NJ Transit and Amtrak continued to disagree about the cause of Friday morning’s rail service problems to and from New York, with NJ Transit officials saying a commuter train that Amtrak blamed for breaking down passed inspection in Newark. The disagreement comes after commuters have endured five days of service interruptions due to infrastructure and train problems on the nation’s busiest railroad. It has halted service numerous times as a heat wave played havoc with electrical systems and trains. Lawmakers questioned why Amtrak hasn’t used federal infrastructure law money to fix these issues …