1) Adjust the ignition timing according the specification manufacturer.2) Readjust the GAP for spark plug, with the s. manufacturer.3) See for loose , break, or burn wires, corrosion, dust, dirty, vibration, solenoid defective, relais, starter, alternator, battery system. Look for diagrams for troubleshooting. GOD Bless you.
You can connect remote start switch, side +to the battery, and the other side to the terminal solenoid, must be RUN,and isolate and fix it according your logic.