Doing a Relative Compression test using the Launch x431 with Spark Plug in and Spark Plug Out.

[@hayguey7952]

Did u disable fuel or does the scanner does that when do the test

[@737mechanic]

It does that on its own.

[@bobbymike]

Great vid mate I agree with what ur saying and well explained 👍👍👍

[@Mental.Hub.]

How do you do I/M Readiness test for emission on the X431?

[@thalegacy6]

I belive you do a health repot, then enter into the pcm it should be in there. Or I believe you can access it from the x431 home page.

[@michaell.445]

Let it warm up to normal idle speed then drive it. It will tell when each component is ready compared to how many testable ones there are installed.

[@khurramkhan7053]

Hi,I have just seen this video, surely scan tool should say 100 percent lose of compression,rather than 10 percent Regards

[@737mechanic]

Even with the spark plug out you still have some compression.

[@khurramkhan7053]

@@737mechanic thanks

[@PantoEfrenJr]

So fast tutorial make it slow.