2005 F350 6L 92K miles just had FICM replaced in last month at dealership, and now seems to have a fuel pressure issue. When FICM was changed, had shop drain tank down to ensure pick-up tube had not fallen off. Sometimes truck will not start, tries but seems to be starving for fuel. Sounds like pump is not pressuring system. Also, truck seems to lunge at idle with RPMs varying from 400 to 1100 with pedal not touched. Seems to run fine down the highway. New filter/water separator installed day prior to FICM replacement. Any suggestions or assistance will be greatly appreciated.