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should be in between intakevalve movement and exhaustvalve movement

Yes, valves should be closed.

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Q: When you align timing marks and have it TDC the cam valves should be closed on compression stroke?
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Where should the cam position be when setting timing marks on a 1994 Honda Civic 1.5L sohc?

#1 piston should be at TDC and both valves closed (compression stroke)


Can a retarded engine cause low compression?

If the timing is retarded due to cam and crank timing, the answer is YES. If it is due to distributor or ignition timing NO. Compression is produced mechanically when all the valves are closed during the compression stroke of the piston. If all is well (rings and valves), you should achieve optimal compression from the engine. Almost all gasoline engines require a least 80 psi to fire the cylinder.


When timing a 3.0L Plymouth engine I understand that the 1 piston should be a TDC on compression stroke but on the other cam should the 2 piston be on compression or exhaust stroke?

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Does rotor point to number 1 when timing marks are lined up?

Yes, if #1 is at TDC on the compression stroke.


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Why would I have low compression in my 1997 ford escort 2.0 low compression when the timing belt was replaced 1000 miles ago and it will not start now but the belt is right on the marks?

You've realigned the marks, but did you check which piston stroke? The marks will align in two instances, top dead center on the compression stroke, and top dead center of the exhaust stroke. I'd bet money that you've aligned the timing marks to TDC exhaust stroke. That would explain 0 compression in all cylinders. Rotate your crank shaft by itself (leave the camshaft where it is) 360 degrees (one full turn) and you should then by aligned to TDC compression stroke, as it is supposed to be.