Starting from cold

[Denmark]

Hi All.

I have a problem when the temps are going down to zero degrees,
The car starts, and then dies, i can then start it again, and it dies again,
And the third time it starts, and can keep running,

But i cant seem to figure out what i need to change to make this work the first time,
 i have now been thinking of the primepulse in the "cranking and afterstart" can affect this, so this have to be higher, i have 1.0ms there.
9 ms in cold cranking, and 2 in varm cranking,
But it starts and runs fine when warm

Any pointers to solve this?

Thanks,
Skassa

[rob@vems.co.uk]

Yeah watch the PW gauge on the front screen - does it drop down and then the car stall?

You might need to increase your warm-up enrichment at that point - go to
Settings->Priming, cranking & Afterstart and increase the value in Afterstart duration, number of engine cycles its maximum is 1530 ( ) if extending it to its maximum doesnt help then definately work on your warm-up enrichments.

[Denmark]

THanks,
I will give it ago,
It´s allready at 1152 in that setting, i have not been looking at the pw , but will check it to see if that could be the problem.

Thanks,
Skassa

[rob@vems.co.uk]

My point is that if you see a sudden drop in PW and the engine stalls then you need to find a way to smooth out the drop.

[MWfire]

I use on 8valves head
afterstart enrichment 250% and 13% scaling, 500rpm
on 16v head
afterstart enrichment 150% and 16% scaling, 400rpm
On -12C without problems.
But in 1.1.51 firmware cranking is much better
http://www.vems.hu/wiki/index.php?page=MembersPage%2FAndrey%2FCranking

[Denmark]

I use on 8valves head
afterstart enrichment 250% and 13% scaling, 500rpm
on 16v head
afterstart enrichment 150% and 16% scaling, 400rpm
On -12C without problems.
But in 1.1.51 firmware cranking is much better
http://www.vems.hu/wiki/index.php?page=MembersPage%2FAndrey%2FCranking

Thanks,

I can see that im fare of, as i have 50procent enrichment and 100% scaling, and 1500 cycles

So am i only injecting half the fuel of normal, i did think that it was 50% on top of the regular fuel

[Pet]

Hi, only for reference,now I am tuning cold start too (before the warmer weather will come I hope soon, grip is necessary and I have on my 2.0T-16V 150% WUE at 6C, (170% at -4.4C) and PW is then about 3.1-3.5ms, normal hot PW is 1.8-1.9ms. Today morning the car started up on the first attemp and very nice (1.0.73FW) (ambient temperature was aprox +3deg C).
   Pet