a weak battery will not cause an engine vibration.
Weak battery, weak starter, resistance in the battery cables, ignition timing,
Weak battery, starter going bad, or engine out of time.
Dead or weak battery?
Weak battery? Loose or corroded battery cables? Starter solenoid?
Weak battery, or weak alternator.
Weak battery.
Weak battery, or starter going bad.
It could mean weak batteries. If it gets better on starting and rev the engine, it is the battery otherwise it could be your alternator.
It will start if there is enough charge in the battery to turn the engine over. However if the alternator is weak then the battery will not be charged fully.
Weak starter drive? Broken tooth on flywheel (Ring gear) Weak battery? Weak starter solenoid?
You possibly have a loose alternator belt or the alternator is weak. Check the voltage at the battery with the engine running. It should be 13.5 ? 16 volts. Any less and the alternator is weak and needs replacing. Also make sure the connections at the battery are clean and tight.
Could be a weak battery. As you change gears you drop engine revs, which slows alternator, which decreases the current flow to the battery. If the battery is weak or in a low state of charge lights will dim accordingly.