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I recently did a HEADS and CAM install and had it DYNO tuned. Well, today I had my YANK SS3600 installed and wow what a difference, but my rpms seemed to be jumpier than before at idle. Could this be a tuning thing and once tuned it will be fixed?
It's in the tuning. idle will be chanced to a more normal setting now that youve got a higher stall in there. Also your shift points and such will need to be changed to take advantage of your new stall. Your tuner should be able to take care of all that. And they should have already disabled torque managment. If they havent they NEED to.
It's in the tuning. idle will be chanced to a more normal setting now that youve got a higher stall in there. Also your shift points and such will need to be changed to take advantage of your new stall. Your tuner should be able to take care of all that. And they should have already disabled torque managment. If they havent they NEED to.
It's in the tuning. idle will be chanced to a more normal setting now that youve got a higher stall in there. Also your shift points and such will need to be changed to take advantage of your new stall. Your tuner should be able to take care of all that. And they should have already disabled torque managment. If they havent they NEED to.
shane
Why do you say this??
My tuner feels it is a GOOD idea to leave TM on .... or at least not fully off. Something to do with its integration into traction controll.
My tuner feels it is a GOOD idea to leave TM on .... or at least not fully off. Something to do with its integration into traction controll.
DH
DH - Since the install and tune, my traction control doesn't seem to work as well. I am not sure what would happen if I turned it off and launched, but the car is wicked quick now! When I see my tuner (March 11th) I am going to ask him about it. Appreciate the post!
My tuner feels it is a GOOD idea to leave TM on .... or at least not fully off. Something to do with its integration into traction controll.
DH
Torque Managment will change your engine timing and throttle position during shifts. GM implimented this to prolong the life of automatic transmissions. Just because you've got your foot to the floor doesn't mean you're throttle is wide open. A guy over on fullsizechevy.com scanned his truck during an acceleration run and the pcm pulled timing and backed off of the throttle during shifts even though his foot was on the floor the whole time. And it also pulled quite a bit of timing.
Think of torque management as being analogous to ABS but for the throttle input. Automated (semi-autonomous) control systems have this characteristic of modulating (including ignoring) operator input. You can imagine that active avoidance control is next - your steering wheel input will be ignored.
mph1972, are you saying your idle characteristics were okay after your H/C and before your converter install and that it got flaky after the converter install? How much time was there between the two events? Your new converter is substantially lighter than the stocker and could have an impact on idle but I wouldn't really expect it to be jumpy/hunt. If they disconnected the battery or reprogrammed the PCM during your converter install it'll have to relearn fuel trims and idle but that should happen quickly and w/o any further reprogramming. If it doesn't, then whether or not your idle was stable before the converter install (and for how long) becomes important.
Last edited by ToplessTexan; Mar 3, 2006 at 08:56 AM.
Think of torque management as being analogous to ABS but for the throttle input. Automated (semi-autonomous) control systems have this characteristic of modulating (including ignoring) operator input. You can imagine that active avoidance control is next - your steering wheel input will be ignored.
mph1972, are you saying your idle characteristics were okay after your H/C and before your converter install and that it got flaky after the converter install? How much time was there between the two events? Your new converter is substantially lighter than the stocker and could have an impact on idle but I wouldn't really expect it to be jumpy/hunt. If they disconnected the battery or reprogrammed the PCM during your converter install it'll have to relearn fuel trims and idle but that should happen quickly and w/o any further reprogramming. If it doesn't, then whether or not your idle was stable before the converter install (and for how long) becomes important.
Topless Texan - This is what happened...H/C installed and a DYNO tune was done the next day with two weeks passing before I could get the car in the shop for the TC install. Now that the TC is installed the car's idle jumps around and sometimes dies. I called the shop and they did disconnect the battery and I need to get out and drive it some to get the computer to relearn the car again, but I am going back to my tuner and he is doing a retune with the new TC.