I see usually around -10 to + 10 deg running down the highway, tuned or not... just trying to see if this is around where it should be.

 

Sounds similar to me, dont usually pay attention though.

 

Even my bone stock logs, seem to just wander wildly, without any correlation of throttle input.

I really wonder why that would have been intended....

 

wonder if it is for emissions purposes? I cannot see my timing with the IQ. I will have to check for updates and see if it is possilble.

 

I assumed it was for emission purposed, Till I loaded tunes and noticed that all the tunes also carry over this characteristic. Maybe they couldn't tune that portion of the programming?

Maybe theres a reason for it? who knows, but it is very intriguing to me.

 

I drove down to Vancouver yesterday (12hrs, 1200km) and when cruising along every time I looked it was at -4.xx on timing.

I also got 15mpg (14.99) on the first tank of fuel. Traveled 696km, still had about 18% fuel in tank when I filled up. And the outside air temp started at -10*c to about +10*c on that tank. Oh, and the pine pass through the rockies.... This pretty much unloaded and on spartan 300.

 

Really?! ... so not anything resembling what I experience typically.

BTW do numbers in the negative indicate before or after TDC?

This is making me more curious by the second.

 

I was just thinking here...

Even if there WAS a timing issue, the display shows what the PCM is commanding, not whats happening in real life.

Why would it command injection timing to fluctuate like that, and if there was something wrong, aren't these PCM's able to detect all kinds of errors?

 

I'll log mine for a couple of runs and see what's going on shortly... stay tuned...

 

I want to say after tdc but I could be wrong.

When you say it wonders, are you at a steady rpm & speed?

 

lol (-) = after tdc?

When I say it wonders, I mean that it seems to move around in a way that defies what you would think. Picture looking down, seeing 2.xx , ripping down the highway. Then you step on the gas a bit, and were around -8.xx. then you look down again a minute later cruising, and you're at -2.xx. Then you step on the gas again, and it shows 9.xx.

I have never looked at it hard enough to look at the pulse width with the timing, but mine varied between - 10 and 10 at a fairly steady throttle, enough to keep it at 100-105 km/h 60mph.

 

awesome!!!!

are you running a tune?

If not, is your truck flashed to the latest one, if you are do you know which version of the ford flash your tune is based off?

 

Thats a plus with computer controlled everything, it can adjust timing by the nano-second. Remember working on the old carb'd trucks, bust out the timing gun and retard/advance the timing and that's what you're stuck with.
This way it can adjust to all variables constantly.

When advancing timing it makes spark before tdc, right? I guess the question is does "-" mean advanced or retard? And does "0" indicate TDC? And I make the same correlation between spark and injection, between diesel and gas engines?

Im just thinking out loud here, I could be way off!

 

Which leads me to believe (-) Negative, is advanced...injecting fuel btdc.

 

Here's a snapshot of some slow stop-and-go traffic--more stop than go. The most throttle I gave it was around 15-20%--I'm driving like a grampa here unloaded today. Timing ranges about +15 to -5

When idling, timing sits at a constant +8.5degrees and torque is 88ftlbs. Whenever torque drops below 88ftlbs, I'm decelerating, the truck is in gear, and timing appears to go negative. But at the beginning of the graph, timing was negative while the engine is under load. I guess for emissions purposes??

The throttle position roughly corresponds to torque, so I didn't plot it since it clutters the graph

Now, I'm no diesel guru, so I don't know what to make of this.

I'm currently completely stock running the original 11B23 (before they fixed it). If I'm not mistaken, the tuner guys are based off of the prevailing Ford flash when they happened to start development on their tunes. I think they're based off of flashes from sometime in '08. One tell-tale sign is the DPF-on tunes running regen at 1200rpm while in idle or park. That was changed in more recent flashes.