NefMoto

Okay. I have done little things with the help of everyone here. I got my widebands installed today and logged them and they look good. I have yet to put on my 102mm maf housing. I have yet to install fuel pump. I have yet to put in my 1000cc ev14 injectors. This is all i really have left.

I am thinking of throwing the maf housing on and tuning that in first. Problem is the housing i have is hitachi and the maf i have is bosch. Advise here would be good. I could switch to hitachi pretty easily getting a sensor wiring it in and flashing a hitachi m box since my tune is basically stock as is right now.

Then throwing fuel pump in. Then doing injectors.

I think this will be the best route. Although it will likely take a month for me to tune these simple things probably more.

From there i will follow the wiki's order of tuning.

Is this a good route to dive in??

Yes, Change only one variable at  a time. Log now and not your fuel trims, and AFR under various loads. Nice third gear pulls. Then install the maf and tune until the ratios match again.

I would perform the conversion first in the stock hitachi housing to make sure its functioning properly, then scale for a larger housing.

105mm MAF housing? That is going to be a BITCH to tune. Why did you choose it?

Bigger is better yo!

But seriously, if it can't be accomplished with a 90mm housing, it's time for a different sensor. HPX is wonderful.

I got a Deal on The housing.
I see how it will be harder To find The value To scale The maf when you use a wayy bigger housing. But how would a hpx help? Is The flow To voltage ratio not like The stock sensor??

Should i ditch this housing or can i make it Work??

Got some logs today. 2nd gear and 3rd. Massive throttle cut. I will work this out first. n75 is unplugged im on waste gate pressure.

What good is a deal on a piece of equipment that is unusable.

If i knew it was un usable i wouldnt have picked it up.

Your saying its unusable??

Started playing with KFMIRL and LDRXN. I set LDRXN high starting at 2000 rpm. I slowly added more and more to 50% and up on KFMIRL. This shifted my throttle cut to right. After one run at second gear some shit hit the fan. pulled these codes

17956 - Boost Pressure Regulation Valve (N75): Open Circuit
        P1548 - 35-00 - -
16487 - Mass Air Flow Sensor (G70): Signal too High
        P0103 - 35-10 - - - Intermittent
17535 - Fuel Trim: Bank 1 (Mult): System too Rich
        P1127 - 35-00 - -
17537 - Fuel Trim: Bank 2 (Mult): System too Rich
        P1129 - 35-00 - -

I have been watching my a/f ratio and knock after each run. I attached my log below.

Scared the shit out of me tho. Thought i blew the crap out of something but it was probably a backfire from it getting rich.

You need to learn to properly plan. Don't buy a MAF that is larger than you need, there are tradeoffs.

What if i used a voltage divider and basically cut the output voltage in half from the maf. Kept the stock housing and everything. Then scale the maps for the maf down by 2??

That isn't the problem with large MAFs.

You're losing a huge amount of dynamic range and low end flow sensitivity with the large MAF

With stock MAF you'll just hit the output voltage limit of 5v.

You're kinda not understanding how a MAF works :/

I am not talking about a large maf right now. If i want more range out of my maf sensor im suggesting cutting the ouput voltage in half with a resistor and scaling all the maps up by 2. Instead of using a bigger housing and scaling the maf that way. Would this work?

http://www.ebay.com/itm/251749658566?_trksid=p2055119.m1438.l2649&ssPageName=STRK%3AMEBIDX%3AIT

No, of course not. You'll hit the max voltage of 5v. Again, you don't really seem to understand how a MAF works.

Ah i see where i was thinking wrong. Thanks for being so patient with me guys. A waste of a thought. However i have learned now to LISTEN to you guys before i blabber on. I will try to do this more.

Thanks dd for the link. When i get closer to getting rid of this throttle cut and get closer to maxing the maf out i will invest in a smaller housing. As for the throttle cut...

My requested load is way lower than my actual. I have increased LDRXN so thats not an issue and i have been increasing KFMIRL to try and get my requested load up. Is this what i should be doing. It doesnt seem to help. What map is requested load? I have looked at the wiki over and over

Thanks guys. I know i am slow but i wont give up, i just need some patience.

It really does not matter if your actual load is not up  to requested as long it is lower ans you get your boost eventually where you want

If your MAF is scaled incorrectly your load will read artificially high (or low), and you will even trigger early overboost diagnosis, and totally wack your timing tables.

I havent scaled the maf yet. I havent touched any maps but KFMIOP and LDRXN. DD are you suggesting i start with scaling the maf? My loads are quite a bit larger than requested. This will be good to remember if the MAF is scaled bad, loads will read artificially high.

Mocke, if this is true then why am i getting throttle cut. I thought that throttle cut would occur when actual boost goes above requested by 200 mbar.

If requested boost is not controlled by requested load how would i go about raising my requested boost. When i take another look at my logs i see the requested boost tapper way way way down. So the computer is trying its hardest to drop the boost. I thought if i upped requested load it would raise requested boost.

Only if your boost is following requested. If you have too much boost, obviously load would be too high as well.


Why would requested boost not be controlled by requested load


It is fairly obvious you don't know what load is :/ This far into the game you should already know.

Ah I see. Load is the change....so to speak. If i flat line load towards the end of the rpm then requested boost will taper down.... nyet i think im getting closer.

I will reflash tonight and log again. I will report back.

no :( unless that is a typo

How would you describe load??

http://s4wiki.com/wiki/Load

Mass ingested/ mass standard. I see. Its a percent of The displacments mass of air. The more mass flowing through The motor The more load.

If the motor's VE were 1.0, and the IAT was standard temp, 1bar == 100% load

VE stand for??

Last time i thought i hit limp mode, well im pretty sure i blew up my maf sensor. Looks like the throttle plate went open for a split second and boom.

Maybe for safety i should start with a bigger maf housing and scale that. This throttle cut is killing me.

Please stop tuning until you read at least one EFI book.

You are nowhere near being able to do any of this. The problems you are seeing have absolutely nothing to do with MAF (which is also a problem)

Why then when i flash the stock tune it runs like shit until i unplug the maf? 

I said the MAF was also a problem.

At this point you are going to see a zillion different problems. Don't assume they are all because of the same thing :P

Okay. So which problem should i tackle first?
Throttle cut because requested load is not high enough
MAF i think is blown and housing should be larger n maf should be scaled

possible issues via wiki
-maf will max out at 220g/s which im almost at already (would not cause throttle cut however will put me in limp or blow sensor)
-KFDLULS could be kicking in for overboost protection. (dont think it limits requested load tho)
- KFLDHBN charge limit pressure ratio (this could be capping my requested load)

Requested load is supposed to follow LDRXN at WOT. I should go back to this table probably.

You should learn the theory behind what you're doing before putting it into practice. Right now, you're changing things without understanding them. That's a recipe for disaster.

Yes i believe you are correct but i have been looking at this stuff for ever trying to understand it. There is so much i thought if i start in one spot i could progress that way. I have learned a ton in this thread alone.

I'm just saying, read as much as you can. I have a better than most grasp of how ICE's operate, and I still spent a year reading before I touched a car.

I got you. I will keep reading  :-\

That makes me feel a lot better about my lack of mapping progress!

one of the bi pipes had popped off.    ;D

It all makes sense what happened know.

Also what happens when KFMIOP's x axis is not scaled for the same load as LDRXN. What % torque will it choose in KFMIRL? Will it just default to the largest load in kfmiops axis?

Is that all?  ;D

I ave played around a lot with these maps to raise requested load, i havent gotten it to move a tad. I have gone back to scratch a ton of times making small changes in hopes req load will move. I cant get it to move at all. Any suggestion at this point?? kfmirl is requesting enough, ldrxn is not limiting it. kfmiop I have been logging to try and make sure im not getting torque intervention via requested load cut. STILL requested load doesnt want to move at all. Is there another map that could be causing issues??

BTW 100% pedal doesn't translate to 100% req torque in IRL.

Thanks, pedal goes through kfped to get req torque right? So how is mrfa made?? Is driverrequestedReltorque mrfa?

This is what im looking at. Im just trying to keep mrfa<mimax

I believe this is better. Should insure i dont get requested load intervention.

Fixed kfmirl in some areas of trouble and finally!!!!!!! And in second gear injector duty cycle hits 115  :o :o :o
I capped ldrxn to 175 for now and will have to get fuel pump and injectors migrated now :(

If you folks are still down to help after a million dumb questions......The wiki gives a starting value estimate for KRKTE. Im trying to find good starting values for TVUB. It seems as tho there is a vast spread on what people are using for these values. Any rough guideline for these. 1000cc ev14 injectors im thinking about starting with these values, just suggested ones in the migration thread.
  2.23
  1.49
  1.10
  0.80
  0.69
Obviously these will change instantly but is it even slightly reasonable for a start?? Thanks

Only latencies I trust are from independent analysis. Start with whatever you want, chances are it'll be fucked-lol.

I'm working with some ID's now, and they state the specs on their site. Not even close.

Thanks DD, at the point im at would you suggest trying to get the injectors dialed in now and then starting completely over when i go to scale maf. Or scale maf now and keep tuning. At some point i will need to apply the 5120 hack, is this hard to apply later on or easier at first. in that thread there are some bins that are complete, i could start with those. Whats your suggestion??

Get the injectors done so that fueling is good. Use FKKVS. When that's done, dial the MAF in until fueling is once again good. Use KFKHFM.

I suggest reading up on the fkkvs fixer thats floating around here. You'll need it.

Not getting much when im searching it. A program someone made comes up lol people set it to 1

I am guessing I tune TVUB KRKTE until my long term fuel trims are near zero. Then play with FKKVS to get short term fuel trims close to zero?? Its hard cause when i search there are lots of conflicting threads.