So, I’m back up and running. Surgery went well, having to sit in bed with my foot above my heart (controls swelling) for 2 weeks was terrible. Finally got the casts off yesterday and can start walking around with a boot. But only for a limited time, as it swells up again. I have been working from home through, so that has kept me busy.
While I was down, I did do a lot of reading on the Holley EFI systems and how to tune things. I have very few complaints about the Holley Sniper I have on my truck, it starts immediately, ran smoothly all around AOAA, and drives pretty well on the street. It does seem to run rather rich, especially at startup and idle. Plus it had a funny dead spot when it’s cold, where at the first corner you come to a stop at it would die. I’ve updated firmware and re-ran the wizard to let it start from scratch and it got better, but still happened occasionally.
So I got educated enough and watched a bunch of tuning videos, and pulled the files from the ECU on the SD card. I didn’t make a lot of mods for my first try at messing with it, but I did pull 1/3 of a point from AFR everywhere and backed down the startup fuel enrichment about 10-20%. Dropped the new file in the ECU and it started up fine, now needs to go thru the learn cycles again to adjust to what the motor wants at various places. I’m not controlling timing yet with the ECU, there’s varied debates weather timing control behaves reliably with an MSD distributor and CD ignition. But I’m not ready to drop $500 on a new ignition system yet. I should go ahead and check timing again to make sure it’s in the right place.
Now the fun part. I can’t drive the rig yet, right foot is strong enough to push the gas but I’m not comfortable with 3 pedals just yet, especially if something were to happen and I needed to make a quick move. Probably another month before I can really do much in that department. So I think I’ll have Dad come over and drive it with me, and see how it does. I have the base tune stored on the SD card as well, so worst cast I could always drop back to that. Screenshot of the EFI software below