Car starting problem

my lanos is screwing up now! can anyone tell me what it is. Every time i turn the key the starter motor jams and finally it starts and runs all rough!

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How to Diagnose Car Battery and Starter Problems
YUMMM Fried Apple Pie Tacos - Learn how to make them here: Watch more How to Make Simple Car Repairs videos: r-Problems Use these tips to diagnose your car's battery and starter problems. Step 1: Turn on your ignition Turn on your ignition if your car engine won't turn over. Listen carefully to any sound produced. Step 2: Consider a dead battery Consider the possibility of a dead battery. If trying to start the engine only produces a "click" sound, this may be the case. If you left your car lights on the night before, the battery could have gone dead, and you'll need to have the battery jump-started. If the battery is very old you may have to get a new one. Tip Car batteries typically only last 3 to 5 years. Step 3: Consider a possible alternator problem Consider a possible alternator problem if turning on the ignition produces a whining sound, but you have a newer battery. If the alternator is bad, it will not charge the battery when you drive the car. You can use jumper cables and another battery to start the car, but the same problem will occur again. Have the alternator checked and replaced if necessary. Step 4: Consider a possible starter problem Consider a possible starter problem. If you hear a click when you turn on the ignition and the problem is not due to your battery, the starter's solenoid may have a weak spot inside. If so, the starter will not be able to produce enough current to start your engine, and you will have to have it replaced. Step 5: Visit a mechanic Visit a mechanic if you're having trouble determining the sound your car is making. It's always better to be safe than sorry! Did You Know? The Oxford Electric Bell, a battery-powered bell at the University of Oxford in England, has been ringing almost continuously since 1840.

Starter Motor Troubleshooting Tips DIY - How to diagnose starter problems
Video to show how to trouble shoot a starter motor when it won't start the car. Provides a procedure to follow to diagnose starter motor problems. One measurement I didn't have time to add was to verify the solenoid operation by measuring the voltage drop across it while triggered. When you turn the key to START and you get 12V on the trigger wire, put one volt meter probe on the big silver solenoid battery cable nut . Put the other volt meter probe on the lower black solenoid nut attached to the braided wire going to the motor. When triggered, you should see less than 0.1V between the two cable nuts on the solenoid. If you measure more than this then the solenoid electrical contacts inside are pitted or worn out and this is preventing enough current from flowing in the starter to make strong enough torque to turn the engine. Instead of turning the engine you will only hear a clicking noise when turning the key. Battery Voltage - %Charged 12.6V 100% 12.4V 75% 12.2V 50% Allowable Voltage Drop in the starter circuit 0.2V from battery +ve lug to starter solenoid silver nut. 0.1V from solenoid sliver nut to braided strap on starter body 0.2V from battery -ve lug to starter body metal.