MSefi.com read only forum (Jan.15,2018)

I solved this problem a month or two ago. I was running 4 squirts alternating and went from 24lb injectors to 33 lb injectors. This dropped my lower fuel req from 6.6 to 4.8. The new lower fuel req put my idle and cruise pulsewidths to around 1.7ms which was too short for the injectors to spray ...

Thanks. I got the knock detection working but not with the knock LED or Buzzer yet. Would a 1N4001 Diode work?

I could probably get the GM knock controller to work but I don't want to monkey with the stock knock detection circuit. This car electronically controls boost based on the knock sensor so the knock sensing system was designed and tuned very well from the factory. I think I should be able to get ...

I want to install knock sensing on my 85 Saab 900 Turbo which is running MSII v3 2.883 code. The car uses a boost control system called the APC, which is designed to cut boost when it detects engine knock. The APC controller has a spare pin (#5) on its connector that goes to ground when the system ...

I did some more testing and the problems are mostly at idle and low map pressure. It bucks or surges because the AFR is going lean and rich. I tried adjusting the injector opening time and VE table. I noticed that it would only idle smoothly at a much richer AFR. With the old injectors it could idle ...

I installed larger injectors that I pulled off of a car at the junkyard and now the AFR goes way lean in cycles. When I added the injectors the only thing I did was calculate a new required fuel based on the new injectors. I assumed that if I got the required fuel correct then I would not need to ...