Kennyx wrote:Print screen and post the miss fire , please .. i have hard time to determine it ..
Have you ever check spark power by visual... strong ? Sometime it can be the ignition cable..you running on COP or distributor ?
Kennyx wrote:Try load this msq and test.
Kennyx wrote:How is the spark energy power look like ? strong blue or yellowish ?
You change a new set of ignition wire ? I thought you are running on COP ?
jsmcortina wrote:Why are you using four spark outputs from the MS3X for a two coil wasted spark system?
Why not just use BIPs? Simpler and known to work.
kizzoalfa wrote:If I choose wasted spark as ignition mode will full sequential injection run or just semi seq.? If will work than which MS3x outputs will drive ignition SPKA and SPKB for the wasted spark?
jsmcortina wrote:kizzoalfa wrote:If I choose wasted spark as ignition mode will full sequential injection run or just semi seq.? If will work than which MS3x outputs will drive ignition SPKA and SPKB for the wasted spark?
It will do just what you ask it to do. Although dwell overlap would require very high dwells and high rpms, your circuit is "cheating" the code and un-supported.
Please set wasted spark and disconnect SPKC and SPKD.
You can also then remove the diodes and ensure your driver chip gets a full 5V (looking at the datasheet this looks fine as it is, but it does remove one small uncertainty.)
kizzoalfa wrote:I understand that it is cheating the code but in my understanding it should not be the root casue of my problem. Do you agree?
Today I made some current measurements in the car regarding Injector currents and ignition coil currents.
I checked all 4 injectors, all of them have near the same injector current waveform. I attached one of them.
I also measured the igintion currents, on various engine revolutions, current remained the same, no change, no effect of RPM on the ignition currents. (I checked both coilpacks, they are identically the same.) I attached some waveforms as well.
After some measurement I decided to increase dwell time, I increased the idle dwell time to 5,5 ms. The coils started to saturate around 6.5 ms, so I decided to use 5.5 ms.
I also removed O2 sensor again and did a free air calibration (sensor was cleaned by some low pressure air before calibration.)
After the tests I started to drive the car by enabling VE analyze live to create some base VE MAP after the O2 recal.
In the attached log you can see the rough finish of VEAL. (The result is interesting in the focus of the datalogs: somewhere I have not the AFR targets I want - like I have somewhere 1.5 and should be 13.8 - however VEAL was running but by some reason did not optimalize the VE table.
As far as misfire, I found some interesting thing again: it never happen under heavy acceleration. In the first attached LOG011 you can see that I did some "harder"acceleration, 1st, 2nd, 3rd and stop in the traffic and did some lighter acceleration, 1st, 2nd, 3rd and in 3rd aroun 3400 RPM I had the 1st misfire, you can see RPM start oscillating.
Then I decided to drive back to my garage and in 2nd gear around 2400RPM it happened again during light acceleration. (LOG012)
Does it possible that I have some lean issue while accel is just mild and not hard? I checked valves, compression they are fine. Spark gaps are fine, also spark energy looks enough.
Can you please take a look into my attached two logs? MSQ is attached. I use the new accel pump which work more realistic that the traditional mode.
Kennyx wrote:The problem now is .. im not sure how reliable and how proper the dwell timing to set on your ignition system...you can tweak it little by little if you have enough free time ... anyway, if you suspect the O2 will disturb your engine operation ..you can always disable the o2 correction before run .. judging from your fuel VE table .. i dont think it is cause by fuel .. i will more focus on the ignition system if i were you .. And i forgot to ask you .. is your exhaust gas looks good ? any blue , black or white smoke comes out from tail pipe when you rev up the engine ?
Kennyx wrote:Select no correction in EGO Control , do you have oil catch tank in between engine and intake manifold ? disconnect the hose from valve cover and seal the hole on the intake manifold temporary for a few test run...We will see whether your engine is drawing oil from valve cover or not, beside piston ring or valve seal.
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