I just finished putting in a rebuilt 3.0 in my 88 4runner.I also put downey headders on it. Yesterday I started it up for the seconed time. i drove it about a mile (it was hella loud since I havent connected my headders up to the exhaust system yet)This moning I start it up and it was running poorly, it wouldnt stay at idle and had no power. now it hardly runs at all. my buddy thinks that one of the intake gaskets has a leak in it. Any ideas?