Lost sync reason Nr.2, L28ET

[Meguiars]

Hi i have a small question and that is that i get some Lost sync reason 2, not all the time but enough that it is enoying.
Can this be because i have the VR sensor on tooth nr 5-6 and the correct timing is set at 48* in TS. I have a suspicion that it may be a little to short time for MS to have enough time to calculate the TDC. It has been strobe lightend and it is perfect. The car is a straight 6, L28et Turbo. Do you recomend that i move the trigger wheel/sensor up to 9 tooth BTC instead or does'nt it matter when it comes to sync rerason 2.


Here is my MSQ and some Msl files.

NR2.msq

2014-12-10_15.45.00.msl

2014-12-10_15.23.04.msl

[elutionsdesign]

I don't see where the tooth #1 angle would have an impact on a lost sync, if that is what you are describing. Can you post a composite log showing lost sync?

[Meguiars]

I don't see where the tooth #1 angle would have an impact on a lost sync, if that is what you are describing. Can you post a composite log showing lost sync?

Yes i will make a log during tomorrow, by the way should i convert to EDIS6 system, is that more stabile ignition/spark system. i got 36-1 DIY trigger wheel with escort VR sensor. ang a IGN-6 coilpack. I have read alot now and it seems people are very happy with that, EIDS6 i mean.

thanx

[slow_hemi6]

No way. Once you get the set up you have now sorted it is much simpler and better than edis. You are probably just having a noise issue or need to tune the VR input.

[Meguiars]

No way. Once you get the set up you have now sorted it is much simpler and better than edis. You are probably just having a noise issue or need to tune the VR input.

Thanx, i will stick with the setup i got now then. At my work we have a nice Fluke Scopemeter, is it recomended usisng this while adjusting the VR. I have never used it thoug. lol, but some of my colleges probably know how. Is it the pot nr 56 that needs to be adjusted? I have read alot aboute it but i have to know what to look for, should Tunerstudio be online when im adjusting it so i can look at it live when adjusting.

My main worry actually is that it only has 48* Angle before TDC and as mention before i think it it to small amount of degrees, maybe a good idea to put i on tooth 9 or 10 or so. Anyone got any experiences when it comes to that.

Thanx for all of the help in this forum, specialy when i am a newbee when it comes to Megasquirt. Im not regreating a second anymore that i went for this system.

THX for all of the tips.

[slow_hemi6]

With the MS2 or MS3 wheel decoders that is not an issue. You could have the missing tooth 10 degrees before and it would still not be an issue.

[Meguiars]

Ok then i dont have to worry aboute that then,

But lost sync reason nr 2, isnt that MS doesnt see the missing tooth or something?

[slow_hemi6]

It means it (missing tooth) does not happen when it expects it to. So with regards to the pattern it happens too early or too late. If noise is giving a false trigger then it will happen too late, ie it will over count triggers before the missing arrives. If it is just not picking up teeth then it will under count before the missing arrives. Either situation will cause a sync loss. So you can see noise is your enemy and incorrect tuning of the VR is your enemy. This VR tuning I am talking about is having the wheel run true, having the sensor correctly positioned over the wheel with the right gap, having the pots set right, having sheilded wire and grounded at only MS end shield and sometimes if the VR is actually producing too high AC voltage you have to include some extra resistance into the VR wiring. I like my hall sensors but there are plenty of posts on here about getting the VR's to work well.

[Meguiars]

Shouldnt the VR sensorcabel that comes with the MS-Loom be shielded enough, but when i comes to think aboute it the VR cable goes pararell with the Spark out wires to my IGN-6 Coilpack in the engine compartment. Is there a good way of shield the VR-sensor wire with some silvertape or simulare? I Dont want to move the vr.wire to the other side of the engine since i have the AirCondition unit at the drivers-side.

And another thing is that in Tunerstudio where the triggerwheel setup and ignition input capture is at "Rising Edge" if this is wrong or reversed wired cant i get the same errors, in missing tooth, synch error nr 2.

thanx

[jsmcortina]

Please post a "tooth log" and a "composite log"

James

[Meguiars]

Please post a "tooth log" and a "composite log"

James

Here i finnaly manage to get out in the garage after a double inhernia operation last friday.

Here is Tooth log, composite log and trigger log.

tooth.csv

trigger.csv

[Meguiars]

Here is some more logs

2014-12-17_13.10.54.zip

2014-12-17_12.40.10.zip

2014-12-17_12.56.00.csv

By the way, i turned on Noise killing, and the car seemed much smoother and responsive.

And i also tried to change the injection from 2 squirt alter to 1 squirt simultan, the afr was around 14:1 and when i turned on 1 squrt simult, it went down to about 10:1, Is the deadtime all wrong then? when it goes richer doing this should i increase the Deadtime or lower the deadtime. And should it be aboute the same on both squirts 2. alter and 1 simultanious when i switch between them. The deadtime that came with the injectors was at 12 Volt 0.682, 13Volt 0.616ms and at 14Volt 0.550ms so i put it in Mesgasquirt at 13.2Volt at 0.603ms. what should the correct be for those who knows how to calculate it.

On the paper i got from Fiveo it was only 4 injectors because they missed that i was suppose to have 6 injectors, does it mather if it was for 4 cyl compared to 6 cyl. Isnt the dead time equal on all of them regardless 4 or 6 cyl.

[Meguiars]

And here is my .MSQ

NR2.msq