Brice's NA V6 Build

[Ok so I got the STFT's working on the Xgauge and they are -6 to 0 so a little rich to perfect? I can't get them better than that. LTFT's were like 19 when I turned the truck off but I didn't let it read them for too long so that's probably not accurate. The view as AFR thing still isn't working correctly I don't think, but I forgot to test it with the SC2 setup to see STFT before I came inside.

-6 to 0 STFT occurred with an o2 voltage of 3.2 which should equate to 14.7, so maybe the stock ECU is under shooting fuel a small bit then richening it up?

I'm not so sure lol, but I think it's running better, except for at idle if you give it gas too quickly it bogs for a split second, idk why.

I'll be able to make some pulls tomorrow though for some answers and data logging.]
^^^^
This is from last night but I forgot to post it. I'm going out right now to datalog and tune

Oh and here are some pictures from what I was doing yesterday.




F-250 7.3L Turbo, non-intercooled work truck

Takes about 15 quarts of this (2 in the filter and 13 in the engine)

Oil for the Tacoma. The Mobile 1 was the least expensive synthetic GL-5 so I grabbed it.

Diesel oil in a gasoline truck lol...But hey 5W-40 is always a good idea with an oil thinning turbo, that's partially why diesel oil is a good idea since they usually have turbos, and that's what this synthetic is made for.

@Torspd Got that check valve put in there I did notice that the brakes are insanely hard to push when the engine isn't on with the check valve there vs stock which would still push relatively easily with the engine off.

Time for new diff fluid. I've never changed it, although it was surprisingly clear...

Metal paste/flakes. The flakes and paste were very thin and fine, so I wasn't worried and from what I see that's pretty normal.
But considering the build up, it's been awhile since the diff oil was changed. I refilled it with about 3 quarts, or until it ran out of the fill hole. I followed a how to and it said wait 5 mins or so for the axles to seal, so I did. When I came back it was still right below the fill plug (I could feel and sorta see it) so I guess its good? There was a minute or two between each bottle being poured in so I think thats why I didn't have it overflowing out the fill plug. Torqued the drain and fill to 36ft-lbs and yeah all done

All of these pictures took place yesterday or Saturday

 

Holy crap that's great...I kinda had the mentality of "eh I'll get it eventually on my own" but this is great...Idk Why I never saw this before Thanks a ton.

Off to tune

 

The short and long term trims need to sum to 0. If you have 19 LT you need -19 ST. ST is what will change as you add or subtract fuel and the LT is basically a running average of the ST over some extended interval of time and is added (or subtracted) to the base fuel map used by the ecu. With larger injectors you won't be able to get it perfect and you'll always have some unwanted afr sway. If you can get LT trims within +/-10 you should be good but it's certainly possible to get them down to +/- 5 with these injectors if you have the patience.

 

At the time I couldn't find anything to help and used a boomslang harness. Worth every penny IMO.....

 

Hmm so if I hold the rpms at 2000 and change the o2 values nothing happens on the wideband...This has no reason not to work...Maybe I'm not tapped into the o2 on the truck with the AEM? But that doesn't make to much sense either since it was kinda responding to stuff before...

 

Can you check o2 voltages with your scanner? If so make sure the one being altered is the #1, not #2.

 

Lemme see if I can get an xguage code

 

No luck with an XGauge...

 

My only guess is you tapped the wrong o2 wire. didn't you replace your sensors recently with non OEM? Might also be related to that

 

Yeah, I used a bosch...
I'm gonna go over some wiring stuff and see what I get..

 

My truck LTFT is 19... And my STFT never goes to -19. It just hovers around -5 to 5.

I thought the STFT is just the fuel adjustment the engine is making at the moment. That doesn't mean it should sum to zero with the LTFT.

 

It doesn't have to sum to zero but if you can it will help the truck run more efficiently.

In your case if you were able to adjust your STFT to -19, over time your LTFT would approach 0.

 

Oh ok that makes more since. So the LTFT is just what the fuel adding or subtracting from the base map, then the STFT is just the fine adjustments made to get your afr to 14.7 correct?

 

Yep

 

Well I think I'm gonna pull my harness back out and make sure I tapped the correct wire.... I should have tapped E7 13 so I guess I'll see if I messed up or not.

 

I didn't use "target AFR". I manually inputted voltages to the o2 until I achieved the AFR (according to the wideband gauge) I was looking for. Then went back and tuned the fuel cells until I got an acceptable STFT. FWIW

 

Yeah, My problem is is that my o2 isn't responding to voltage changes.

 

I gotcha... My notifications are weird. I'll get a notification for the first reply and then I won't get anymore until I go an look at this thread, and then I'm pages behind. You are using whole voltages 1-5v (since it's a wideband) correct?

 

Same for me as of recent, my notifications are just not popping up...At Least not the right number of notifications

And not specifically no. I was going up in small increments, but even at 1 volt nothing changes

 

Try 3v. Mine wouldn't change until I started getting much bigger. I wish I had my tune computer in front of me. I could tell you when voltage I am using for 11:1, etc

Your wideband only operating between 1 and 5v. The higher voltage, the lower the AFR, no? Or am I opposite?