Question on making a correction in my tune..
#1
Le Mans Master
Thread Starter
Question on making a correction in my tune..
. The problem I'm having is , when I let off the gas pedal the rpms don't drop down like they're suppose to.. If I am driving along at any speed below around 30 mph and let off the gas , the rpm doesn't change and drop down and the car keeps pulling.. Which one of the tables in "Tuner Pro" would I address to get the rpms to drop down when the gas pedal is released...I know this problem is in the tune and not mechanical ,because when I disconnect the battery, then hook it back up , the rpms drop down like they're suppose to, once the ecm relearns , the problem is there again....WW
Last edited by WW7; 06-12-2019 at 11:42 AM.
#2
Race Director
Make sure the base throttle opening of your throttle body is not set too far open. Try turning the set screw down a turn or two and see what happens.
#3
Le Mans Master
Thread Starter
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Last edited by WW7; 06-12-2019 at 01:38 PM.
#4
Melting Slicks
Get a log of the event and note the behavior of the IAC, tps, vehicle speed, spark advance, injector pw, maf flow, load and rpm during the rpm hang condition. Would also be good to know the normal IAC counts in a warm stable idle in-gear. The IAC logic is complicated, so no simple answer without some data.
#6
Le Mans Master
Member Since: Oct 2002
Location: Las Vegas - Just stop perpetuating myths please.
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. The problem I'm having is , when I let off the gas pedal the rpms don't drop down like they're suppose to.. If I am driving along at any speed below around 30 mph and let off the gas , the rpm doesn't change and drop down and the car keeps pulling.. Which one of the tables in "Tuner Pro" would I address to get the rpms to drop down when the gas pedal is released...I know this problem is in the tune and not mechanical ,because when I disconnect the battery, then hook it back up , the rpms drop down like they're suppose to, once the ecm relearns , the problem is there again....WW
Hope this can help.
#7
Melting Slicks
Could be that the warm park position vs coolant temp is too high. Would be nice to see some data.
;------------------------------------------
; WARM PARK POSIT. vs COOLANT
;
;
; ARG = STEPS
;------------------------------------------
LC587: FCB 8 ; 8 + 1 LINES IN TABLE
;
; STEPS Deg c COOL
;------------------------------
LC588 FCB 125 ; 125 -40
LC589 FCB 100 ; 100 -16
LC58A FCB 75 ; 75 8
LC58B FCB 50 ; 50 32
LC58C FCB 25 ; 25 56
LC58D FCB 10 ; 10 80
LC58E FCB 5 ; 5 104
LC58F FCB 5 ; 5 128
LC590 FCB 5 ; 5 152
;------------------------------------------
;------------------------------------------
; WARM PARK POSIT. vs COOLANT
;
;
; ARG = STEPS
;------------------------------------------
LC587: FCB 8 ; 8 + 1 LINES IN TABLE
;
; STEPS Deg c COOL
;------------------------------
LC588 FCB 125 ; 125 -40
LC589 FCB 100 ; 100 -16
LC58A FCB 75 ; 75 8
LC58B FCB 50 ; 50 32
LC58C FCB 25 ; 25 56
LC58D FCB 10 ; 10 80
LC58E FCB 5 ; 5 104
LC58F FCB 5 ; 5 128
LC590 FCB 5 ; 5 152
;------------------------------------------
#8
Le Mans Master
Thread Starter
Thanks for the suggestions.. I will try to get out this weekend and do some datalogging... My son in law said he had the base idle set ' but I'm going to check it just to make sure he has it right... Thanks again. WW
#9
Drifting
In my ebl flash, its the "TF" OR Throttle follower settings.
I adjusted those settings making sure i got a quick snappy rev and the rpm would drop back down quickly for the next pedal tap.
It also ensures i get the maximum noise when using my engine to slow the car down.
I adjusted those settings making sure i got a quick snappy rev and the rpm would drop back down quickly for the next pedal tap.
It also ensures i get the maximum noise when using my engine to slow the car down.