EFIDynoTuning Forum

I’m going to try it again and see why it wouldn’t run I just didn’t have the time at that moment that’s why I switched back

Is it possible for the fuel pump to be getting maxed even the duty cycle says .43 which is about 86 percent ? I can’t get the fuel pressure to follow 40 I’ve played with the pids , I halved them at first but I don’t really know what to do with them just been trying different settings . When rolling into the throttle fuel pressure shoots up then drops to about mid 20s the afr stays fine though because of the compensation so I haven’t worried about it too much but would rather not have the pressure so low

It’s the same bin I’ve been running for the past year or so ,
I tried the newest one you posted but the car wouldn’t stay running and I didn’t have the time to find why so I switched back to the bin it’s been on

I checked those and somehow cyl9 was -3 and cyl8 was -0.25
So I made cyl8 -3 also and it just backfires like crazy out the exhaust if I put it back to -0.25 it’s fine

Is it possible to do individual cylinder timing on cvaf1 ? At least for cylinders 7&8 on a 4.6 . If so what scalar would it be?

After playing with the fuel pump settings I still haven’t been able to get rid of the hesitation when shifting it’s gotten better but still there I tried putting proportional and integral both to zero and the hesitation was gone but then pressure wasn’t where it needed to be , how do you normally go about tuning the pids?
Also the pprv is still in place so you recommend removing it to help , only reason I didn’t is because I saw a few people blow the sensor afterwards

Also what function is for the idle spark torque reserve I couldn’t find it

In the fuel pump voltage table are the rows the target pressure ? If so I would only worry about 40 psi because that’s what I’m targeting ? Just wondering because when using the histogram the values for 40 make sense but the other pressures seem backwards like higher pressure is lower voltage , unless I miss interpreted it

Also I’ve noticed even with 340 pump it’s showing the duty cycle on the pump is almost maxed out
It’s a stock 2v turbo on 7 lbs probably making high 300s low 400s I don’t think the 340 should be maxed yet

I’ve been trying to tune out a pressure spike on shifts would you happen to have any tips for that? Is there a table for the pulse width vs fuel pressure correction? If so I thought about add more fuel at lower pressures to compensate for the drop , I’ve tried tuning the voltage table.

Also for idle timing in cvaf1 with simplified timing how is it controlled because I don’t seem to have all the functions listed in the timing article
My idle timing even raising with mbt tends to stay low around 10-11 degrees