In June 1968, an agreement was reached where the state Transportation Assistance Authority would pay $2 million and Penn Central would pay $2.5 million for the 11 Metroliners for Harrisburg service. On July 14, a 4-car train was tested on the line, with several demonstration runs for officials on August 21. On February 25, 1970, the cars intended for Harrisburg service completed their performance testing. Penn Central refused to accept the cars, citing numerous technical issues with the cars and their general unsuitability for the service. They had worse acceleration than the Silverliners already in service, tended to overheat when making numerous closely spaced stops, and had difficulty climbing the grade out of Suburban Station. Additionally, the corridor lacked high-level platforms to effectively use the cars, and 15 substations would require expensive modifications. The 11 cars were unused for some time before Penn Central ultimately decided to lease the cars for use on the core New York–Washington service. They were moved back to the Budd plant for modifications in April. In July 1970, the state authorized $100,000 to upgrade existing Silverliners for the Harrisburg service instead.