Awesome, that's good to hear!

 

I am on CA 91.

I started out with 943 an noted a few posts ago, and had some tough high idle issues. I am still learning the ISCV stuff, but I was only able to force it down to poor from terrible using those tables.

I did some at cruise logs today and my LTFT Mid was at -12.5 so I have raised the scaling to 1008, logged some more, and they were still at -8.6. This has lowered my idle considerable, down to what I would have expected. Idles at 800 ish when warm, and almost wants to die at times, but doesnt. I will have to undo my hacking around in the CTS Adder Table I believe and start over with those once I have the scaling tighter. My point here is that 943 on CA91 seemed a bit too low, because my idle was nuts at 3k, and tough on the engine that was just built and dormant for 6 months (read: bone dry).

I am going to raise it another two steps or more as needed, but I was wondering if I won't run out of room before I am at the 1100s size value. Is there something else I missed that should be adjusted first that compensates me being this close to an 1100 value?

 

Start with the values that I posted earlier, and we can go from there. The latency values also affect the mid trims.

If you are using 1.296 as your 14 volt latency, that is a HUGE difference from my 1.008.

 

+1. that is a huge latency. and latency does have a significant effect on the mid trim. best to gauge mid trim by steady driving at highway speeds where fuel demand is higher and the effect of the latency on mid trim is reduced.

also, one thing i recommend now to people dialing in injectors with a bigger fuel pump is tweaking the fuel pump full voltage transition table to increase the transition load. at more than 2500 rpm, the factory values cause the pump to kick into full voltage at anything over 50 load. full voltage at this low of a load (low fuel demand) on an aftermarket pump will mildly overrun the factory fpr which raises fuel pressure and skews the mid trim to erroneously lower values.

 

Yea, thats the value that works for me. My trims are sitting at +1 & +2. Everything in my car is the same as the Evo, except the ecu, so maybe there is something else which makes my values quite different. My car came with a smaller MAF which had my scaling in the 800's, but now it has an Evo MAF and I've copied the Evo MAF settings and my scalings are at least in the ball park to what Evo's run.

MrFred, would you mind trying to find the transition tables for my rom? I have a few other things I'd really like to find in my rom too. Let me know if you are interested and if so, I'll send some $$ your way.

 

Crap, ok this is what I used from the previous posts to start off. So you are saying those latencies are effecting the fact that I have to use what seems like a very high scaling.

I think I didn't use that post numbers because it noted 93 Octane, and I have 91 pee water. So I guess I should use your latencies even though the octane difference.

This is what I have.....

 

Latency is universal across all fuels that work in an Evo. Once the latencies are set at good values, only injector scaling needs to be altered when switching from gasoline to E85. No change needed for different grades of gasoline.

 

+1 on what mrfred says re the fuel pump load settings.
With big fuel pumps, bump those load settings up some.
If you think you need a scaling of 1008 with these injectors, then something else is affecting the result.
Start by assuming a scaling of 943 is correct and work from there.
I notice peoples 11.7 volt latency values vary considerably, this is likely a prime source of trim errors as the normal operating voltage is less than 14 volts so a degree of interpolation is being factored in here.

 

OK, I have a Walboro 255, but haven't installed it yet. I did this with the logic that I could get cruise and idle tuned for the cams and injectors without the pump being a possible source of issue. The least changes at once kind of thing. So I am getting from this I need to install the pump and make some ECUFlash settings for it. I haven't come across fuel pump threads (tables) that weren't the rewire stuff.

I flashed the PrimerSdime values, and will look for the info on the pump install and settings. Thanks for the tips!

 

There is a thread in the ECUFlash forum. I'd do all near-term mods before dialiing in the injectors.

 

Log those trims after you flash my scaling/latency values and get back to us. I'm curious to see what the results are.

 

mrfred - Interesting and new info for me. Could you give some examples on a change and to what table. I have also deleted the fpr solenoid between the intake and fuel rail as per the EGR delete in case that has an impact.

 

Check the thread in the ECUFlash forum. It includes the table xml and recommended values.

 

PrimerSdime/mrfred - I've been running your values for a couple of weeks now. My mid trims have been between -3 and +2 %. However, one issue I've noticed is that when I am cruising along and I let off the gas, my wideband shows I go super rich - like 8.9-9.0. Should I reduce the latency at 11.7 volts or is there something else that would cause the rich condition on decel? I plan to flash the fuel pump table updates tomorrow.

 

Thanks, For other quick reference, I think you mean this....

https://www.evolutionm.net/forums/ec...ion-table.html