no before i did the plenum pull it was back fireing at idle to were it was shooting small flames and then a few days later the only was i was to keep it running was to always pushing the gas.so i figured it could be the fuel injectors cuz they never been changed before. so i changed out the fuel injectors and got new fuel hoses and a new fuel pressure regulator. now that everything is back together theres only 1 vacuum that i cant find where it goes to is the one on the balance tube on driver side. but i plugged it up for now. and yes the only way my car runs now is without the maf sensor but it only revs up to 2 grand. as soon as i plug the maf back in the car dies instally