Hmmmm ok I know it stating the obvious but it would definately seem to do it when the engine is underload. It may well me another sensor/actuator that is faulty. Does it do it under any particular cambers? Does the weather effect it ie the wet?

It can only be very intermittant and certainly not anything major or else the ECM would flag up a diagnostic code for the engineers to read. I am certainly not familiar with sytems used by MGR so I cant help thats much

I would put my bet on it being a faulty sensor. How old is the car?

 

Hi Vitesse,

I agree it would seem to be related to the engine being under load, but i'm not sure what kind of load. One evening I had to accelerate away from a roundabout and had the gearbox(auto) in sport mode, with heavy acceleration the needle rapidly hit the red line before the gearbox changed up, no warning light - 5 min's down the road cruising at 30mph along some country roads the light flicked on under very gentle acceleration with the gearbox no longer in sport mode.

I wondered if the 75's had the little led flashing panel under the passenger footwell carpet like older model rovers, that tell you the ECU status?

The car is 2 1/2 years old, 33k miles on it, the MIL only started to come on over xmas, maybe the cold/wet weather has something to do with it.


Salop75

 

Hi Vitesse,

I agree it would seem to be related to the engine being under load, but i'm not sure what kind of load. One evening I had to accelerate away from a roundabout and had the gearbox(auto) in sport mode, with heavy acceleration the needle rapidly hit the red line before the gearbox changed up, no warning light - 5 min's down the road cruising at 30mph along some country roads the light flicked on under very gentle acceleration with the gearbox no longer in sport mode.

I wondered if the 75's had the little led flashing panel under the passenger footwell carpet like older model rovers, that tell you the ECU status?

The car is 2 1/2 years old, 33k miles on it, the MIL only started to come on over xmas, maybe the cold/wet weather has something to do with it.


Salop75

Errr yes "older" not "old Man" lets state :lol:

Yes you are correct, the old honda powered 800's had the LED panel but they are long gone! Im afraid unless you have a hand held diagnostic unit or laptop, nobody will be going near your car!

Sometimes sensors can fail after a year old and your millage but its not common, but at least its still under warrenty

I would just incist that if they cannot find anything with the car stationary, that they take the car for a run and just state to them when it does it. I would seem that it effects only partial throttle, so maybe another sensor in the induction system...... a throttle position switch or mass airflow sensor. I don't know what Rover engines have fitted to them and I am purely having a guess here

 

Took that car up to my main dealer yesterday, they identified the airflow sensor but had to order it overnight. Have just picked the car up and everything seems fine

Salop75

 

Took that car up to my main dealer yesterday, they identified the airflow sensor but had to order it overnight. Have just picked the car up and everything seems fine

Salop75

Ah yes ... glad its all sorted!

Well one of my 3 guess's was right!

 

This used to come up on my mates 1.6 rover coupe but it actually stated in the manual that it could just be a sensor gone and take it to a dealer! Or also says could be a problem with the CAT.

 

Errr yes "older" not "old Man" lets state :lol:

You are much too modest Dan :shake: Old man sounds eminently suitable.......:lol:

Regards

Mike