Help! Revs dropping and shuddering ?

This is probably a ridiculous question, but how can the revs drop off that sharply if the car is staying at a fairly constant speed ?

Surely the momentum of the car would keep the RPM at roughly the same speed and you would just feel a loss of power ? Unless of course you dipped the clutch...
 
Was it wet on the way to work but dry on the way home? Might be water getting into ignition components?
 
DiscoKandy said:
This is probably a ridiculous question, but how can the revs drop down that sharply if the car is staying at a fairly constant speed ?

Surely the momentum of the car would keep the RPM at roughly the same speed and you would just feel a loss of power ? Unless of course you dipped the clutch...
Click to expand...

They can't, it's losing the rpm signal from the crank sensor, hence 0 rpm on the tach and no power. ECU can't work without an rpm signal.
 
Same here

DiscoKandy said:
This is probably a ridiculous question, but how can the revs drop off that sharply if the car is staying at a fairly constant speed ?

Surely the momentum of the car would keep the RPM at roughly the same speed and you would just feel a loss of power ? Unless of course you dipped the clutch...
Click to expand...

The rpm gauge must be electrical and not gear driven.
It drops too fast - you would be through the windscreen or the car would stop dead.
Electrical problem ftw!
 
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