Start playing with EGR today.

Looking at the bin at
0x06CE KEGRVAC1 EGR - Vac Threshold- EGR On 195kPA
0x06CF KEGRVAC2 EGR - Vac Threshold- EGR Off 189kPa

1. How do I convert these to MAP readings? I want to enable EGR only under 60 kPa (MAP reading)

One other thing....

It takes 80sec before BLM is enabled after a hot start, why?
I cant find the reason in the hac/code???

Kt1A $349 10sec
Kt2A $348 5 sec
KADSUCT $34A 99.5deg

/N.

 

I'll have to do some digging before I can answer your first question very well. My first approach (probably yours, too) would be to set vacuum to BARO-60kPa for whatever BARO you usually see. However, the values you list are greater than 100kPa. Either they were set abnormally high to stay out of the way or there's some other scaling going on.....

Regarding your second question about BLM. There are essentially 4 checks that must be passed before the BLM will update at closed throttle: Coolant > Cal, RPM > one cal, RPM < another cal *and* AFR=stoich. From my testing with WB closed loop, I notice that my AFRs after starting take quite a while before they get back to 14.7ish values. I haven't played with the AFR cals much from the stock bin I first disassembled. So, I'm sure there's room for improvement. You might want to check your desired AFR after your hot start to see if it goes immediately to 14.7 or if it takes ~80sec to get there....

 

Found this today.........

The blending of the air fuel ratio between crank air-fuel ratio to run air-fuel ratio Is accomplished
by decaying the crank-to-run air fuel term from the following equation for air-fuel ratio.
AIRFUEL = AIRFUEL - AFTICRT
where: AIRFUEL = Air fuel ratio
AFTICRT = Crank-to-run air fuel time-out term

The time-out term is decayed as follows:
AFTICRT = AFTICRT * (*KRAFTDM*)

where: *KRAFTDM* = Crank air-fuel to run air-fuel decay multiplier
The time-out term is decayed at a rate determined by the *F64* table as a function of coolant
temperature.

0x05FA F64 Crank-To-Run AF Decay Delay vs COOLDEGB
and then this..

0x0329 KCAFTI Initial Crank AF Delta 2,1 Ratio
0x032A KCFTM Crank AF Decay Delta Time 1,2 Sec.
0x032B KCFTM1 # Ref Pulses Before Crank Fuel Decay 8 Pulses
0x032C KCFTM2 # Ref Pulses Between Crank Decay Loops 10 Pulses

Will continue the investigation........

 

So,.......

Was the Target AFR the reason for your BLM delay.....?

 

Will try this weekend............also will chase my BLM problem...see other thread........

 

yes its the afr delay thats causing it.............

 

Will test changing the F51 table

and

will also test change the KAFDM value at 367. I guess I should lower the value to get the AFR value to 14.7 quicker right?


/N.