Noob dbw high idle

[ZT-R]

Hey guys having high idle issues, found no leaks. Pedal works fine with key on engine off but gets a little weird with engines running.
Here’s a log
https://www.dropbox.com/scl/fi/qw3r8fxqorfcizgn10n16/S1_-9649_20240515_091001.zip?rlkey=zg66tki1zzh98lnq90fsk67wd&dl=0

[David Ferguson]

When the car was idling normally (1000 RPM, about 10min into your log file), the throttle aim was about 2%. When the car won't idle (about 12:45 into your log), the throttle aim is 8.8%, and the Throttle Pedal signal is very noisy (varying between 0 and 11.8%), it is also reporting a "Low Warning" on the Throttle Pedal Sensor Tracking Diagnostic, and thus the Throttle Pedal Sensor Diagnostic is "Single Sensor". It was not this way before you started the engine, or when the engine was idling normally.

I suspect that you have a wiring problem with the ground for the Throttle Pedal. That is configured for using the 5V/0V Supply A for the Main, but using "Absolute" voltage for the Tracking -- I'm surprised you aren't using the same ground for the tracking voltage.

Hopefully that gives you some hints as to what to look for.

Also, something very strange to me. In your wiring help, it indicates the OUT_HB1 is being used for both the Motor Output and the Throttle Servo Bank 1 Position Sensor Main Digital Decode -- but the resource for Throttle Servo Bank 1 Position Sensor Digital Decode is set to "Not in Use" -- you might want to report that to MoTeC USA...

[ZT-R]

Ok I’ll check it out. It’s all raychem and milspec it’s been running fine for about thr 8 months it’s been running. Maybe something has chafed. Thank you

[ZT-R]

https://www.dropbox.com/scl/fi/7eeup9fh ... wbtei&dl=0

[ZT-R]

5v good at plug good sensor ground. No continuity between chassis and sensor gnd until m1 is powered up.

[Stephen Dean]

What Throttle Pedal / Throttle sensor are you using?

[ZT-R]

Lokar GM06
Lokar PN BDBW-GM06
All GM Crate Engines, '08-'12 Cadillac CTS/CTSV, and '10-'12 Camaro OEM PN#10379038, #10367117, #22741799, #22741800, and #92199239
https://www.lokar.com/throt-assemb-pedal-pads.html

https://www.summitracing.com/parts/lok-bdbw-gm06

[ZT-R]

They utilize a Williams control sensor but the. Umber on it is proprietary.

[ZT-R]

try a new pedal i suppose? maybe ill get a cheap little bosche one, probably never have a problem with it. ha