- Jan 17, 2016
- Reaction score
- Ram Year
- 14 Sport
You still need a mechanical gauge screwed into a plug hole to do a compression test with a scan tool as far as i know.All the scan tool does is open the throttle blade to wide open,and gives you the ability to crank the engine over via the scan tool and give you a relative reading of which cylinder might be down.You can accomplish the same thing by using a screwdriver handle or some such tool to manually prop the throttle blade open,and pulling the starter relay and either using a remote starter switch or a piece of wire to jump the relay terminals. If you have a way of doing it with just a scan tool and no mechanical gauge in a plug hole,please clue us into how you're getting a psi number for each cylinder.I'm open to learning new ways of doing things,so i'd sure like to know how a scan tool can give a psi reading.You'll notice they still have to use a gauge to actually get a cylinder pressure reading,all they're actually doing is measuring starter current to check starter load and speed to get a relative reading,not an actual psi readingA compression test can be performed using a scan tool.
This is a demonstration of the Compression test feature of the Autel MS906 scanner.Autel MS906TS https://amzn.to/3cKRtuSAutel MS906BT ...
Relative compression test using the Snap-On Verus. You do not need a Snap-on scope to do these tests. The same procedure can be followed using any Lab Scope...
***EPISODE 1*** https://youtu.be/il9iR095teMThis video is episode number 2 of 6 in a mini series involving a case study of a P0016 problem on a 2007 Toyota 4...
For you DIYers out there, the first part of this video will be invaluable for you because all you need is your ear. What does an engine sound like during cra...