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Low Compression in 2 cylinders

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Old Mar 7, 2012 | 05:59 PM
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From: Grafton, MA
Low Compression in 2 cylinders

After recently fixing my starting issue(me being a total idiot mixing up the coil wires)

I did a compression test,

From left to right looking down on the motor...

1(150psi) 2(90psi) 3(90psi) 4(150psi)


What would cause this sort of compression issue? Stuck valve? Head gasket? Rings?

Hoping to have it leak down tested to further my troubleshooting, just hoping for ideas!

Thanks in advance
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Old Mar 7, 2012 | 06:56 PM
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From: Springfield MO
id say head gasket leak between the two cylinders that have low compression
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Old Mar 8, 2012 | 04:22 AM
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From: cow tippin
it does sounds like a head gasket problem. any coolant/oil mixing? the leak down test will definitely give you a better answer.
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Old Mar 8, 2012 | 07:02 AM
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From: Grafton, MA
Originally Posted by EVO8STI
id say head gasket leak between the two cylinders that have low compression
Alright cool, at least more then one person agrees on this then just me thank you!

Originally Posted by xxthayxx
it does sounds like a head gasket problem. any coolant/oil mixing? the leak down test will definitely give you a better answer.
There is no leaking of coolant/oil. I need to find someone who can do the test, since I dont have a compressor But thanks for your response
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Old Mar 8, 2012 | 07:18 AM
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From: COLORADO
I vote for head gasket as well. Do a leakdown when you can. Good luck.

Aaron
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Old Mar 8, 2012 | 09:35 AM
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do a wet test, put some oil and then check compression. if this doesnt increase compression then its HG
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Old Mar 8, 2012 | 12:26 PM
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sounds like a head gasket. Leak down test
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