kzimmer

Are you sure the correct vehicle is chosen? Maybe re-load the vehicle? -Kole

Balls. So there isn't really a way to compare without a doubt how much fuel one truck uses compared to another with different injector nozzles.

Yeah that makes sense. This is unrelated, but what would happen if you commanded a fix value for canbus fuel? Would the truck idle like crap?

That's what I mean. Every truck should need X amount of fuel to maintain 800 RPM. With respect to fuel being burned, your X and my X should be the same. So let's say you have stock injectors. Your X is the X for a stock truck. X = final injected fuel amount at 800 RPM. Y = commanded fuel at 800 RPM. Say your X = Y because you have stock injectors. I also have X = final fuel injected at 800 RPM. But my commanded fuel at 800 RPM = Z. Knowing that X = Y, we can solve for my Z. This could be the calibration procedure for final MPG on your truck to match my truck. Thoughts?

The base tune used to allow the quad to take over immediately with I believe 1% TPS. For autos it was fine. But for manuals it causes issues with the factory anti-stall feature, that is affected when quad takes over. So Nick changed it so it was based on RPM instead. Solved that problem, but as these things usually go, fixing one thing often affects another. And the "another" was definitely the lesser of two evils and only affected people like me who put injectors in that were way too big, haha.

Is there a way to calibrate this for different size injectors? I wonder if you could use a known amount of fuel injected at 800rpm idle while up to operating temps to calibrate a larger injector, since you can likely know to a certain degree of accuracy how much fuel every truck will use in that situation.

@Me78569 You nailed it. Thanks man. High idle smoothly ramped from 800 to 900 rpm immediately, starting at about 116°F ECT. In 3-4 minutes, 134°, it ended up at 1200 rpm. I'm curious how it's going to work when my ECT's are at -20°F, haha. Neutral 3%tps rpm is about 950, 4% drops to about 850. Doesn't bother me and is not really noticable unless it's intentional. While driving I couldn't make it act funny even while trying. I'm very happy with the change, thanks again. Just need someone to see how it works on a manual?

Was that maybe just for common rail trucks?

Thanks for the tune @Me78569. Working all the way through the weekend but I'll find some time to run this.

Awesome, good to hear.

I would see if I could get the pinout of the bluetooth connector from Quadzilla. And then disconnect the adapter, check for appropriate voltage on the connector to see if it is being powered up. If not, you can probably blame the harness. With a full wiring diagram you could also check for continuity between the main harness plug on the adrenaline to the bluetooth connector on each pin.

At least we know now. And knowing is half the battle.

Being that my injectors are so big, I would have thought it would over fuel instead of under fuel. What about the changes a while back where it would use a different value for canbus fuel while driving in warmup mode? Back in the day it was lvl 0 while driving in warmup mode, but trucks like mine would get too much fuel while driving during warmup mode. Wait... so when in warmup mode, high idle probably jumps up high enough for the quad to take over fueling, and probably sits at my 0psi canbus fueling limit of 66%. @Me78569 This might be related to my RPM hunting issue.

As soon as I fix the data log export issue, haha.

I'm going to have to get back to you with a definite answer on that. The wife's been driving my truck since I sold her SUV (oops). I can idle around at a half decent pace and only need 3-6 TPS % to crawl along at a half decent pace. I think this likely translates to somewhere in the 950-1100 rpm range. Likely exaggerated because of the hunting.

Careful with the battery removal. Do your homework. Battery might be a 3, 4, or even 5 wire. Most of these batteries now have temperature protection circuits and sometimes other extra fault circuits. If you only apply voltage to the tablet and nothing else, chances are it won't power up. Also if you mess up the wiring of the fault circuits, there might be some self-sacrificing circuitry in the tablet, and it's game over.

That's the mystery, and it sounds like not all trucks report this number directly. @Me78569 you based load pretty much with 0-4095 canbus fuel, correct?

Only if automatic is selected in settings?

Factory bodies with Diesel Speed Shop 7x.014 VCO. That's worth a donation right there, lol.

I meant drive by wire cruise control = electric cruise control. Quad takes over with tps OR rpm.

I keep coming back to TPS > 0% OR RPM > X RPM, of course for automatics only. Should take care of the DBW cruise control.

My bad, I forgot, you told me this before. No prob. Light throttle, as soon as RPM reaches over X RPM (we tried a few tunes a while back and I cant remember where we left off, 950 rpm rings a bell), quad takes over, and since my 0 PSI canbus starting point is about 66%, fuel levels for Y% TPS drop, RPM's drop, quad lets go of control, fuel for Y% TPS increases as quad does not have control, equivalent of 100% canbus starting point, RPM's raise. Rinse and repeat. It's very noticeable and i've had people look my way in parking lots with "wtf" written on their faces. Will do it idling or while driving slow, parking lot, residential neighborhood on turns, etc.

That's an interesting thought, I forgot about the trans selection parameter. A chance to make everyone happy perhaps, haha. I would think for automatics, if the quad took over as soon as there was a tps signal everything would be happy.

@Me78569, it's not a huge emergency for me, but have you put any though into a way we can resolve the low rpm low tps lope of larger injector trucks starting at a low canbus level? I liked before when the Quad took control right off idle, but I understand that this causes issues for the manual guys. There's gotta be a happy medium.

If money was no object I would hop on a dyno and play for an entire day. I wish there was another way to get reliable steady state load. I don't care much about the horsepower/torque measurements. I just want steady load to take measurements and experiment.