What would make a 1993 j30 not pick up speed?

A 1993 Infiniti J30 may not pick up speed due to several potential issues, including a malfunctioning throttle position sensor, a clogged fuel filter, or a failing fuel pump, which can restrict fuel flow. Additionally, problems with the transmission, such as low fluid levels or internal failure, could hinder acceleration. Another possibility could be a faulty mass airflow sensor affecting engine performance. Regular maintenance and diagnostics can help identify the specific cause.