Got a fuel pressure gauge? Hook it up and you will see. More pressure, more flow! Well what happens when your regulator doesn't keep that pressure constant? The flow rates change. The larger amount of fuel I'm hoping will fix that idle resolution since the 950cc on E85 would be more like 650cc on pump. If that's the case, I'm going E85 after this tank. The only thing I can possibly think is it's too much injector on pump for idle resolution to be good. It makes no sense to me.Īny help or knowledge would be great. Pulsewidth is always around 1.5ms and doesn't raise or lower with AFR. Fuel pressure is good at all times, doesn't raise or lower with AFR changes. They were flow tested at 972cc at 43.5psi according to the sheet that came with them. I used the latency numbers FIC provides with the injectors. 5 after idling for about an hour), so I don't particularly think it's tuner error. My local tuner friend was actually amazed how close I got my trims (.25 and. I had no problems getting the 550s tuned. Raise the RPMs to around 2k and up, it stays fairly consistent. When I put it up to around 900cc and up, it's around the right AFR, but after it's warmed up, the AFR will cycle from ~13 to ~22.4. When it's down by 750cc, it idles around 12-13 fairly smoothly, but obviously my trims are completely negative. I've tried all kinds of settings from 750cc to 1050cc in the flash and nothing works. I cannot get the damn thing to run right, though. I'm just trying to get a basic pump tune to drive until the 91 is out, then I'll be filling up on E85 and retuning more precisely. I was previously running Delphi 550s with a Walbro 255. I'm on Chrome and I've installed FIC 950s with an E85 Walbro 400. I've been working on this for a few days, and I just can't get it right. I read the other thread from just recently with nomie, but my issue is wayyyyy more drastic.

Fic950 evom