So I know this subject is old to just about everyone here, but here goes. I have an injector at -6 in park and it goes to -4.5 in drive. Now I know usually the injector would get higher in drive such as go to -7 or whatever and when I checked it it did do that, but when I checked it again is when it went to 4.5. So whats going on? why would it become more negative on one check then become less negative on another check. In park its consistently -5. I know I need to get it in for another set, but I still want to know why it would act like this. Any help is appreciated.