That black component that had the one leg solder joint broken is BUV37B

Looked up and it’s , if I read it right, a power transistor.

Alistair 

>> On Mar 31, 2020, at 2:41 PM, Alistair Bell <albell@shaw.ca> wrote:
> Hi,
> 
> Yesterday wasnt much success. Was planning on more but it poured ra=
> in most of afternoon and I really didnt want to fool around in the wEt.
> 
> Went into work at 5, got my work work going and then tried....
> 
> Timing light with trigger tie wrapped on, inductive lead around plug lead, etc. Crank and no flashing of light.
> 
> Installed spare dizzy. Now I have now idea of hall sensor in this unit ok. BUt installed made no change, cranks and no timing light flash.
> 
> I was getting pretty disheartened. Back to work and out by midnight .
> 
> Today I got the ecu into the home workshop. And looked at it more carefully.
> And I did find one bad solder connection. The pin does move in the joint when lightly probed.
> 
> https://shufti.files.wordpress.com/2020/03/65892428-f4f0-4c98-b531-805319377126.jpeg
> 
> It corresponds to the middle leg of this black square heat sunk component.
> 
> https://shufti.files.wordpress.com/2020/03/2171ce8f-47d2-47f0-be1c-03f92115a95e.jpeg
> 
> I will reflow the joint unless I hear back from you guys not to bother=
> :-)
> 
> Alistair