what does the knock 0 1 2 windows mean on VEMS?

[Billman]

In theory a bad VE table can have a lean spot and till the EGO correction takes care of it it knocks.
Still be very carefull with the changes and avoid full throttle/boost runs at these high IAT till you can hear for knock and be sure about your map.

Have you checked the basic ignition timing with the timing light?

[popdemonic]

you meant this?

[Billman]

what exactly?

*I can see the picture now*

[popdemonic]

what exactly?

It's the timing light gun for checking the basic timing.

[Billman]

Yes. You must check if in Primary Trigger settings/TDC after the trigger is correct?

[Billman]

I posted it on vems forum to see what other think about the knock window graph and the coincidence with other events.

[popdemonic]

Thanks Billman.you posted on vemssupport?

[Billman]

yes here

[EBR]

Hey Billman,
Here's the problem.recently oth of us has been running the VEMs w/o IAT working correctly
Since we forgot to upload another 2 patch files.the IAT seems to show 20-23 C deg. Constantly.
In this case,it means the ign/mat retard table was not working so after we have uploaded the
2 patch files.we found out that our VE table needs to be tuning again.the upper right table is running way leaner
than we had on stock IAT sensor.we're having some kinda detonation issue and we're sorting out the
Proper ignition table and lambda target.we're living under tropical weather in Thailand.it's hotter almost
Year which means we have less indense air and fuel quality.we have E10 E20 E85 fuel available.soon we're going to
get tuning with E85 for the better detonation resisted and performance side.the problem is we don't know how to read and understand the
Knock 0 1 2 3... Windows on the VEMs log view.how to identify the number if it's detonation or still on the safe side
For that number.I need to be stay tuned for a while until I got the better and cover all regions on VE table.

Sorry about the off topic, but I would like to ask you about the IAT problem you talk about because I have the same problem. VEMS always shows the same IAT, 23°C. What did you do to fix this?

Thanks, Eiríkur

[KRIENG]

yes same as me when we upgrade firmware but didn't read this link ( No. 5 )
sorry we must tune VE again and ignition change too.

I'm wrong with IAT 22-23 in one year. Thank for Pop told me.

I'm think how many Vems I5 wrong.


http://www.efiexpress.com/catalog/ar...?articles_id=6

[popdemonic]

yes same as me when we upgrade firmware but didn't read this link ( No. 5 )
sorry we must tune VE again and ignition change too.

I'm wrong with IAT 22-23 in one year. Thank for Pop told me.

I'm think how many Vems I5 wrong.


http://www.efiexpress.com/catalog/ar...?articles_id=6

lol,as i told you there must be a lot folks having same issue since they forget to upload those patch files.

[cooperquattro]

Mine is the same..I use 1.8t mat sensor and mind is stuck at _14(I think) if g use aby sensor it sticks at 23,what is the issue

[Billman]

If your VEMS was assembled for original MAT sensor then in order to fit 1.8t sensor you need to remove an SMD resistor from inside VEMS.

[cooperquattro]

It must be configured lo run 1.8 mat as this was supplyd at the same time,might be patch file issue???

[Billman]

If it was supplied with it then you most probably have wrong data.

Go to Vemstune menu: Input, MAT sensor curve and choose VEMS standart mat. Is almost same with the 1.8T mat in the data.