john.z

10-10-2023 12-23-52 PM Log.teclog Here's that log, what do you mean?

I'm playing around to see whats real and fake knock, this is the first run where Ive heard a ping through my knock ears. Even so, they're always reading something above 0 at WOT, except for cylinder 1. Even throughout cruising with bumps and gear changes etc, the others will at some stage do something, just not cylinder 1.

Getting no feedback from cylinder one knock spark adder, reads only 0. The other 7 cylinders record fine. Any insight on what's going on there?

Can confirm 0-7 is cylinders 1 to 8 in a v8 and yes mine runs slightly leaner on one side, but it's the drivers side that does so since air flow is less obstructed to it, i changed 0-3 to 1.02 to correct.

Yeah that’s where I assumed I’d end up, much easier to work with a boost controller than going down the rabbit hole of a different pcm. We’ll see when the time comes, something about a fully factory pcm running everything just seems appealing

Thought so, shame they didn’t make a one size fits all pcm haha

How about going the opposite way and making a turbo ecu run a v8?

What’s the possibility with this with a turbo v8? (FG 5.4) Is it possible to add in the boost sensor and waste-gate solenoid? Or are the pins just not actually there on the pcm?

Yeah I’ve played with it, gone from .14 up to .20, but I think that may need to be higher as the log shows it’s hanging around .19 and when it does idle it’s around .25. yeah decel table helps a lot. Motor’s run in now so I can spend more time at idle figuring it out 👍

Did that, no leaks. Like I said, not looking for an answer to my problem, just looking into the transition from dashpot to idle. I want to know more about it as the transition has never been smooth, even when stock. For example auF2257 causes a 1.5 second delay where it will momentarily hang. Removing that lets it return straight to idle speed however the timing drops to -9° for a split second causing a slight overshoot.

Could you explain the transition from dashpot to idle control? what triggers the change between dashpot and idle control? Im having this issue where the idle hangs around 1500rpm. Idle status says it's still in dashpot, however the throttle has returned to it's usual idle spot. what's hanging the revs is the spark is stuck in the decel table and it catches the motor around 1500 by commanding 17 degrees advance. I can decrease that table to get it to go lower, however it wont drop below 11 degrees. Note that it is a freshly rebuilt 5.4 with lower compression, ported throttle body and different cam timing with rough changes to the throttle body flow map and speed density tables, enough that itll run within 5% of 1.00 in open loop at idle, but not enough to suggest that it's not my issue. Ive fiddled with a fair bit of tables and scalars between dashpot, idle and spark idle, nothing that eliminates the problem all together. Not looking for a resolve to my problem, just an explanation to my question above. dashpot error closed loop.teclog

For reference I found the problem, a common problem for the 5.4’s. Due to the drivers side secondary tensioner tensioning the wrong side of the chain, timing can vary a few degrees, causing a different AFR for that side. Flipped tensioner and decreeing the cams solves the problem.

There was no over rev or weird loud sound, until it went back to idle and started ticking like a lash adjuster sounds. basically what happened is I was playing around with it, got to 4K with 9psi. Let go of the button just before the throttle. The tune would have changed back, saw 9psi at 4K and immediately changed from -20° to 15°. You can imagine with that amount of boost, compression and advance, a free revving engine would struggle to roll over top dead centre. Stock rod just couldn’t handle it

Oops… If you’re testing this with no load on the engine (manual xr8), make sure you let your foot off the throttle before letting go of the button 😅

In the data logger log tab, you can rename your inputs. However, that doesn't translate into the graphs, which still show DLP1_EQU etc. Is it possible to change them on the graph too?