VemsTune and 1.1.6x release

[dnb]

Interesting.  It uploaded to mine without incident and the car even ran.  The coldest start it's ever done at -4C too.

[Tony C]

how strange,
wonder why it wont load onto my ecu?

[Tony C]

right been back round to the car,
still wont start, if you hold it continuosly on the key it tries to run, let go and it stops,
if you touch the throttle it dont even try,#
leave throttle alone (closed) and it does the above tries to fire pops and bangs a bit then turns over, then tries to catch etc etc,
anyone fancy taking a look at my cfg file?
failing that i may have to put MT and 1.1.44 back on cos at least it ran with the msq file i got saved from that setup.

thanks guys,

[gunni]

Have you been able to connect with the ecu again?

Are you able to log what is happening now and possibly against older logs of similar starts?
Mainly to see if the pulsewidth is same or very similar.

[Tony C]

i'll do that tomorrow mate,
yes connecting to ecu ok now,
how do you do a log with VT?

[gunni]

Tools - start new vemslog

[Tony C]

doh! cheers

[Tony C]

what i could do, is do a log with the new firmware 1.1.64 where it dont start cold,
then re flash the ecu with the old 1.1.44 firmware and msq and config, and datalog that on cold start then someone who understands the datalogs could possibly take a look for me?

[gunni]

Well post up the logs and the configs.
And somebody might have a look.

[dnb]

Have you looked at the cranking and afterstart tables?  They were completely corrupted in the file you sent me, so I copied over the ones from my TVR.  These will most likely not be right for your car.

[Tony C]

i did but they are different between mt and vt and im a bit confussed over setting them up,
i have a cold start log on 1.1.64 and cold start log on 1.1.44 and it running,
i then uploaded 1.1.64 again and got it to fire and run when hot and also have a log of this if anyones interested in having a look for me?

[Tony C]

files are here:
http://www.capriracing.co.uk/datalog-09-01-2010.zip

i have put the files for 1.1.44 and 1.1.64 in seperate named folders
the 1.1.44 files are an msq and xls file as they were done in megatune not vems tune.

thank you....

[Sprocket]

In 1.1.44 there is prime pulse hot and cold but still no cold start enrichment. Vemstune - The reason that the engine doesnt start in 1.1.64 is that it uses the VE value. That VE value needs to resemble the warm start pulse width, and then tune the cranking enrichments table for cold starts as a percentage, 100 being the VE value set above, and obviously the pulse width depends on the size of the injectors. So you have prime pulse AND cold start enrichment.

That there is the problem

I am really surprised that the engine starts with just prime pulse

Perhaps with the prime pulse as big as it is, with the cranking enrichments, the engine is now flooded? Try it by removing the prime pulse value, check the engine and clear it out if it has, stick the plugs on the gas burner to clean them off, but do not cook them.

[Tony C]

the car starts every time on the 1.1.44 settings,
even after i tried starting it on 1.1.64 and it failed,

where are these settings in VT mate?
sorry im still learning VT only used it this week
im an old MT user you see :-(

once warm the car starts on 1.1.64 although it did seem to kick back a bit but it seems to run better when hot on .64 than it does on the .44 firmware and revs up a lot crisper too,
had all these probs with .44 but Damir managed to sort that prob out for us,

[Tony C]

oh injectors are bosch greens, 42lb/hr 440cc/min if i remember correctly,
required fuel is set to accomodate the larger injectors,