ive replaced the rear brake pipes on my e53 4.6 v8 x5 as they failed MOT, ive found major problem bleeding the fluid from the caliper, the fluid will only trickle out rather than pressurised. there are no kinks or tight bends in the pipes and when i removed the connector on the chassis leg brake pipe the fluid pressure is the same.
is there a certain way of bleeding these systems? ive tried manually bleeding it, pressure bleeding and reverse bleeding (from the caliper back)
is there a pressure sensor on the abs pump that may be affecting this?
thanks in advance guys