Hello all,

I'm going to go through the process of remapping my ECU in open loop mode. I'll probably have to finish this post with a different account because I got locked out of my email when my phone died, and I thought I was locked out of the forum, but my computer remained logged in. somehow it remained logged in even when it was off and transported to another area and connected to an entirely different internet connection... I do not understand how computers connect to the internet, nor will I ever.

fun fact: my password is one of those randomized codes that gets sent to your email when you need to reset the PW. i never reset the password and kept the randomized code in my clipboard on my phone. I see the error of my ways now, thank you.

Disclaimer: To those of you thinking about commenting "you wont see much gain... waste of time... can't do it...etc." go kick rocks.

I have scoured the web looking for anyone with good luck tuning the 2uz-fe and while it has been done, nobody is sharing how or what they did.

I may someday figure out how to work with the closed loop, but yesterday i changed a value from 10 to 9.4 and my long term fuel trims jumped to 20% clearly i wasn't working with the closed loop properly.

Hardware setup:

2uz-fe with doug thorley shorties, high flow flowmaster cats x2 (1 per bank) flowmaster 2.5inch y pipe, flowmaster super 50, 90 degree dump straight down before the axle. 4Runner weighs 6000lbs

35x12.50 nitto ridge grapplaers on steel 17"wheels (dear method race wheels... i'll put the biggest graphic anywhere you want if you hook it up, bruh please)

URD MAF calibrator soldered in correctly.
Innovate motorsports DLG-1 kit with Bosch LSU widebands.
Ultragauge (this was a bad choice as it has no way to interface with my laptop, but does indicate open or closed loop, and fuel trims)
4" stainless steel snorkel with impeller style precleaner (custom, thanks for nothing ARB)
AFE prodry-s air filter in stock airbox
sprint booster set to Red 9 on the road, off during rock crawling
stock fuel pump
stock maf sensor
stock injectors
naturally aspirated

Software:
Splitsecond R4 programmer
Logworks 3
Xbox app for windows 10 (for screen recording purposes, also the reason why the ultragauge was a poor choice, I cannot record the open/closed loop indicator if it isn't on my screen)

results: not much so far, as i'm still waiting on the cables to interface the AFR gauge with my laptop.

I altered the 11PSI collumn to 9.5 and this resulted in an increase(at wide open throttle) from 10.8-11.2 to 12.1-12.5 AFR The butt dyno confirms a positive gain in performance. Fuel trims remained consistent with stock operation.

So at WOT I have increased power. YAY!
the active cells jump around so much I cant keep track of it very well in real time. I have the afr on the steering collumn and the laptop in the passenger seat with me while the old man fails at keeping the throttle position stable.

road tuning has little to do with speed and everything to do with throttle position and engine load. This concept is foreign to him, and myself, so i think better results will be achieved with a driver that is used to this particular machine: ME.

Dad wasn't interested in learning what to do with the fuel tables, so i asked him to drive. I believe the XBOX screen recorder will help eliminate the requirement of a second, or third, person.

now i have to get my cables, and record a bunch of videos of me hot rodding it down the road yelling "open, closed, open, closed, open, closed" ad nauseum.

process:
This may change, and any input will be appreciated. my plan is to get everything synced up with my lappy and record videos of the fuel tables with AFR and me yelling, then go back and adjust the cells that correlate to an improper AFR.

my goal is 12-12.5

maybe i won't have to yell open, closed et cetera. because if it isn't 14.7 (really 14.5 - 15.2) it must be in open loop, i think.

post dyno results or

By the way, it doesn't sound like you are reprogramming the ECU at all, it just sounds like you are merely changing the input parameters, which does not match your post title.

like i said, kick rocks.

maybe go figure out what a google is and learn yourself the term "remap"

I road tuned a Buell like this once except since I was riding it I had no visibility until I came back and looked at the datalogs. Ended up taking about a month of every night playing with it for a couple hours. In the end I'm not sure if I increased power at all but I for sure increased driveability which was the main complaint. If it's power you're after good luck, dyno is the only place for recreate steady state conditions to tune even the coarsest of table.

Like I said...

Go spam somewhere else.

sure would be easier with a datalogger, im basically using my laptop in lieu of one. unfortunately the remap is going to the back burner thanks to a busted main seal. Oh well, life goes on.

im going for better fuel economy around town/on the trail. the AFR gets down to 10.2 in some cases; that's just a bunch of wasted fuel. Based on the research I've done there is only about 10whp more to get out of this thing without forced induction. that might equal like 8lbft of torque.

I've seen reports of a substantial jump in mpg's after properly calibrating the fuel tables. right now I'm at about 12-13mpg. I'd be happy with 15 in town, or more.

I definitely got more power at wide open throttle going up from 10 to 12 AFR.

this doesn't appear to be the proper forum for engine management. tons of writeups on installing 8bolt roof racks though...

I have absolutely no meaningful information to add to this, but please know that I find it interesting and look forward to updates.

I cant tell if this post is a troll or spam its self?

Are you familiar with engine tuning?

Hey, don't let that guy get you down. Im keen on your progress and have been looking to do similar tuning work on a 05 v6!

I am more than familiar with ACTUAL engine tuning...not "remapping", which is what people who can't afford any real equipment do. If you are not completely reprogramming the calibration file and manually mapping fuel injection and timing points on a PC with a standalone engine management computer while simultaneously monitoring A/F ratios, lambda and spark clearances at different throttle points on a dyno, you are not doing anything.

Also, if you cannot conclusively prove on a dyno that you have increased BOTH horsepower and torque at all calculated loads, what was the point of even trying? Just want to feel cool? 10 million internetz pointz?

I hold the record for the most horsepower and torque on a supercharged CA smog legal 5vz-fe which was confirmed on a DYNO -- so yeah...I might know something about engine tuning.

< there is your prize, or did you want a cookie or gold star?

How much power/torque did you end up making?

How much hp/torque were you capable of making?

Yeah, I dunno what kind of gate keeping this is, but not everyone can afford to dyno a car for days/weeks. For some this a hobby that you can adequately estimate gains based off "butt dyno" experience or simply from inferring from out putted values from the ecu.

Not only do you not need to do any of what you stated to be "tuning" but you need to tune your attitude (and you don't need a dyno for that)

Tuning is a word reffering to changing something to bring it in alignment with something else for a particular goal. You tune your AC's cold air output by pressing the higher air flow buttons. A tune on a car can simply be advancing timings on a map, it doesn't need a stage 2 mod setup with a custom after market ecu chip and 12 ecu profile maps. (I've tuned 10 different Cars across 4 different manufacturers, and on only 2 did I use a dyno) . Not everyone is going for rally racing man

But I'll give a 3/10 cus you got me to reply to your troll post.

I'm in the dyno camp somewhat.

Butt dyno means nothing to me. If I wanted to tune my truck there is no way I wouldn't do a before/after to actually measure the gains.

If you can verify gains through a dyno run then you could get a lot more people to follow this mod.

But if you want to have fun and tinker with something then go ahead, I'll munch on popcorn and watch either way.