vp304 wrote:This is from 2 days ago so ve map is slightly changed by maybe 1 or 2 %
Car drives good afrs are pretty dam good all round.
only time i see it mega rich is like i said when i stab throttle when car is cold. in neutral
Also i have knoticed when warm and slowing down coming of throttle it goes rich around to 12.5 afr
Not sure if both these problems due to a part of the ve map that the car goes into when slowing down coasting or
free reving in neutral with no load on motor ?
I see there is a deceleration enleanment ? part also in the tune. Is this like a enrichment on slow down ?
There are a few aspects you must consider here.
Idle and off idle will have different VE tables as well as different commanded fuel tables, Unless you have set the idle fuel parameters to be ignored it will then run only on the main VE and commanded fuel tables at all times including idle.
I have done this myself as I have setup a VR ecu on my Holden 202 and was a lot easier to tune doing this.
What your likely experiencing is the idle VE and commanded fuel tables are working fine as seen at 12.5 AFR etc and when you come off throttle the ecu references the main VE etc and is not set correctly. Id disable the idle VE and commanded fuel, do all your idle and cold start on the main VE only then enable the idle tables again. (I have left mine disabled all together)
Secondly for cold start there are parameters under A/F Ratio - Cold Engine A/F Ratio vs Coolant Temp and MAP
With the idle fuel disabled I ran the engine up from cold to full temp at idle and made adjustments to these parameters while emulating. This got me around the ballpark.
I hope this makes sense and is helpful.