It all depends on how bad is the moneyshift. we have do compression-test, leak test to find out the initial symptoms & take it deep from there..One very obvious worst symptom would be bad idling & CEL light.

I did the same thing , when I got my AP1 in the early days.. & I had bad idling & occasional CEL light. I checked the coils & injectors both are fine. I also checked it for bent values & actually sent the head for inspection. I ended up doing a value adjustment, since I opened the head . Once I mounted everything.. this thing never showed up again.. so in my case even though I have CEL light, we could not source it out..