L Suspension Problem - CITROEN XM Internet Reference

3.0 Litre Cars

114 3.0L suspension problem

114 3.0L suspension problem
I own a 1989 citroen xm, 3.0 L petrol.I have a problem with the engine. I took it to a citroen dealer and
did a complete tune up. They tested the car's Computer and didn't find any faults in the system.The
problem still persists.My problem is that while i am driving the car ,especially when i'm in traffic the car
starts bucking back and forth.In order to stop it from doing that I have to press the clutch in and release
it. It happens very often.Any advise would be greatly appreciated. Thank you.
======
I had the same problem with my 1991 V6.24. Citroen replaced the
so called "Drosselklappen-Potentiometer" and all was fine.
Don't blame me for that ugly german terminus-technicus, but I
really don't know the English word for that.
Hope that helps (probably you need a special dictionary too :-)))
--
Harald Krake (mailto:harald@krake.de)
======
Hmmmm... this sounds a bit like a long standing problem with my 24v. in my case, the throttle response
can be unpredictable at small throttle openings, with the car often jerking forwards when it should be
cruising. This fault has baffled *many* "specialists". Did this happen with both of you?
Could the Drosselklappen-Potentiometer be the throttle potentiometer? Or is that a little too obvious?
I anyone else has any hints for thif fault, I would be very pleased to hear from them as I really want my
car back!
Regards
Richard Williamson
======
You're right! My dictionary says that a throttle is a "Drosselklappe". Never thought that this is so easy to
translate...
======
Well, I own a '91 XM V6 with 190.000 km since a few weeks. I noticed the same. Specially while driving
below 10 kmh in a traffic jam. I think it is caused by the grown tolerance in the gearbox and the driven ax.
It seems to me that the gearbox and ax are elastic, winded up - power released - acceleration - elastic
rubber has lost it's energy -> deceleration - engine winds up the rubber band - reaction driver!
My BMW K100 motorcycle has some tolerance in the gearbox and it behaves sometimes more or less
the same.
174 Citroen XM Internet Reference Version 1.0
3/3/99