E85 now wont start

[hellssephiroth]

Awww lol wont have the car out then.

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[llabmik2]

I know these are different cars, but these are the scaling's we usually use on 91 pump, and E85 for RC750's on Evo's

RC 750s

Scaling-665 (E10)

Scaling-551 (E85)

Volts MS
4.69 3.576
7.03 1.944
9.38 1.296
11.72 0.984
14.06 0.768
16.41 0.624
18.68 0.504

So take 665/1.3=511

So I would scale at 511. Then go from there.

What do your fuel trims look like?

You want those as close to zero as you can get.

If its also idling like crap, make sure your AFR and your timing are pretty static at idle. This will help you.

10.5-11 ish boost is to rich for E85. 11.7+ is where you want it in boost. Spool I would be in the 12.8's to 13.2's range.

If none of that helps, I would try to idle it in open loop to see if that makes it smoother.

[Greg E]

I used a different formula for injector scaling that better matches the true injector scaling. Using the scaling numbers you posted will cause the car to run rich.

The latency numbers are still the same though.

[llabmik2]

I used a different formula for injector scaling that better matches the true injector scaling. Using the scaling numbers you posted will cause the car to run rich.

The latency numbers are still the same though.

Different car also, I will start with those scaling and latency's then dial it in from there. I can get a car to pretty much match the AFR map under WOT, maybe a .5 drift to one side or the other, and STFT in the 1-3 range with a long term about the same.

The scalings are definitely on the richer side of what he posted. I was just giving him a couple more idea's.

Are you using --(New injector size * Original scale value) / Original injector size--- as your formula?

[futurevr4man]

i skimmed the posts so if im echoing something sorry.

i saw you say your off throttle is crappy but cruise and whatnot are good. i can almost guarantee you have a boost leak (read vacuum leak).

[hellssephiroth]

If i do i just cant find it..... I pumped up to 20 and blew my tester off. I still couldnt hear anything. I even borrowed a fog machine to see if i could see air movement..... Unless im not testing right? I have been sealing off one turbo and pumping air in the other.

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[hellssephiroth]

For my scaling i originally did 750 *0.7 thinking that would be 30% richer for the e85. That came out to 525 which i had a few people tell me I did it wrong so i did 750/1.3 and that was 575. Both of them seemed to run about the same just different rpm levels.

[Greg E]

Different car also, I will start with those scaling and latency's then dial it in from there. I can get a car to pretty much match the AFR map under WOT, maybe a .5 drift to one side or the other, and STFT in the 1-3 range with a long term about the same.

The scalings are definitely on the richer side of what he posted. I was just giving him a couple more idea's.

Are you using --(New injector size * Original scale value) / Original injector size--- as your formula?

No, I'm talking about the formula for the Chrome XML for injector scaling (x*.015). The value that's translated from hex in the ROM.

In either case, a simple correction to the injector scaling isn't going to cure this.

[Greg E]

new update. just went for a cruise with it all weird anyways to see what afrs looked like. It seems my cruising afr and boost afr look pretty good i think. 14-15 cruise and 10.5-11 ish boost. Its just the off the gas that is terrible.

My memory isn't so good. I'm pretty sure we've talked about your car before but I have so much going on right now my mind is a blur. Some of these questions maybe redundant but let's go thru them again.

That said, I finally watched your video. I noticed you aren't logging anything. Can I ask why? I also noticed your obsessing over the wideband when you should be looking at fuel trims and narrowbands.

Also noticed you're running a MAFT in blow thru. Which version of the MAFT are you running? What MAF are you runing? Does it have screens?

Not to scare you, but between ray and myself there are over a dozen cars running the MAFT and the only ones that work perfectly are the MAFs setup in draw thru. Every car with issues is setup in blow thru.

Why? While I'm sure it can work (I haven't run it in any of my personal vehicles) there's gonna need to be some fine tuning. The stock airflow tables were setup for a MAF in draw thru so some tweaking to those tables will need to be done in order to get it to work right in blow thru.

Take a log for me and post it. Need to see 2 byte airflow, 2 byte load, short term fuel trims, low long term fuel trims, rpm, TPS, coolant temp, ISC counts, ISC error, idle switch (make sure your file is setup to log the correct bit) and also make sure your AC is OFF.

[hellssephiroth]

Sure I can post one. Do you want a cruise, idle and a pull, or just the idle for now?