id rather not do a EGR delete , i will for testing purposes to see if its my EGR system or not , but emissions testing here is pretty strict so i won`t delete it. But i will try the above mentioned things and see if i get any change.
The issue is far to random for me to wrap my mind around it. in the past when a vaccum hose has a break it in or it is collapsed it tends to stay that way and have a constant. However due to the brake hardening up i still go back to the vaccum as its all vaccum based.