OK, complete noob at this so probably an easy answer, just hard for me to see.
Trying to get first idle set so I can get into refining it, then getting it moving to start the real tuning. Got it to idle poorly, but good enough, would start and idle up to full operating temp consistently. Was starting to get it worked through in gear. Started dying out after a little bit, then more often. Seemed like it was starving of fuel, didn't surprise me as I have no idea how much is in the tank. Added 5 gallons and still had worsening problems. Had good fuel pressure at the rail. Started thinking it may have had condensation build up as it sat over last winter and maybe a slug of water came through. I took my fuel pressure gauge hose and pumped some fuel into a jar, looks good, no water. Now it won't start at all.
When I log it before trying to start it will show ~5.4 ms injector pulse width average, which may jump up to ~12 or more when I crank it (it was ~3.6 or so when I did have it idling). It shows ~2,000hz MAF, 50lbs of Dynamic Air Flow, and a few other things, all with the engine not running or even being cranked.
I'm leaning towards a grounding problem but I've checked them. I haven't checked them at the ECU side of the harness yet but that's my next move.
(Of course I decided to get into this by doing things the hard way: LY6 with 24x reluctor and 1x cam gear. P01 ECU, Holly Sniper DBC throttle body)
Here's a log of trying to start it this afternoon
24-10-05 14-42-56.hpl
Thx for any help,
JR