[Diy_efi] DFI Bug

[Geoff Harrison]

I must have mentally stalled. The 18 slot interrupter is for RPM 
calculation. Also used to control spark
advance. That would have to remain at 18, or the motor will idle at about 
1050 RPM.

I have since discovered Nissan Pulsars from about 87 on in Australia use the 
same Delco/GM controller. If
the car wasn't sold in US, (it may have had a different name - 1600 - 1800 4 
Cyl, OHC FWD) If you can't
get info in US, let me know, I'll go to the local library and obtain such.

"Many GM ECUs used the 160 baud format. These same ECU can also be found on 
some Australian Nissans, Daewoos, etc. Any specific information shown below 
(eg. oscilloscope traces) relates to the author's 1990 VN 3.8L V6 Holden 
Commodore (described as a "VN" below) using an ECU with GM/Delco part number 
1227808 (often referred to as an '808, or '7808)
We have attempted to make information in this document as generic as 
possible and have omitted physical details such as a description of the 
different ALDL connectors. Note: 8192 baud ALDL info can be found here. "

Its a long time since I worked on a bug. If you go EFI, you have a surplus 
cam lobe and pump. The plunger or actuator could be used to trigger the EFI 
once each cycle. Timing is not critical, the next injector pulse goes to the 
corresponding
cylinder. Another thought, Discard the top of the distributor, set up 
vane/hall sensors as per electronic ign.


Geoff Harrison IT Services.
Port Macquarie  NSW.
Tel 65827181
Mob 0401324639 
_______________________________________________
diy_efi mailing list
diy_efi at diy-efi.org
http://lists.diy-efi.org/mailman/listinfo/diy_efi