Ok.
In my sl2, I have a fresh rebuild, maybe 3000 miles. Using my WBo2 guage the car wants to go lean at idle and at cruising throttle. Enough that the car stumbles when the engine is all warmed up. When you hit the gas at idle speed the car hesitates before it takes off. Looking at my vacuum gauge, the needle reads about 21-22 psi vacuum and fluctuated rapidly about 2 psi up and down. What do you guys think the problem could be?
New -plugs/wires, map sensor, re manufactured head fuel pressure regulator is set at 44psi EGR valve is removed and using a block off plate