superkizuna

iTrader: (2)

Forum,

So.... I pulled my injectors and installed some Precision 780cc I purchased from https://www.evolutionm.net/forums/me...ivian_evo.html. Install went well, got a new seal kit from STM to ensure there was no dry seals. Lubed them up pre-install. I flashed the ecu with:

Scaling 696

4.69 3.504
7.03 2.184
9.38 1.224
11.72 0.96
14.06 0.744
16.41 0.552
18.68 0.432

Started her up and it sounded like the car was lobing hard. I only have 264/264 in there so the additional lobing sounded amazing at first but then the grin slowly shrank as I watched my AEM UEGO go from 15.0 afr to full lean (-- --). It stayed there. I tried a few other scalings and the results were the same

I'm thinking there has to be a leak so I check the injectors and how they are seated in the intake manifold. I take them back out and re-seat them to be sure. There is no leak there. I am really losing my mind over here.

I can't seem to log LTFT or STFT for some reason. I don't even see STFT in evoscan but for some reason LTFT isn't logging; it returns a value of 0.... wow. When it rains it pours.

I have the sim hook patch running; is that giving me the zero?

What on earth could be leaking? Everything was seriously tight like 4 hours ago!

Basically, I need some help here this leak or whatever is killing me. Could improper scalings and latencies show full lean though? I didn't think that could happen without there being a leak.

superkizuna

iTrader: (2)

Also the car is not showing any trouble codes and no SES light.

Klaiceps

iTrader: (18)

Try adjusting your latencies lower to add fuel and see if that makes a difference.

dr_latino999

iTrader: (12)

Yes. I just installed my 1650s last week for E85, and had started them with the 93 map loaded. The engine idled, but it pegged full lean. I was honestly amazed it could idle that lean.

superkizuna

iTrader: (2)

I don't understand how the scalings I'm using can be so far off that it runs full lean.

Klaiceps

iTrader: (18)

It's possible to be off on latencies depending on how your MAP VE and RPM VE tables are setup, assuming you are running SD. Try adjusting it and report back. If it doesn't work you can always go back to your old settings.

superkizuna

iTrader: (2)

I am running MrFred's patch for WBO2 closed loop cruise on rom 88590015. The only other patches I'm running are for OBDII testing.

I pulled the timing up to 60 load from 7 to 5 but that didn't do much of anything. The car is idling but it's rough. Feels like its vibrating and lobing way hard. Kind of freaky while watching the WBO2 peg full lean.

I tried bringing the scaling down and that did change the idle. I dropped it to 600 with the same latencies as noted above but it's still really bad. I refuse to give up on this. I checked like crazy for an exhaust leak but there really isn't any. I didn't see any vacuum leak either.

Reading dr latino999's post is relieving but this entire thing is no fun.

Should I post up in ECU section to try and get to the bottom of the idle issue? Does anybody have some super vanilla scaling and latency values for 780cc PTE that at least won't peg full lean?

dr_latino999

iTrader: (12)

So I'm on the same page - Not running SD, running MAF?

Injector Scaling and Latency Thread of Wins

Great guide; without the guide and just ball parking blind I'd lower the scaling number another 10% and see if that improves the AFR.

dr_latino999

iTrader: (12)

https://www.evolutionm.net/forums/ec...ml#post4922633

4b11slayer

You are making blind adjustments with out fuel trims.

Reset your ecu by removing negative battery cable and try re logging fuel trims.

24 min at idle should be plenty for ltft low

superkizuna

iTrader: (2)

I'm not able to get STFT or LTFT to log in evoscan atm. I'm thinking it has something to do with the Rear O2 Sim. I enabled the stock Rear O2 again. I thought that fuel trims reset with each flash. Is so 20min for LTFT to show back up? I will give it a shot. I don't know how this thing is reading full lean, it smells like a gas station lol.

Is it safe to let the car idle like this for 24min? I don't want to really jack things up worse.

4b11slayer

Whoops just noticed you have a evo 9. Yes they do reset after each flash.

Stll tuning injectors relies on trims. So you need to get that logging issue fixed.

4b11slayer

And I believe stft feed back is produced by the front o2 sensor.

superkizuna

iTrader: (2)

Okay, I'm going in to log it now. Just to add insult to injury I found that somehow the coupling for my intake got loose and I tightened it down thinking that I was going to be homefree and no. Not so much. I tried to make sure to lean on the engine block during the install. I will double and triple check all the couplings for the intake and cold side parts.

My god this is frustrating.

superkizuna

iTrader: (2)

Got the STFT to log in evoscan:

During cold start warm up it got up to +20
As soon as the engine warmed up it hit +5.1994 and stayed there even when reving a bit

I'm going to log idle for 15-20 min as per merlins guide to tuning universe. Looks like I need LTFT to get this right.

scaled to 680
3.624
1.992
0.984
0.744
0.576
0.456

On a side note: The cams 264/264 were never so full of lobe before. They are beating the street a little bit. I'm guessing injectors can do that or am I really f(*&ing up?