[DML] The Flickering Tach, High Hunting Idle Challenge

[doctorDHD@xxxxxxx]

Well I put a scope on the input to the ignition ECU and found that when I  
put the 2.2uF cap across the pickup coil it reduces the amplitude a bit and  
makes it look smoother.  Again this smoothes out the idle and no  flickering.
 
Now for the next part of the puzzle.  Today I put a 390 ohm resistor  across 
the pickup coil and it also "cures" the problem and it works at all RPM  
ranges.  I could leave it that way but I know something is wrong. The  question is 
what?
 
I have been trying two different ignition ECUs.  Do they both have the  same 
weird problem?  Is it the pickup coil itself?  I tried added  grounds to the 
ECU and also replace the wire from the pickup coil connector to  the ECU.  No 
change.
 
Any  opinions?
 
D² &  6530


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