[Ryan P]

I did the test last night, just for shits and giggles. I don't have the exact numbers on hand (i'm at work), but the results were pleasing. I had 163-165psi throughout all of the cylinders. I did the test with the engine at operating temperature and both EFI fuses pulled. The one question I had was, After doing the test I remembered I needed to press the gas pedal so that the engine could get air to make compression, which I didn't do. So this leads me to my next question, how did I still get consistant numbers? Is it not required to open the throttle body?

 

[Ranger498]

this might help!

http://www.mkiv.com/manual/manualtt/compression_check/index.html

 

[Ryan P]

I have the manual. As I said, I did everything I needed to except hold open the throttle body as I cranked it over. From what I recall, not doing this would only lower your numbers due to lack of airflow and the creation of a vacuum.