TuNiN n00b Exp -Cpl n00b ?s

[entity-unknown]

Happy Independence Day! I realized my questions are "not ready" and I need to pay attention to finishing the basics of the tune. Also changing the MAF did stablize the #s more but I see in the Decipha's tuning dox, he explained the averaging of the rows already ;)

I've gone back and started to re-read all the basic tuning dox Decipha provided and now that I'm not a 100% n00b, it's all making more sense and some steps I didn't fully understand so there was still more to do. Still I'll prob have to run thru these a couple more times as I continue to dial in each phase.

Thank You again Decipha for all this wonderful knowledge and work <3

[decipha]

cool no prob sounds like your making progress

if you want to read the comments on something just hover the mouse over it or select it and press F10. Either will show you the comments.

colors are giving you a visual representation of values

[entity-unknown]

Thank You and I've seen the comments in the def file too, even read a few ;)

I got the idle tune down nicely overall but only had 2 heat cycles so far (AZ) and followed all your steps for the mechanical. I did have 2 issues with the instructions I hope you can clear up.
1: From your Idle Air dox: "FN800 Allow 0% ISCDC at 0 lbs/hr, remove clip of 10%, Clip max ISCDC to 98%, reduce 100% values"

The measurement is in lbs/min not /hr but ultimately I don't understand the 0%, 98% & the values are all 0 except the 1.0. Maybe I have diff #s? Here they are and I've never changed these myself directly:
lbs/min ISCDTY
0.000 0.00
0.000 0.00
0.000 0.00
0.000 0.00
0.000 0.00
0.000 0.00
0.000 0.00
0.000 0.00
0.000 0.00
0.000 0.00
1.000 1.00
16.000 1.00

2: I have FN1861 but not FN1862 but I did divide the table so the upper left item was 0.172 as directed but I had to divide the table by 5.7 to reach that value, not 6. Does this look proper?
Original values from A9L2:
-40 0 40 80 120 160 200
0.984 0.984 0.891 0.734 0.656 0.625 0.594
0.984 0.984 0.750 0.688 0.594 0.547 0.500
0.984 0.922 0.719 0.625 0.547 0.438 0.375
0.969 0.812 0.672 0.625 0.531 0.344 0.328
0.891 0.750 0.672 0.625 0.516 0.328 0.219
0.891 0.750 0.672 0.625 0.453 0.312 0.172

New values after divide by 5.7:
0.172 0.172 0.156 0.125 0.109 0.109 0.109
0.172 0.172 0.125 0.125 0.109 0.094 0.094
0.172 0.156 0.125 0.109 0.094 0.078 0.062
0.172 0.141 0.109 0.109 0.094 0.062 0.062
0.156 0.125 0.109 0.109 0.094 0.062 0.031
0.156 0.125 0.109 0.109 0.078 0.062 0.031

One notable about the MAF Idle tuning was a tiny adjustment really does make a huge difference :) Making tiny adjustments say by .1 was not possible. You have to go up/down about .3 and it'll round to the nearest value. I gather this is somethin to do with hex values but either way, just a notable I learned here and in a few other values so the lesson is always Save your edits, then re-check them ;)

[decipha]

you dont have to do amy of that its already done

[entity-unknown]

So the FN800 table I pasted in is OK? I took it as you said I should restore the FN1861 table to what I posted as the Original with 0.984 in the upper left so I did that.
I had this really weird issue after the 0.172 table. It idled and ran just fine till I hit a steep hill then after that it'd idle horribly. Shut it down and hooked up the laptop to record on the way home and the Fuel Error gauge would peg at lean at idle. A lil throttle and it'd be fine riding 1.0x for the Fuel Error. Only had two runs like that but restoring the 0.984 table had another good run this AM.
I'll test the hill again soon to see what's up.

Thank You again!

[decipha]

idle air has no affect on fueling if it does then you have a leak

[entity-unknown]

There's definitely no fuel leak. That'd be exceptionally obvious in so many ways including just smell. This issue occurred only after making that "new table" adjustment for FN1861 w/ 0.172 then hitting the hill i.e. heavy load vs. the "original" table w/ 0.984 which I put back. I haven't hit a hill since the "Mechanical Idle Change" either but I think the table is relevant, NOT the idle stop screw setting. This specific hill is offroad and VERY rocky so I'm climbing the hill in 4x4 Low Range gearing about 1-5 MPH so the Load (and other things) are significantly higher than normal circumstances but it happened within 2-3 seconds of going UP the hill and continued until shutdown, no issues goin down that hill tho and I've hit that hit up/down several times during the last year+ of tuning w/o issues.


This is similar behavior to when the MAF table was extremely skewed when I first started tuning last year and would hit a hill on the highway at highway speeds then it'd move to some "default table" and continue to run more and more lean as I got further UNTIL I shut it down and let it sit for 15-30 minutes. Otherwise I could hit the highway for miles as long as there was no inclines for say more than 1,000 ft. Now w/ the MAF table tuned pretty solid, I can hit the hills at highway speeds with zero fueling/error issues.

This is a 4x4 big Bronco built for offroading w/ all the torque for the cam pushed to the low end but still be able to hold 80 MPH for lengths of time for the highway, just no chance at passing someone at 80+. So the usage and power ranges are the exact opposite of a tuned Mustang. That's one reason why I keep asking about Loads as well because an offroad truck's Load ranges vs. a street/track Mustang would be fairly different I'd imagine too.

Either way I'll hit the hill again and do some more testing and see what all happens :) It's AZ in July so time between heat cycles is forever... I should have EEC Analyzer today or tomorrow so we'll see what insights that offers too.

[decipha]

well yeah not a fuel leak an air leak.

[red5.0fogger]

the rock crawling at put put speed is a new wrinkle....

[entity-unknown]

Decipha - Def no vacuum leak either :) I've had this Bronco for over 21 years and I can' definitely say I know when I have a vacuum leak since I had those for the first few years I had it. All my vacuum lines are fresh rubber, real vacuum hose, new connectors, 1 1/2" stainless steel slip joints for each hose to connector, then every connection is sealed and heat shrink wrapped. When I installed the Ford Racing 347 stroker, I made sure I wasn't f'in around with vacuum leaks for at least another decade :)

In terms of air flow issues tho, removing the 2nd cat has been on the list because it reduces to the stock output size of 2 1/4" with the pipe leading to the cat being 3" and I know with my new setup, the 2 1/4" is too small. It ran great for all tuning so I left it till now but I started pulling that yesterday and should be done today so TBD there too ;)

I don't have any leaks in the exhaust but the back pressure I do believe is relevant in some way and def an issue. How do I know I have no exhaust leaks? Hookin a shop vac in the blow direction into the tail pipe and sprayin down everything with soapy water does wonders so I took care of all those months ago (just clean out the shop vac hose before you do this) ;) If you use Copper RTV sealant to fix some small leaks (stuff does work great for it and is often used on exhaust gaskets as is) once everything is bolted up, run the shop vac in suck mode on the tail pipe and it'll pull all the sealant in so it won't blow out after it dries :)

Red5 - That's one thing I figure since I doubt any/many have tuned Decipha's A9L2 for my use case but I'm good for complicating things and doin things against the norm ;)
Mustang vs. Bronco, both would work a lot harder to climb any hill esp. at put put speeds since there's no momentum. The only real differences there would then be weight, gearing, and tire tread/size assuming engines/transmissions are equal.
I have 5.13 gears and I'm not the type to use throttle over logic offroading so I'm pushing about 1200-1400 RPMs goin up that hill, casual and smooth and it does great. It was once I got to the top and hit idle, that it went to shit but ONLY idle. As long as I stayed above say 1100RPM or let's go with the TP Ratchet is at 162, if I bump it to I'd guess about 180ish or more, it'll recover and ran great the whole way home.

Either way I'll go take care of the exhaust and maybe one of these CHGs will eliminate this "last" issue and maybe this "adventure" will help someone else some day too :)