Lame'O compression test question......?

[howslowcanyougo]

Originally Posted by tim

And yes, you are supposed to hold the throttle plate wide open when you do a compression test.

Why?

[tim]

It allows the max amount of air into the cylinders. I think that is the reason. That is what I was told a long time ago and I have done it that way ever since.

Maybe someone else has better reasoning, I guess I have never really thought of it.

[howslowcanyougo]

Originally Posted by tim

It allows the max amount of air into the cylinders. I think that is the reason. That is what I was told a long time ago and I have done it that way ever since.

Maybe someone else has better reasoning, I guess I have never really thought of it.

So then my readings with the throttle not open should really be higher than 150 that I just got then or?