Mitsubishi 3000 GT
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What should the cylinder compression compression test be on a 94 3000gt be?

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2011-01-22 04:44:06
2011-01-22 04:44:06

It should be a high of 185 and a low of 140

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I have a 2005 and compression should be close to 120 psi. Normally a good engine will have compression between 115 and 130 psi but a leak down test should be performed also to know the full condition of a cylinder.



The ratio is 9.5.1 in the 350 vortec. Doing a compression test you should not have any below 100 psi and all should be similar to each other.


compression test or leak-down test.


Just did compression test on mine and the normal seems to be 160 -180


Oil burning or loss of compression on any one cylinder. It may also be missing on one cylinder. A compression test will verify this.


You will have to do a compression test yourself to know that. A engine that is in good shape should have at least 150 LBS. per cylinder. There can not be more then 20 LBS. difference in any cylinders. It has to have at least 100 LBS. for the cylinder to fire at an Idle.


The easiest answer is when it fails a compression test. Buy a compression tester (farily cheap), and test each cylinder. If one single cylinder is below 120 psi, or if one cylinder reads 15% less pressure than the cylinder with the highest pressure, your engine should be torn down and checked. The problem might only be in the heads, but it's still time for some serious work.


This all depends on why it has low compression. If the rings are worn out, the motor should be rebuilt. If one of the valves is bad, re grinding it or replacing them is the fix. Perform a cylinder leakage test to confirm it. You will probably need to take it to a shop for this, but unfortunately, there usually are no quick fixes for low compression.


Do a compression test on each cylinder looking for one that is significantly lower than the others.


The lowest reading cylinder should not be less than 70% of the highest and no cylinder reading should be less than 689 kPa (100 psi). Perform compression test with engine at normal operating temperature, spark plugs removed and throttle wide open.


The lowest reading cylinder should not be less than 70% of the highest and no cylinder reading should be less than 689 kPa (100 psi). Perform compression test with engine at normal operating temperature, spark plugs removed and throttle wide open


A compression check and cylinder leak-down test should tell you the condition of your engine.


Do a compression test Make sure battery is fully charged Remove all spark plugs Lock throttle fully open Check each cylinder Highest should be within 10% of lowest


A compression test will determine which cylinder(s) are at fault.


First thing would be to change the oil and filter. Perform a compression and cylinder leak down test on each cylinder, to determine how, and where, the water intrusion occured.


A compression test can tell you many things such as if you're getting blow by. which means one of two things either all the compression ring gaps on the piston line up in sync or possibly you have a crack in your cylinder. Also if you have the distributor shaft apart from the engine a compression test will help indicate when the proper piston is at TDC (top dead center). If you get low compression on one cylinder, put a teaspoon of engine oil down the bore. If the compression improves, then you have a worn bore or rings. If there is no difference, you have a burnt valve. If two adjacent cylinders are low, it is very likely that you have a blown cylinder head gasket between those cylinders. This could also include a warped cylinder head and may need skimming.


Bad spark plug? Bad plug wire? Do a compression test


the rings kind of seal in the sides of the piston with the cylinder wall. When a compression test is done the air is escaping between the piston and the cylinder where the good ring would normally seal. If you are getting low compression it is more likely the valves


There is no real compression spec for the 2.0 zetec engine. Ford only says that no cylinder should be below 25% or all the cylinders. If it is that cylinder is down. That could be a number of problems such as head gasket or bad rings. Either way. Once you do a compression test yourself I would recommend having a dealership follow it up with a diagnostic. They will be able to give you solutions if there is low compression as far as possible reasons and repairs. Per. ALLDATA Ford NTI/ UTI student


It just means that the railway is not compressed. Say that the railway was compressed, then you'd make a compression check and the answer would be positive, but if it isn't it means it's not compressed. When something is compressed, it means that the temperature was too cold for the railway so it compressed. Hope it helped! :P WHAT???? this person is lost. Ok, when you do a compression test and you receive no compression, make sure your test gage is a working gage. with no compression this indicates that exhaust / intake valves are in the open position which stops the cylinder from sealing for compression, possible bent or broken valve,valve spring,or lobe on cam may be worn. Now if you have a low compression reading on a cylinder i recommend you spray WD 40 into cylinder sparingly and test again,called a (wet test ) if compression raises you have bad piston rings, if it stays the same, its a valve issue, possible piston failure


first you have to determine if it is oil or fuel if it's oil then do a compression test if it has low compression squirt oil down the cylinder and if it increases then you got leaking rings if that checks out ok then do a cylinder leakage test that way you can tell if it is exhaust intake valve problems


First test of an engine is the compression test. If the compression is within 75% of the new engine spec, all cylinders should be within 20 psi of each other. Next test is the cylinder leakdown test. Putting pressure into each cylinder and checking the leakage past the rings and valves. General rule of thumb of any engine- if it starts up on the first 2 or 3 revolutions, does not emit blue smoke from the tailpipe and will pull the vehicle up a hill at normal speed, then it should be a good engine.


Running a compression test is pretty much the same for all internal combustion engines.Remove all sparkplugs, marking where the wires went; you don't want to connect the wrong wires to the plugs when you're finished.Start with cylinder 1, screw in a compression gauge where the sparkplug just came out. Some compression gauges just press in, but I prefer the screw in type.Have an assistant engage the starter as though trying to start the engine. Obviously the engine won't start without plugs.You should hear and/or feel the engine compression on the single cylinder with the gauge in place; make sure that cylinder goes through compression cycle at least 3 times.Read the value on the gauge. The gauge should hold the compression reading, allowing you to record the reading.Write down the compression reading and the cylinder number.CLEAR THE COMPRESSION GAUGE. You can release the compression reading, usually by pressing a button or turning a knob. It's different for different style gauges.Repeat the process for all cylinders.Compare the compression value for all cylinders; they should be within a few percent of each other. Any small variance can be attributed to cylinder or valve wear. Large differences indicate severe problems. If any two adjacent cylinders have zero compression, you probably have a blown head gasket.


run a compression test on it should read about 150 i think bad head gasket or crack in head.



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