My vehicle have quit twice while driving, its just stalls and will not start back.

What is your question?

Recently, I have had timing belt, all other belts, water pumb, oil filter, Sensor cleaned,fuel filter changed,all done to this vehicle. Since then, it has the tendency to not start especially if the air has been on. It also tends to stall when put in forward or backward motion. But it was running ok once it gets going until yesterday it quit on me while driving. It did the same thing today, just quit on me driving down the highway. Do you have any suggestions?