vF Tuning for Manual Transmission 3rd Gens

Party pooper

 

I'm your huckleberry.

Flashed my truck with 04B42 .cuw last night, and if anything it's a good reminder why we tune these things. UGH!

 

Frank finally gave in and applied the TSB

 

Yeah, for science!

Lol, man I forgot how disconnected the throttle is on a stock calibration. No surging 2-3k though, which isn't surprising given how Camry the response is now.

Not one, but two condoms is all I'm gonna say.

 

You can always play with the stock calibration.

I wouldn't mind seeing that ignition and throttle efficiency tables vs b41

 

Just copy pasta all the tables. Whats the worst that can happen? Still gotta be better than 04b10

 

I have 04B42 Unlocked and can toss them up later, if @MOC221_ doesn't beat me to it.

 

I'm just curious if they mirror what you found in 04b04.

And he said no surging, now I'm tempted... But I'll wait

 

That was my plan to look at.

It'll be about 7p or 8p you're time until I can get to it.

 

not in any rush, whenever you feel like it is fine.

 

Sounds good.

 

I added 04B42 Stock screenshots to the ALC thread. Identical to the other Stock / unedited OVT maps:

 

I made some changes based off logging the last couple of days that has "seemed" to improve some things.

First, i noticed that during the lumpy feeling, my knock feedback was going to between -4.5 and -7. rpm range 2k-2500.

Above this was going to -3 to -1.2.

I made a change to the ignition and throttle efficiency tables that felt pretty good, but i was still getting a feedback of around -5 in those ranges.

I took some timing out of the 2000 & 2400 range on the low knock direct and port tables at 73% load and today this range is around -3.5

At the 55-60% load range i'm still hitting -4.5, so i took a degree out of the 4 cells that intersect there and will test tomorrow.

I also changed my ACIS low to 3200rpm - i noticed that it only activates under certain loads, id say the "breakpoints" are load ranges???? Anyway, i moved it there to get it out of the range for testing purposes, but actually kind of like it. I notice ACIS low only registers around 18% duty cycle on the ACIS motor, whereas the HIGH reads at 100%. Im guessing this means that ACIS low is a partial open state rather than full open.

The next thing i noticed was that i was only hitting 70-80% load at full pedal in the 2-3k range, and only 87% at anything higher. I would occasionally hit 92% load at some rpms ranges.

I modified the Throttle request to airload map to increase the values across the board. Still a similar curve to my last edit. Now i hit 88% load in the 2-3k range and can get over 90% else where (still cant hit anything higher) - I see the auto guys can hit those higher load ranges, so id say my limits are somewhere in my previous edits- so i added some more to the ATRTA and will test tomorrow.

I also found the range in which i cruise around and left those intake valve values the same as stock, but increased the areas above that, i feel i get better throttle response with more advance in lower load, but it killed gas mileage, so im trying to find a "balance"

And lastly, the 1500-1800 rpm *KICK* - well that's just a good old fashioned misfire. Im logging between 2 and 5 misfire counts in that range when the severe kick happens. I unfortunately have no idea how to correct that at this point. The trigger seems to be when transitioning from no/low load to high load (hard acceleration) Usually when sitting in second gear and hitting an on ramp to the interstate, or when someone has turned off the highway in front of me. Im guessing this is something in the form of fuel cutting back on, or the ignition advance changing from 45 degrees (where it usually sits) to around 8 degrees (where i notice it is at that point in high load) Unfortunately, the acceleration is so quick at that point OBD fusion just doesnt update fast enough.

With all that said, these things probably vary from vehicle to vehicle, gas station to gas station, etc. I also only seem to get these problems in the afternoon. In the morning when the air is cool, it runs pretty darn good. In the afternoon when it warms up it changes for the worse.

Here are some map photos. They are all comparison maps between my current and OV tune's / factory depending on map

Ignition and throttle efficiency, all i did is copy the .99 lambda into the .82 lambda. The thought here was, higher values = less request. and looking at the .99 maps, the ignition was LESS requested in the problem area and the throttle was MORE requested. The original map (besides being jumpy as shit) was requesting MORE timing and LESS throttle. Im having enough trouble with knock feedback in that range and dont want MORE timing.







Timing, highlighted the changed values



ATRTA- Similar to before, but slightly different, its basically the bottom 4 rows of stock, slightly modified



Intake valves - Lower is still factory, under low load and light throttle it sits between 0 and 5, any where above that it advances and gives me a much better throttle response (I THINK)



*Disclaimers are getting popular around here. Do what you want with these and i accept no responsibility or liability for the use of any changes found here, i'm simply sharing this with people who might care, my wife really doesn't give a shit*

 

Yeah, misfires have become my enemy.

Had a horrible buck in second gear getting on throttle earlier, but i had fusion open. Registered misfires during.

All of my misfires happen during low load and low throttle or transitioning in the throttle.

 

Just curious as a point of comparison. Were you seeing misfires on the unedited tunes?

 

Don't know, didn't have fusion so wasn't checking.

However, the bucking and such has been present since new

 

Thanks!

The bucking sounds like a true misfire also. A lot of misfires on other Tacos are just something the knock sensor picks up from another source. @OVTune had a good explainer on this a while back. It calmed down all the misfire conspiracy theories.

 

Yeah I'm not a theorist.

It registers misfires a lot but i don't feel them.

But it always registers one when i get that buck or kick.

The first picture was at low load 4th gear just cruising the highway and all the sudden the truck just shakes, almost like a rumble strip.

I didn't capture the big buck because i was accelerating in traffic and not keen on using my phone while driving in traffic. All of my screen shots are done with the swipe shortcut

It's always at low load and throttle, I've not had one come up in any other circumstances.

 

Yeah. It sounds like you are feeling that contrast. Sucks though.


Monitoring or logging while driving is never fun. A remote trigger would be a very nice gadget.