I have just put a street ported engine and racing beat exhaust (header back) on my 1988 RX7. Before the original engine seals failed, everything worked fine. Now when the car warms up, there are three things that it does not want to do. 1)It does not want to idle 2)The power brakes do not seem to have any assist 3) The automatic trans does not want to shift into 3rd. I have looked for vaccuum leaks and have not found any. What else can cause these symptoms?