No spark when cranking but tries to fire as soon as I let off the key.

[Sinitro]

Sinitro,
I know how ign systems work & probably knew decades before you did. I was switching ign coils on/off with SCRs in the 1960s....
See if you can spot the errors in the link you provided....

Many thanks for ur observations.. We know this subject very well, been building magazine projects cars for major clients used as cover cars, SEMA, CES trade shows for many years. Pius being the holder of multiple patents..

Just my $0.02..

 

[sam dupont]