check fuel pressure,30 [p.s.i] or above at idle speed.Check for an increment in pressure(+/-)32/45[p.s.i]at part or full throttle.If pressure readings are lower,check for clogged fuel filter,bad fuel pump,leakage at fuel pump hanger or faulty fuel pressure regulator.
howtomendit.com for free repair help, information and advice.
Try fixfault.com to fix cars.