low compression on all cylinders

[abugarcias]

My engine has been running rough and I've had some loss of power when I accelerate. I tested the pressure on all cylinders and here are the results:

 

1 - 60

2 - 90

3 - 75

4 - 85

5 - 80

6 - 90

 

What could this indicate? Timing chain?

[jimoshel]

Worn rings, cylinders. It's ready for a rebuild.

[dfreeman616]

or possibly timing... shoot a little oil down in each cylinder and repeat the compression test. if the numbers come up, piston rings = rebuild time, so how much do you want to upgrade :brows:

[Timmaay]

Or the gauge could be reading low...But you still have a good bit of variance between cylinders anyhow.