That is good news on the leak down!
For your throttle I suspect that the throttle body is the culprit. I’ve had a billet Blox unit since I’ve swapped to an H22 years ago and it sticks closed after sitting over night, essentially the opposite of what you’ve described. I just have to tap the pedal before start up and it works smoothly and as normal after that. To alleviate you issue, you might be able to open the throttle plate and polish the edge of the throttle plate itself to see if that will remove the friction that is stopping it from returning to idle position.
For your throttle I suspect that the throttle body is the culprit. I’ve had a billet Blox unit since I’ve swapped to an H22 years ago and it sticks closed after sitting over night, essentially the opposite of what you’ve described. I just have to tap the pedal before start up and it works smoothly and as normal after that. To alleviate you issue, you might be able to open the throttle plate and polish the edge of the throttle plate itself to see if that will remove the friction that is stopping it from returning to idle position.
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