2004 vogue 4.4L V8 230,000km
I just wanted to know is it possible to remove the vanos solenoids and get the cleaned? or will this cause problems? the oil filter was disintegrated into a sludge literally it was coming out in thick heavy pieces, I flushed it and replaced it with a new one and new engine oil, the previous owner did not look after this car at all, I am having random stalling issues, low idle and p0011 code which never goes away no matter how many sensors I replaced

any help will be greatly appreciated thank you!