Hi,
I have a 1999 Transit van with a 2.5 turbo Diesel engine. On 3 occasions now for no apparent reason it has started to rev uncontrollably and produce huge clouds of white smoke that smells terrible(oil burning). If I didn't put in in gear and stall the motor I am sure it would it would rev off the scale.
Yesterday it did it a day after a long trip. Started ok cold and went into over revving and smoke clouds like you can't believe after 2kms down the road. Very embarrassing when it does it in a busy street. One other time is did it about 2 kms from home in a friends driveway (from a cold start)and the other time coming onto the motorway from an on ramp (about 2kms after cold start)and I could manage the over revving on the motorway. These events are months apart.
After it has its manic over rev and I am brave enough to start it, it will be a little smokey and behave like nothing has happened. Mechanic friend is baffled, we don't think its the turbo as its random when it does it and doesn't smoke between episodes. Doesn't use any oil on a trip, doesn't drip oil.
I have managed to control stall it(so far) but concerned any one else driving it will not be able to do this.
Appreciate your help.
Thanks