Vems Idle Troubleshooting

[peter_jensen]

Hi

As I can see a lot of people have trouble getting the idle to work as the monotonic.

Question: Have you remembered to install a 1N4007 Diode to the iac + -
If not it’s not possible to get a good idle.

I have been running Vems since 2004 on different cars and now on S2 that idles like the monotonic.

Firmware is 1.1.44 14x16

Remember:

Have almost the same values in VE and Spark tables in the idle area (bottom left) if you add fuel you rice the rpm. Work with lambda 0,98-1 spark should be around 12-15 degrees.

Please report back if you try my setup. We need to know to make Vems Ecu´s better.






#Peter

https://www.au2stereo.dk/vems.html

My config

[GazzaG60]

good post there.

i have not done this. i dont use the idle valve and i have good idle after initial start anyway.

i will look at doing this.

whats firmware level are you on.

[Billman]

i have installed the diode but it didnt helped much and now i am using without the Idle valve! But if it is better now (i used firmware 1.1.27beta) then i am going to try it again with 1.1.44alpha.

Did you use EGO Correction at low RPM (if yes what)?

Did you managed to get the knock sampling to work?

[peter_jensen]

Vems

Hey Bill Mann

It is sad to hear you can not get it to work. You can upload your config file table and then we look at it.

There are also many other factors that may cause bad idle ie dirt in the valve Large cam and so on
It does not help to upgrade to 1.1.44 regarding idle but acceleration is much better.

It is being made a new knock code (alternative knock) which I hope will be easier to set because the current is very complicated
If you need equipment to knock I can recommend this KLM

[Billman]

does 1.1.44 work with Auditrigger? I gonna get to the car on 2 weeks so i am going to try it out once again!

This code about knock sensing is going to be in a future version?

Does 1.1.44 has the idle compensation thingy when voltage drops?

[GazzaG60]

billman after speaking to somebody else who is testing 1.1.44 they said that it works better auditrigger now. the old issue of the sensor sync is now gone i believe.

i too will do some testing with this once it gets a little warmer.

[button]

Today I try this setup with firmware 1.1.27, but I forget to change spark table (only VE) but Idle works good. Tomorrow I try to change Spark table and I inform about progress.

[peter_jensen]

Vems IDLE

That’s great

Nice that I could help you

https://www.au2stereo.dk

[Billman]

at what RPM does EGO correction start? I start it at 600 RPM so i have always good adaptation! with ths Idle valve it didnt worked so good without it, it was much better!

But i going to try the 1.1.44 out with the settings again and see what happens!

[button]

I'm starting EGO correction at 1600rpm and I didn't try to use idle valve with it.

PS. Sorry about OT but I must assign this question: for what value you have set the EGO correction stop?

[Billman]

I installed firmware 1.1.44 but the car now dont start and i cant go back to the 1.1.27beta firmware! Any tips?

[GazzaG60]

will it not detect the ecu?

you can bridge pins 2 and 3 for a reset. power off, paperclip in 2 and 3 and power up again. remove clip and redo firmware.

[Billman]

no, i start megatune and it sees the ECU but i become this error message that it needs VEMS 16x14 and it has "$%§§$-Would you like to terminate MT now?.
If i press no, MT starts OK,i t reads the RPM and temps ok but it doesnt start! I think it has to do with settings.

Gazza do you run 1.1.44?

[GazzaG60]

i run 1.1.27rc still IIRC

[Billman]

do you know of someone using 1.1.44? I need help fast because i need the car tomorrow!