I have a 88 4runner with a 3vze. I just changed the head gaskets. Everything seemed 2b fine when I stated it up 2 set the timing. Its sounded good and had good vacuum. Once she got 2 operating temp. the vacuum dropped to 10in. and idles kinda rough. She doesnt stall and I can still drive her but at idle she scares me. theres not dtc's either. I went through all the electrical connections and everything is hooked up. Im stumped. Can anyone