Vlad's rides thread

[vlad01]

yeah man happy to add stuff to tuning guides if you have something there we haven't covered.

also with the buick oil rings, your not wrong they are wafer thin hey!

These are half as thick as the stock lol.

[vlad01]

So working on this charge temp thing and I have noticed during warm up idling i get a random section where the target AFR jumps to 14.7 for about 20 sec and then drops back down to the usual 13.3 or what ever the idle AFR is. Yes I did check if it goes in or out of closed loop idle, which it does stay in closed loop when that happens. The idle AFR table does not have this value and I can't work out why it does this. It does it every time without fail. Since the engine is still cold it makes it idle rough when it goes this lean.

The only consistent bit of data this correlates with is when the CTS hits 44c, every time without fail. I cant see anything in any of the tables to suggest 44C would do this.

[vlad01]

just thought to check the idle Kpa verses what the VR does in one of my logs. Lol, the VP idles at 35Kpa and the VR is low 20s

I suppose it might be possible that its using the normal AFR table when it does than but still can't see any correlation.

Also still having this issue where the baro shows above 100 no matter what despite being 96Kpa before the engine is started. I loaded my BIN and log freshly and still the baro shows maxed out.

[Dylan]

There is a table called idle map threshold but since it stays in closed loop idle I would of thought it wouldn't of maxed that out. Even then the log I seen went out to a commanded 14.9 which no table had at low rpm. And this was after a few minute's running. Im interested to know why it does this.

[vlad01]

14.9 target is interpolation of the 14.7 and 16 cell in the main table. So maybe I need to set the idle threshold table to 35 or something? doesn't make sense as it says its closed loop idle.

[Dylan]

What rpm does the 16 start? Not sure how far up they interpolate but sounds good.

[Dylan]

Got this from another thread

The table is used in the throttle crack algorithm. Just need to make sure your normal idle MAP is above the value, if MAP dips below the table values the ECU drops out of closed loop idle speed control.

[Dylan]

Just played your log again. MAP is a steady 35kpa so your under the idle map threshold. Both BLCD and APNX are by default 25kpa. So you're not going over the 25kpa threshold or the closed loop idle flag dropping off.

[vlad01]

What rpm does the 16 start? Not sure how far up they interpolate but sounds good.

1200 at 40kpa.

I see the bubble just nicking that cell.

[Dylan]

1200 yeah I'd think ot would gwt that far. Maybe aet the idle map threshold to 20 and see if there's any change?