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I think I have lost compression in the motor.
Loss of compression in an engine is a serious problem that usually results in a complete engine rebuild or replacement. Since this is a big job to diagnose, it is very important you have a certified mobile mechanic look over your Altima before any drastic moves are taken. A mechanic will be able to perform what is known as a compression and leak down test on your vehicle. This will determine if indeed your car does have low compression and if so the leak down test can tell us why this is happening.
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