MSefi.com read only forum (Jan.15,2018)

I have just scoped a HEC 716 Bosch coil. designed to replace older electronic ignition coils.
I found 5.5 ms entered in mega tune at 13.5 volts running was just to the end of the saturation ramp.
I will pick up a inductance meter in a few days and see if the maths shows what I saw on the scope.

I have solved 1 of the 2 misfires. I have fixed the major boosting misfire, since I went away and had purchased an oscilloscope I decided to use it. What I found was the dwell time which was not misfiring before at 3.5 ms when boosted would. Since lean mixtures are harder to ignite and plugs aging ...

I have re flashed and re configured from scratch. Attached are the msq settings for 2.888a and a log as you can see in this one single markers are a miss and groups of markers are very bad missing i described earlier. I was hoping 2.888a fixed the ignition issues.

yes, always one of the first things I scramble to check after first successful firing after a firmware change.
I will re flash and start from scratch. The misfires seem to only be there after full warm-up. However I cannot see the setting that affects this in my config. Certainly not to the point ...

I started with low boost to. The strange thing is if I place the ignition back to old vr / vrmodule (no ms controll at all) the car drives fine. as bad injection timing is noware neer as critical as ignition timing.

Update, the bad misfires are still there, the accell changes helped only for accell. I am hoping someone out there can help with the MSQ. I unfortunately did not have my laptop to take another log. It was quite warm today.

Drholl, Thanks, we posted the same time :),

The explanation of accell values makes sense now, 1540 was a pretty high % and is what was throwing me, the change to % opening I thought was a good move.
I think the random misfires are ignition related as when I run the dizzy to control advance ...

I tend to confuse my self faster than understand lol.
Attached is the default settings for the accell wizzard. I will try changing the value (ms) to zero and see what happens.

Edit # I changed the values to zero and also map dot threshold to 200 and it's a lot better, However it still will misfire ...

Sorry for the delay, I have been rolling out a hyper-v conversion of servers at work and have been concentrating on that migration.
I have today updated to 2.888a firmware and have taken a data log. I have not tried the accel changes as the default setting go past 100% on the first box to 1540 in ...

Hi devastator thanks for the reply, I will check again the accel for map, the turbo does boost very quickly. There is virtually no lag and seems to be rapid boost related. The cro I got is a usb one for a pc, 40mhz dual trace, and was only 450 aussie dollars, cro is the generic name for it since all ...

Sorry for the no reply, I have just returned from a long drive to and back home from my brothers wedding, My issues changed priority from this weird mixture issue to miss firing. Input was sorted after purchasing a cro however the misfires persist but at least I know the signal to processor is clean ...

Here we have a disagreement, not uncommon in forums. As your going normally aspirated it does not matter anyway. A standard 1/1 regulator will be fine.
If you decide to go boost I would see performance shops to get a idea of what they do. The advice I have received has been use a standard reg. this ...

Yes it is. Above was an example.

Rising rate would add more fuel pressure than just keeping the pressure difference the same. This would cause ve's to flatten out as boost came on. I believe these were designed for systems without control of the tune. I would continue to Google / call some performance shops to see what they ...

I have set up the tables so the load points encapsulate the idle area.
I,e. 800 rpm and 1100 rpm points, and 20 and 50 kPa. Map at idle is pretty stable around 45 kPa and advance is steady. Pulse widths are fairly stable to. The problem I have Is best described this way. Say you tuned for 14.7 ...

I have the ve table set up so the values are stable around idle, the duration and pulse widths are the same in both 15.5 to 13.5 swings in mixtures. The car runs differently suggesting the o2 readings are correct. And under load the readings are always the same.
I have tried varying injector ...

With Mega squirt and the Ve algorithm you don't need a rising rate regulator, In fact a rising rate regulator will make the ve table look weird.
A good manifold referenced regulator that is 1 to 1 rate will work well. Just be wary of cheep regs and the total horsepower of your application and ...

I have 2 issues that I am trying to figure out. The car is running well with 2 exceptions.

1. wandering mixtures at idle. I have all corrections turned off and I am trying to get the base ve right, I have a wide band o2 (Techedge).
I have the Injector opening times drilled down to 0.8 and ms/v ...