Hyundai Repair: fuel pressure, hyundai accent, secondary ignition

Question
recently had my timing belt changed and now my car is misfiring. someone please tell how to adjust or reset the fuel pressure for my car. it is a 2002 Hyundai accent with a 1.5L engine

Answer
The fuel pressure is not adjustable.  

Why was the timing belt replaced?  Did the old one fail?  If so, it's likely that you have no or low compression on one or more cylinders due to bent valves.  

If you indeed have a misfire, you should start with checking secondary ignition components (plugs, wires, coil), and if all checks okay, perform a compression test.