Umm, which side goes down
Join Date: Sep 2007
Location: Denver, NC
Re: Testing CDI
Tuning of RS series carbs is much different than CVs and the Factory Pro advice is based on mildly tuned engines and CV carbs, not on an engine with 12:5:1 compression, different cams, larger bore, different stroke, larger valves, etc. One of the major issues you have with tuning in a built engine is you have no baseline to begin with and its got flatsides. You start with the stock carb baseline and work your way up. If I have to turn out the screws five times when the standard is 1/4 to 1/2 turn I'ts obviously lean. If you'll check the first post I've already run through any standard tests I could think of, Voltage at coils, Ohm out the circuits, etc. What I'm seeing is intermittent spark, at best, on an engine that ran (albeit extremely lean) two days ago.
I am going to run through all the wiring and see if anything has been pulled or kinked. So the above advice renders a few question
Can a CDI go intermitantly before it fails completely?
Is the crank trigger at fault and is there a simple test for it? (havn't checked the manual on this one yet)
When going back to the circuit at the CDI is there a standard reading (ohm) that I sould see between pins to verify its funtionality?