babywag wrote: ↑Tue Nov 12, 2019 5:14 pm
I am confused, if ecm isn't controlling timing why does it have (or need) a timing disconnect?
Timing should NOT be 0° initial if ecm is not controlling timing.
If engine hesitates when cold I would expect to see timing drop out? Since you state it is manually controlled & based on vacuum & mechanical.
I'll take a peek @ logs and see if anything jumps out.
But bump that initial timing up.
Hey, Babywag - am confused, as well. The Frankenstein nature of the setup makes it hard to tell what i have - no shops want to touch it, so i'm on my own - hence, the crazy questions
. Am going by what tech support at AFI told me - that ECM doesn't control spark. I asked about moving to a setup where ECM did control spark & it was recommended i not go there, given i had an existing/working system - which is debatable...
Poking around online, i found a post on gearhead-efi.com, you'd made asking about creating a fuel-only EFI setup, and was looking for a tach filter to finish it out
http://www.gearhead-efi.com/Fuel-Inject ... or-1227747. Given my system dates to 2006, am wondering if it's not similar to what was being talked about there?
Also found an article that talks about fuel-only EFI - bullet #10, specifically talks about a hybrid distributor (original stalk mated to a GM cap, including an Electronic Spark Control, or Ignition Control Module).
http://www.gearhead-efi.com/gm-ecm-pcm- ... rsion.html. Am thinking a fuel-only setup is what i have?
In the above gearhead-efi article, there's a mention of a 'tach filter' being required. I assume there's one somewhere, but so far i've not found it. Honestly, i don't know yet what i'm looking for.