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Why is my car having trouble starting with a new battery?

I have had a new battery fitted in the car, a Vauxhall Corsa - alternator and started motor checked but the car is still having trouble starting.

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Linda, what year is it and what engine size does it have? When you say it has trouble starting, does it turn over but does not start? Is it slow turning over ? Do your lights go dim when you try to start it?

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Not sure what year your Corsa is, but I would think it does have a On Board Diagnostics. If you can, get it hooked up to an analyzer to see which codes it is giving you. That would definitely narrow it down. Disregarding engine size, the things to check are airflow sensor, crankshaft sensor, idle speed control valve and exhaust gas recirculation valve. Any of those can cause you considerable grief. Check the air filter and vacuum connections for any leaks and that they are on. Poor starting on those engines is often caused by idle speed control valve and most definitely the crankshaft sensor. As you can see there are numerous issues that could cause this. Of Course you also want to make sure that your fuel pump and fuel filter are working or replaced. You can download a Repair Manual for your vehicle from here. Hope this helps and clarifies it a bit. Good luck.

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I had this problem. I discovered that the nut which clamped the wiring harness to the alternator was loose which caused intermittent connection from the alternator to the car's electrical system including the battery. Tightening the nut down fixed the problem.

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you should check for voltage drop on battery leads (measure at battery post not clamp) as I have had this in the job I do.

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I had a problem with this and tried every solution on all the forums, the answer was none of the suggestions. Eventually even though the engine was turning over, i found out a new starter motor cured it. The old knackered starter motor although seeming to turn the engine fast enough, just wasn't turning it fast enough to achieve the high compression needed. Also cause it wasn't turning fast enough it gave the engine fault code suggesting the crankshaft sensor was no good. The crankshaft sensor was OK but wasn't giving the right number of pulses cause the engine wasn't turning fast enough.

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Linda 40 님은 대단히 고마워 할 것입니다.
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