Car hesitates after WOT shifts
12-20-2003, 11:16 AM
#3
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Another possibility is that there is knock retard happening
right at the bottom of downshift (engine RPMs pull down
harder / faster w/ the shift kit, making the slow reaction
of timing advance more of a problem. I used to see this
w/ my stock converter after shortening the adaptation
time w/ Predator, little KR "blips" on the WOT upshifts.
The KR, unlike torque management, has a persistent
"tail" that takes several tenths of a second to fully
disappear once triggered.
Maybe you want a little more PE. If you were able to
adjust the torque management action to make it pull
(say) only 2-5 degrees of timing during the shift this
might suppress it more cleanly, but this is getting fancy.
TM timing pull seems to come & go instantaneously and
a little pull during the shift (instead of 30 degrees
)
might be a better overall action (ease up on the trans a
tiny bit, and avoid the knock event that rolls on KR).
right at the bottom of downshift (engine RPMs pull down
harder / faster w/ the shift kit, making the slow reaction
of timing advance more of a problem. I used to see this
w/ my stock converter after shortening the adaptation
time w/ Predator, little KR "blips" on the WOT upshifts.
The KR, unlike torque management, has a persistent
"tail" that takes several tenths of a second to fully
disappear once triggered.
Maybe you want a little more PE. If you were able to
adjust the torque management action to make it pull
(say) only 2-5 degrees of timing during the shift this
might suppress it more cleanly, but this is getting fancy.
TM timing pull seems to come & go instantaneously and
a little pull during the shift (instead of 30 degrees
)might be a better overall action (ease up on the trans a
tiny bit, and avoid the knock event that rolls on KR).
12-20-2003, 12:36 PM
#5
Originally Posted by WILWAXU
yeah.. on a 98 it's not likely TM.
I'd look at KR first.
I'd look at KR first.
12-23-2003, 04:45 AM
#6
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my truck does that exact same thing...i'm not seing any knock retard on my wot shifts tho...it just hesitates like mad and it is the worst on the 1-2..one thing i notice is when i clear the computer it shifts perfectly fine until i get about 3-4 wot shifts and then it goes back to crap..im really curious whats causing this because it is slowing me down quite a bit..im thinking it has to be something in the computer because it won't do it right after its cleared (like right after i reprogram with my hpp3), but im not sure what in the computer is causing it... help please
