I had a hard start problem and changed out entire fuel pump system with no success. I was checking all the sensors on the top of head on the intake side and found a vacumn sensor with two male nipples coming out of the top. One of the nipples was cracked enough that it came off in my hand with the hose still attached to it. I hooked both vacumn lines into the single nipple that was still attached to the sensor with a splitter and sealed of the hole that was left in the sensor with clear rtv sealant and allowed it to cure overnight. My car has cranked like it was brand new every since then, no adding pedal, no tapping of pedal. I do not touch pedal, to crank it, on purpose just to see if it will keep doing what it is supposed to do. And it has so far. After closer inspection of that particular sensor I found the letters "CARB" imprinted on the top of the sensor beside the hole where the one nipple had broken off. Makes sense huh!!!! Try it and see. One little crack can drive you nuts. Good Luck!!!!!!!!!!!!!!!!!
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