Car cranks, will not start

2010 SUZUKI SX4
115 MILES • 4 CYL • 4WD • AUTOMATIC
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JBASNA
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The car was in good running condition, parked in my driveway for about a month. when attempt to start it, the engine cranked slow due to weak battery. after fully charged the battery still couldn't start it. Here are some of what I confirmed:

1.Spark is present at all 4 newly replaced spark plugs.
2.Fuel sprays nicely out of all 4 injectors.
3.Removed the valve cover and checked marks on timing chain,both camshafts marks and crankshaft are correct.
4. compression test on cylinder 1,2,3 and 4 are: 100, 45, 50, 110.
Aug 16, 2020 at 8:23 AM
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ASEMASTER6371
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Good morning,

The compression is you issue.

You have 2 cylinders doing nothing and the other 2 are very low.

https://www.2carpros.com/articles/the-reasons-for-low-compression

You will need to remove the head and have the valves checked and the pistons checked for any damage.

https://www.2carpros.com/articles/symptoms-of-low-compression

Roy
Aug 16, 2020 at 8:40 AM
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JBASNA
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Thank you for quick reply. I understand the low compression, however, I don't understand an engine going from good running to no start and low compression while parked for a month.
Aug 16, 2020 at 8:58 AM
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ASEMASTER6371
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I understand, but with those readings it will not run anywhere near perfect. You have internal issues.

You can do a leak down test and insert shop air into each cylinder and listen for the leak for the compression.

Roy
Aug 16, 2020 at 9:03 AM