willysmjeeps.com

You should have on your work bench the following test units:

1 - Compression test gage.
2 - Leak-down compression test set.
3 - Vacuum gauge.
4 - VOM
5 - Timing light
6 - Dwell/Tachometer

In addition if your jeep is stock 24V waterproof electrical system
1 - Harness adapter kit.

A pencil and note pad should be there as well to record test results.

As a note on keeping communications on a level field it always help to describe in detail:

1 - Your vehicle. (most folks include their vehicle make/model/year in their signature element for all their posts.)
2 - Your problem, Describe in detail and add operating conditions at time of occurrence.
3 - If you completed any tests please post the results here.
4 - Give your intended viewers access to your 1st name at least to keep the chats friendly. Also helps posters target their replies when there are multiple posters.

I believe that one of the best "tools" you should also have on your bench is a complete set of the technical manuals.
Most are free for download here in this forum (so there's no excuse for not having them).

Besides having very good troubleshooting guides, they also provide and illustrate assembly and disassembly instructions (along with critical measurements if called out) and very good parts listings.

Another useful manual to have is the Willys Jeep Universal Service Manual, available here:
https://www.thecj2apage.com/forums/univ ... 28616.html

And if you own a M38, having a copy of The M38 Reference Guide (by Ryan Miller) is a vital source of great information.

Communicating well and offering good advice is sometimes difficult --- but the manuals give all of us a common frame of reference for discussing details.
Posting good focused tight photos when asking for help is also one of the best things you can do.

Lastly, while it takes some skill to navigate, learning how to search thru thousands of posts collected in this great forum over decades of experiences can often provide answers without having to ask.
The odds are great that the question you want to ask has already been asked and answered many times.
If you find an old post that doesn't quite help completely and you'd like additional clarity, don't hesitate to use it as a basis for asking your question.

Just my 2 cents. Good luck!