When ETC speed limiter is reached, and pedal position is above 9%, throttle position will not go below 17% to maintain the set speed limit. At 30km/h 17% is too much.

Anyone familiar with user defined parameters for ETC, have you seen a lower limit at around 17% throttle position when ETC speed limiter is active? Any other ideas? I really want to avoid limiting speed by fuel cut/lower spark etc and only use ETC.

Attaching files. This is an older engine and non computer auto running the P59 PCM, sensors etc in SD mode.

75_lemans_2004_5.3_1.14SP?RR.hpt
1.13.hpl