Help asap!!! civic has low compression on all cylinders..why???

[rice400]

I would start out by checking your timing, maybe the timing belt jumped a few teeth

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[Matt Brandsema]

Quoted From rice400: _x000D_
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I would start out by checking your timing, maybe the timing belt jumped a few teeth

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Definitely! There isn’t much else that would effect ALL FOUR cylinders at once. I doubt it is a head gasket as that nor

[Grease Monkey]

are there any other signs of a blown head gasket?? & even if the timing skipped

[SpawnedX]

4 cylinders at once is almost exclusive timing or damage that occurred due to jumped timing. You can try to put a drop or two of oil in the cylinder and then test the compression to rule out rings.

[Mike]

I would also recheck Compression with a different compression tester.

[Mike]

jumped timing would keep your valves open longer so that you can’t build as much compression as the engine calls for.

[SpawnedX]

[quote]Quoted From Six6vetteguy: _x000D_
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I would also recheck Compression with a different compression tester.

[619DioFan]

Coolant in your oil could indicate a blown head gasket. if you have access to an air compressor you should do a leak down test. a jumped t/belt will cause your valve timing to be off causing a loss off cyl compression due to leakage out of a valve(s) not

[Grease Monkey]

[quote]Quoted From Six6vetteguy: _x000D_
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jumped timing would keep your valves open longer so that you can’t build as much compression as the engine calls for.

[dreamer2355]

Did you try to start the vehicle in a clear flood mode?_x000D_
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Is the fuel filter installed the correct way?_x000D_
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Did you check the mechanical timing of the engine?_x000D_
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Keep us posted.

[Grease Monkey]

Fuel filter is installed correctly..and i havent checked the mechanical because i dont know how to…i did notice that was a little bit oil in the coolant reservoir..this leads me to believe that the head gasket needs to be replaced

[KZ 259]

if the timing jumped, wouldn’t that also mean bent valves?

[outdoorsman310]

only if it was way off. i am thinking its timing or fuel washed down the cylinder walls

[rice400]

Quoted From KZ 259: _x000D_
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if the timing jumped, wouldn’t that also mean bent valves?

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depends on if its an interference engine or not, to be honest i’m not familiar with honda engines so its hard to say

[Grease Monkey]

how can i check if fuel went down the cylinder walls??

[rice400]

You can either do a a clear flood mode or you remove the spark plugs and let it sit overnight.

[Author]

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