I just built an engine for my Foxbody. It’s now bored 30 over. I put everything back together. The idle surges but does not feel to be a vacuum leak. The car starts fine when cold but does not start when its warmed up and I have to keep pressing the gas pedal and crank for it to start. And then it starts but very rough start up. I checked for codes and got 32, 67, 81 & 82. Car has no cats.