hey all,
I have an odd problem, and I have done some searching, but to no avail. I have noticed that in the morning, (it seems to be only when it is below freezing), When I pull out of the driveway, it feels like there is no rear suspension. I mean, if I see a pothole I make sure to steer clear, otherwise I feel like I am going to knock the teeth out of my head. The only thing I can think of is that there is some moisture in a line somewhere...

It seems that once the sun warms it up it tends to loosen up a little, anyone have any ideas. Also, I should point out that as of last night, there were no codes present.

alex

Do you notice if the car is sitting higher or lower than normal?
You may have a problem with the ELC (electronic level control).
To check the lines and compressor have a look on the passenger side rear area.
Its a bit tough to access but you'll be able to see if its iced up or not.

my car rides very rough in the cold mornings aswell

Just how rough is it? It is normal for these (or any and all) cars to ride harder in cold weather just because the oil inside the shocks and struts are colder and thicker fluids then when warm.

Shocks and struts heat up as the vehicle is driven. The movement of the suspension generates heat and warms the fluid inside the shocks and struts. This heat changes the way the suspention opperates.

fatcat, i understand wat you are saying, but I have had plenty of cars that have not ridden this hard in the mornings

Definately take a look at where the level of the car is. say high or low versus later on.

If the ELC (air suspension) had a leak..it could let the suspension bottom out a bit and possibly cause a hard ride.

also keep in mind that the rear suspension has ambient air pumped into it with the ELC system, this wil cause tehre to ber humidity and therfore ice will form inside of the rear shocks.

That'* exactly what I think the problem is as well. On the exact same days, the Bonneville will ride like a lumber truck with no suspension whereas my car isn't. (yet.) We took it to the dealer and they couldn't figure it out. Go figure. Anyways, I've driven it with the fuse out of the ELC, and no air lines, and it still rode very very rough. Even after 10+ miles of driving, it did not loosen up. If it'* above 20* or so, it doesn't seem to have the problem. My only explanation is that over time the airshocks build up moisture/water in them from the ELC pump. There'* no way the pump can filter out all moisture in the air so naturally it builds up in the shock. Maybe if there was a way to safely heat up the shock with the air tube off some of the water could be evaporated out?