I have read lots of posts here asking for trouble shooting help on older 911 CDI ignition systems.
One of the first troubleshooting steps is to see if you have a signal from your points, hall effect trigger or other source to the CDI. Basically the CDI is looking for a square wave signal from the trigger source.
I have a tester that I bought to do this. It is a tester made by MSD that puts out such a signal. It looks like this:
This tester works great to test Bosch, MSD, Permatune, any CDI.
I bought mine used on eBay, but it still was not cheap. New they cost $250 to $300. OK for a shop that is doing CDI work, but a little steep if you are using it to solve your CDI problem one time.
I have been looking at a BUILDING much cheaper device that will do the same thing. My theory is that if the price were in the $50 range, 911 owners who have some ignition knowledge would by one for that occasional testing.
What I have in mind is something simpler, maybe no digital readout. This would be a high quality rugged tester that will last for years, but more basic than the MSD.
My question is does this make sense to other Pelicans that have needed this type of tester. Would be pay $50 dollars or so for it?
Let me know. If I get some positive response I will release more details soon.
Thanks.