ride height dropping?

ok, here's my setup:
18inch enkei rp07's
yokohama 215/35zr/18's
eibach springs
ground control coilovers

when i raise the rear of the car with the coil overs it looks nice, sits up like an Si and that's what i want.
then after about a day or two of driving i look and it's lowered again.
here's the wierd part, the coilovers are still in the same place i locked them. any thoughts?

also i have some squeeking coming from my rear suspension, any thoughts on this?

Originally posted by RoBoDEATH
ok, here's my setup:
18inch enkei rp07's
yokohama 215/35zr/18's
eibach springs
ground control coilovers

when i raise the rear of the car with the coil overs it looks nice, sits up like an Si and that's what i want.
then after about a day or two of driving i look and it's lowered again.
here's the wierd part, the coilovers are still in the same place i locked them. any thoughts?

also i have some squeeking coming from my rear suspension, any thoughts on this?

Well how do you have Eibach springs AND Ground Contol coilovers?

When you raise the car up a bit, did you mark the coilovers with a marker or piece of tape to see if the coilover collars are moving? How tight are you tightening the allen bolt for the coilovers?

It's either that or you raised the car with an empty tank and then added gas which lowered it.

well they where on the car when i got it but the springs say "eibach ground control" and i noticed that eibach makes springs and ground control makes coil overs