoneyMonster said:

ECU regulates fuel delivery bytaking into account a number offactors from the engine and the surroundings - such as inlet air pressure andtemperature, intake air flow, coolant temperature and the throttle pedal position . The ECU improves drivability by taking inputs from the clutch, brake and throttle pedal to smooth out gear changes and reduce driveline shunt.

Click to expand...

Cool, but that extra 100 rpm will put slightly more stress on clutch as it's higher than it would have been.


I don't believe the anti stall thing as I've never (ever!) stalled a diesel before this one. Maybe if they got the gear ratios right there would be need for these small subtle fixes. It does lack low down torque for the gear ratios.

That write up was taken for generic ECUs not specifically GM, but same principles apply to most modern vehicles. As found similar references on GM, VAG ,Toyota, Landrover. So it just seems to be way that modern ecus are going both petrol and diesel.

Seems pointless as it's never been a problem in any other car I've owned