TPS dip
Posted: Thu Sep 01, 2022 7:57 am
Hope someone can help here with some suggestions. I am battling DBW throttle closing issues for a while now. Engine is a V8 with a supercharger. I upgraded the stock throttle to a unknown brand bigger throttle, then I moved to a LT throttle (SENT type), both would give throttle closing issues. Lastly I changed to a OEM LS9 throttle. This was ok for half a year, now the closing issue is back. I had a new LS9 throttle to test back to back if it would make any difference. New LS9 throttle fixed the issue for now. I attached the logs of the issue on the LS9 throttle and a another log after swapping just the throttle to a another new LS9 throttle, no changes in the calibration.
This issue always occurs around 5000-5500 rpm on all the throttles, maybe vibration at that specific rpm, even on the new throttle you see the disturbance around 5000 rpm.
Anyone went through similar issues, and maybe found a solution, or a throttle in the 90mm range that would work without issues.
This issue always occurs around 5000-5500 rpm on all the throttles, maybe vibration at that specific rpm, even on the new throttle you see the disturbance around 5000 rpm.
Anyone went through similar issues, and maybe found a solution, or a throttle in the 90mm range that would work without issues.