Thanks for the help. I shall do some checking when I get a chance. Just to be sure, I have to remove the HPOP to check the o-ring correct or just the top half?
injector o-rings
pull and cap 1 line from the pump to the head. fill res let it sit the side that leaks down has a bad o-ring or more if you find a leak might as well do all otherwise you will have to do them later anyway,
I'll give that a try as well. Thanks. I have a hard time thinking o-rings as I just put all new ones in when I did my injectors less than a year ago, but i guess you never know.
if the o-rings didn't seat quite right then they can develop a leak over time, easy to do if you did not put enough lube on the o-rings when you slid the injectors in.