RPM Hangs Between Shifts
#1
RPM Hangs Between Shifts
03 Sierra
4.8/5-spd
Cold Air Intake
'01 Spec Z06 Cam 204/211 .525/.525 116LSA
GM Performance Touring Exhaust
I've tuned the truck using HP Tuners and a WB. PE comes in dead on at 12.5, Zero Knock and after about 6 months of not touching anything...
LTFTs are showing 0-1%
The only item I can't track down and truthfully haven't spent much time messing with it...
The truck has an annoying tendency to hold RPM between gears in normal driving. I typically even see the RPM rise a bit with boot off the throttle and the clutch in. It take a few seconds to settle down and can be annoying.
Anyone seen similar?
I am going to set up a PID and do some logs to see if commanded throttle differs from actual - or timing is being added. I did the Russ K idle config today just to double check RAF.
Thanks for any help.
4.8/5-spd
Cold Air Intake
'01 Spec Z06 Cam 204/211 .525/.525 116LSA
GM Performance Touring Exhaust
I've tuned the truck using HP Tuners and a WB. PE comes in dead on at 12.5, Zero Knock and after about 6 months of not touching anything...
LTFTs are showing 0-1%
The only item I can't track down and truthfully haven't spent much time messing with it...
The truck has an annoying tendency to hold RPM between gears in normal driving. I typically even see the RPM rise a bit with boot off the throttle and the clutch in. It take a few seconds to settle down and can be annoying.
Anyone seen similar?
I am going to set up a PID and do some logs to see if commanded throttle differs from actual - or timing is being added. I did the Russ K idle config today just to double check RAF.
Thanks for any help.
#3
The enable/disable is set on Throttle Cracker for 2 mph/3mph.
What about the Throttle Follower Airflow Decay ?
#5
Launching!
So if I correctly modify the throttle cracker/follower that will allow the engine to have better "throttle response"? Seems like these newer engines are lazy compared to the old stuff.
#6
9 Second Club
iTrader: (7)
Throttle cracker and follower have to do with decending airflow. Optimizing those tables will allow for a bit quicker drop in rpm to idle when revved. Timing and proper ve and maf tuning will aid in increase throttle response when "blipping" throttle. Delete tip in torque management helps too. Torque converter lockup makes the response feel lazy too, you can tweak the enable speeds and tps to delay lockup some at part throttle. You could also set your power enrichment enable tps% lower for a quicker entry, that makes part throttle feel much better, but mileage will drop some due to the increased fuel consumption.
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