looking for experts to help determine if p0090 and p0087 is another part of the domino issues caused by a bad job of the timing chain replacement. Had full timing chain kit replacement, thermostat,power steering pump, oil pump replaced in February which took them 3 weeks. Returned in March with timing issues and they replaced vvt, returned in June with timing issues and they replaced timing actuators. Today check engine light with Fuel pressure codes. Im thinking that the crap job they did on the timing chain has caused a domino effect from of the chain rubbing on the oil jet to failed fuel pressure regulator. Is there any way to prove this is all related to the bad timing chain replacement?