Bhg vs worn rings vs valve guides

[Monkey]

Originally Posted by IHateHacks

I know this is a day late and and a dollar short, but you didn't perform that compression test properly. You must hold the throttle wide open during the actual testing of the cylinder. I know your readings are all way too low anyways so in this case it didn't matter.

I can't believe that engine even ran.

I'm kind of curious as to how you think that holding the throttle wide open is going to have any affect on checking compression. It doesn't matter. A compression test is a compression test is a compression test. I don't need to hold the throttle open on any vehicle, let alone a third gen Supra to find out that it has broke/worn rings, or sticking valves. Pull the plugs, stick your compression gauge in, crank the engine with the fuel pump fuse pulled, and check what you get. The throttle has no affect on the cylinder's compression.