Quick question here for the engine builders. I learned many years ago that to perform a compression test properly on an engine with induction installed (either carb or FI), the throttle valve should be opened. This is how I have run compression test myself over the last 30 years....and how I've seen professional mechanics do the same.
Without opening the throttle valve there's a possibility of not fully drawing in the intake volume completely, thereby making the test results erroneous.
Thoughts?
Without opening the throttle valve there's a possibility of not fully drawing in the intake volume completely, thereby making the test results erroneous.
Thoughts?