[Gmecm] Going DIS

[Fernando Maggi]

I have worked the 6+1 notches in the balancer, the crank sensor is 0 TDC @ 1 & 4 cyl fire notch and as far as I know the ECM handles de the spark timing (EST) and the module selects 1 & 4 or 2 & 3 firing.

I think we need:

2 pins sensor - since the crank sensor provides AC signal both wires should be connected
1 pin REF
1 pin EST
1 Pin BY-PASS (crank)
1 pin GROUND-sensor shield

Total 6 pins, what I don't have is a dice to make the correct order
PS. pin 6 is grounded


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  ----- Original Message ----- 
  From: Djfreggens at aol.com 
  To: gmecm at diy-efi.org 
  Sent: Monday, March 28, 2005 3:02 PM
  Subject: Re: [Gmecm] Going DIS


  if we are talking 2.2 2.5 dis then this is how it works. 

    uses a 6x ref pulse. 60* notches six of them. then a odd man out 10* btdc. thats notch 7 it is the sinch notch for the module. 

    the moduel hanldes conversion of the crank signal into a hmoginized 2x per revolution signal that the ecm would typically see with a distributor application. the notch sequnce for a .23 2.4 sohc dohc quad series engine is the same but the refernce pulse has been moved and i dont remeber to exact were. 

     either way the module handles the signal conversions and the ecm simply changes the duty cylce on the est control line to handle timing. 



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