The car is a 95 volvo 850 turbo, has an 04/05 2.5t motor, stock bosch 330cc injectors, vems v3 running sequential coil on plug ignition and sequential injection.
From the start i have been having trouble trying to get the car to idle correctly, i am not using the iacv(last resort i will put it back on) i managed to get the car to run and idle very well with the megasquirt ms2extra without an iacv, so i know its not impossible.
i can send a data log/config file to anyone interested, or maybe i can upload it(ill try after posting this)
I cant seem to get a steady idle at around 1k rpm, it always wants to hunt up and down(lean right?), so i richen it up until it stop hunting but it only stop hunting when very overfueled, like .70 lambda, so rich that the wideband reads lean. I have tryed changing spark advance, alsorts of different combinations of fuel ve and spark ve, cannot get a smooth idle for the life of me.
The car seems to drive great, but as soon as i let off the throttle in neutral the rpms fall down low and jump back up and hunt up and down, alot of the time it will hunt down so low that it just dies.
To be honest i am a bit lost using vemstune, the injector settings are different to what i had in tunerstudio with megasquirt, so im not sure how to set them up properly, injector effective rampup?
ANY help is very very very appreciated!
EDIT: here is a datalog,ill make another tommorow and see if i can get some more info on it.
https://sites.google.com/site/mdlimy/my-upload/v3.3_n003369-2011.04.08-19.49.51.vemslog?attredirects=0&d=1Thanks
Robbie