Rover 75 idle problem? by Rover75nl

Wild rovers,

I have a question regarding the idle rpm of my rover 75 tourer 2.0 CDT.
When idling the rpm settles at 700-750, causing vibrations.
When i press the pedal slightly to increase the rpm to lets say 800-850, the vibrations stop.

Is there a way to set a higher idle RPM or, what is the determining instrument for the idle rpm on the engine?
Because maybe there is a dirty sensor or anything.

hope you can give me some more info on this!

Posted 30 Apr 2015, 10:36 #1 

User avatar
The idle speed is set by the engine ECU (Engine Control Unit). It uses the crank sensor but this will be working OK or the engine wouldn't run.

I don't remember seeing an idle speed adjustment on the T4 (Testbook version 4.Computer Diagnostic System), but that would be how it were adjusted if it were possible.

It may be that you have a leaky injector that the ECU can't compensate for. Whichever way, a T4 session is a good place to start, though I have to say the engines aren't that refined at idle anyway.

Posted 30 Apr 2015, 17:55 #2 

Thank you very much duncan, i will look into this

Posted 04 May 2015, 07:43 #3 

The idle speed can be adjusted via T4, I've altered it before. I can't remember the range allowed though, sorry,

Posted 04 May 2015, 11:44 #4