what is the best way to repair an no engine start

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Answered by: vic, An Expert in the Auto Repair - General Category
In order to trouble shoot the engine start system, it is best to begin with the most obvious possibilities. First and foremost you should check the cars battery.

This can easily be done with a voltmeter. A 12 volt battery should read 12.5 volts or more, a reading of 11.5 or less will indicate a battery incapable of engaging the engine starter motor. You should have the battery charged or replaced. When either charging or replacing the battery, it is also a good time to clean the

battery terminals and also the cable ends. Baking soda is an excellent cleaner and will also neutralize any battery acid. As a safety consideration thisis a good time to wear safety glasses. After verifying a good battery and the next step would be to check the engine starter. A quick check is a light jumper wire to the starter solenoid. This is a good time to practice safety by ensuring that the transmission is in neutral. Use a jumper wire from the positive battery post to the starter solenoid. If the solenoid clicks and the starter motor does not engage, this would indicate a faulty starter, which needs to be replaced. If the solenoid does not click , then replace this unit. These tests are checks for the main components only and do not check for faulty wiring and ignition switches. This is a brief synopis of the no engine start electrical system. If there is no resolve from doing the initial test, then further troubleshooting should be done to the peripheral parts. Verify that the neutral start switch is working. This is a safety switch most often located on an automatic transmisssion. It prevents the car from being started while in gear. After verifying that it works check the key ignition switch. Key on and in the start position should engage the starter solenoid. If this does not happen,check the wire from the key switch to the solenoid. Best to use a multimeter or 12 volt test light to verify voltage to the solenoid. The most common causes for no engine start electrical system is one of poor battery connections. Or often the solenoid which connects the battery to the engine starter is faulty due to poor internal contacts. Th engine starter requires high amperage to turn the auto engine over fast enough to start This high electrical amperage will often result in corroded contacts and melted contacts. When replacing engine parts always check for further damage to other parts of the system. For example a faulty battery may indicate a persistent electrical drain on the system. A starter with worn gear teeth may indicate the wrong stater or at least further wear to the engine ring gear. If this is the case, one sign would be noisy starter engagement, a chatter or grinding sound.

When replacing automotive parts always check for existing part numbers and use these for a replacement guide. As is often the case when buyiing, cheaper is not always the answer for an cars dependability and safety. Vic Nadurak

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