1st question: I should see changing numbers, both BLM and INT, when in closed loop mode, correct?
Yes.
From the EFI Dictionary:
http://www.gearhead-efi.com/gm-ecm-p...ictionary.html
INT = The short term fuel trim value is called the Integrator The value of the integrator varies above and below 128 with 128 being no correction. For example, if the Integrator is 135, the ECM is adding fuel because the 02 sensor is reading a lean mixture. If the Integrator is 110, the ECM is removing fuel because the 02 sensor is reading a rich mixture. Anytime the system is not in closed loop, the Integrator will immediately return to a value of 128 and stay there.
BLM = Block Learn Multiplier. Block Learn Mode term is long term fuel trim. BLM value tracks the Integrator but has a delay. If the Integrator increases so does the BLM, but the BLM lags behind the Integrator. The higher the Integrator climbs above 128, the faster the BLM rises. BLM value affects the VE table by adding fuel above 128 and subtracting fuel below 128
You really need to assure the EGR is off and get rid of knock counts, especially if you can hear knock! Plus you have an ESC test that will come into play on top of all these knock counts you have during PE!
Code:
;---------------------------------------------
; ERROR 43
;
; ESC FAIL
;---------------------------------------------
LD52E FCB 0 ; 0 SEC ENG RUN TIME PRIOR TO TEST
LD52F FCB 120 ; Min time since run enable, (120 sec)
LD530 FCB 235 ; PA count limit
LD531 FCB 23 ; EST fail test period, (2.3 sec)
LD532 FCB 20 ; TEST DURATION
;
LD533 FCB 48 ; COLD LMT
LD534 FCB 39 ; HOT LMT
;
LD535 FCB 128 ; 3200 RPM LMT
LD536 FCB 195 ; 82.3 Kpa MAP LMT, (BPT )
;--------------------------
; SPK ADV TO FORCE A KNOCK
;--------------------------
LD537 FCB 23 ; 8 DEG, 1st PE MODE
LD538 FCB 43 ; 15 DEG, 2nd PE MODE
LD539 FCB 2 ; KNK ACCUM LIMIT
;---------------------------------------------
Now if you were running $42 you could run the ESC Done patch and not have to worry about forced knock! And would have exact settings for EGR disable. Or continue to develop ways to do this in $4E...
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