Hi, I recently replaced the vanos seals on my m52tub28 and have been getting a "exhaust vanos end position not reached" code. I decided to manually activate the vanos solenoids using an external battery. Both the intake and exhaust solenoids have an audible click when activated. BUT the engine only reacts to the intake solenoid (it drops rpm and starts stalling), while activating the exhaust solenoid does nothing. 

Now the question - is this normal? Could the oil channel leading to the exhaust vanos be blocked, not receiving any pressure? I thoroughly cleaned the solenoid and piston/spring and they move freely.
