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Low compression

  • Sanchezj3161
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7 years 1 month ago #28262 by Sanchezj3161
Low compression was created by Sanchezj3161
I have a 03 Nissan Sentra. I checked the compression on all cylinders but they are too low. Can you please tell me what could cause this?

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  • Tyler
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7 years 1 month ago - 7 years 1 month ago #28267 by Tyler
Replied by Tyler on topic Low compression
Which engine is in your Sentra, specifically?

Unfortunately, there's a TON of causes for uniformally low compression. Intake restriction, valve timing, fuel washed cylinders, smoked head gasket, just to name a few. Posting your compression readings would give us a better idea of what's going on. ;)

What brought you to start testing compression? No start, rough running?
Last edit: 7 years 1 month ago by Tyler.

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7 years 1 month ago #28311 by Sanchezj3161
Replied by Sanchezj3161 on topic Low compression
My compression reading are around 50 to 60 psi in all cylinders.

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7 years 1 month ago #28317 by guafa
Replied by guafa on topic Low compression
How many miles/km has your car?

Is the car running fine? Any power issue?

Do you have a normal crank? Is the battery fully charged?

It's better you describe every detail you have.

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7 years 1 month ago #28392 by Andy.MacFadyen
Replied by Andy.MacFadyen on topic Low compression
Compression tests need to be done with wide open throttle, as the compressions are even across the cylinders if the car is starting running normally with no excessive oil consumption unless you have a specific reason to suspect an issue you probably have nothing to be concerned about.
" We're trying to plug a hole in the universe, what are you doing ?. "
(Walter Bishop Fringe TV show)

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