Electredge Posted April 28, 2023 Report Share Posted April 28, 2023 As you can see in the log at the end of the dyno pass the throttle is closing slowly... target drops immediately to zero but it slowly shuts. I've tested multiple PWM Frequencies, modified the PID numbers... nothing seems to help. I have even tested it with a new throttle body with same result. Bosch Motorsports 74mm E-Throttle Let me know if anyone has seen something like this PC Datalog - 2023-04-27 1;35;53 pm - throttle hang issue.llgx Quote Link to comment Share on other sites More sharing options...
Vaughan Posted April 28, 2023 Report Share Posted April 28, 2023 Changing PID numbers won't improve it as the ECU is commanding -90% E-Throttle 1 DC so it's putting as much force as it can on the throttle to shut, you have an electrical or mechanical issue not a tune issue, it also required -85% Duty to hold it at 6% after that which is an insane amount. Quote Link to comment Share on other sites More sharing options...
Electredge Posted April 28, 2023 Author Report Share Posted April 28, 2023 Just now, Vaughan said: Changing PID numbers won't improve it as the ECU is commanding -90% E-Throttle 1 DC so it's putting as much force as it can on the throttle to shut, you have an electrical or mechanical issue not a tune issue, it also required -85% Duty to hold it at 6% after that which is an insane amount. ok so if the throttle body isn't the issue I need to look at the wiring.... and I was just testing the reaction with the PID but I was pretty sure it wasn't gonna change anything. I'll look into the wiring, thanks Vaughan Quote Link to comment Share on other sites More sharing options...
Vaughan Posted April 28, 2023 Report Share Posted April 28, 2023 Actually given it takes 1s to shut I think it's a mechanical or a TPS reading issue as it shouldn't take 1s to shut even with no power to the throttle Can you replicate the log while watching the throttle to confirm TPS is correct? Electredge 1 Quote Link to comment Share on other sites More sharing options...
Adamw Posted April 28, 2023 Report Share Posted April 28, 2023 Jon, I just replied to your email a short while ago assuming it is the same car we were talking about. Im 99% sure this is the brushes bouncing off the commutator from vibration. Electredge 1 Quote Link to comment Share on other sites More sharing options...
Electredge Posted April 28, 2023 Author Report Share Posted April 28, 2023 12 hours ago, Vaughan said: Actually given it takes 1s to shut I think it's a mechanical or a TPS reading issue as it shouldn't take 1s to shut even with no power to the throttle Can you replicate the log while watching the throttle to confirm TPS is correct? car already had to leave on its way to a race event but after reading Adam's email and learning about a change that was made to the throttle body flange I'm pretty sure Adam is correct. Thanks for the help Quote Link to comment Share on other sites More sharing options...
Recommended Posts
Join the conversation
You can post now and register later. If you have an account, sign in now to post with your account.