Wasn't aware of any graphite coating on the throttle plate edges so will have to wait and see. There was definite carbon buildup on the walls on both sides of the plate which was the focus of my cleaning. Didn't have any DTC's or warning lights and did disconnect the battery neg terminal. It idles and runs smoother and throttle response is nicer and I don't think I'm suffering from the placebo effect.
I'm pretty "in tune" with how it runs and notice changes. Will have to say that in the last few months, I've noticed three things that made improvements in smoothness and how it responds:
1) changing to Castrol Edge 0w-20 motor oil vs. what the dealer used in prior changes. I've noticed over the years the difference in oils. Some just seem 'slicker' than others and some felt 'dry' if that makes any sense. I remember years ago that Castrol introduced a motor oil called"START_UP" that contained some group 5 full synthetic (ester) and it made for some really smooth idle, but the effect didn't last.
2) doing 2 D&D on transmission fluid
3) cleaning the throttle body
Maybe I got too much time on my hands. LOL. Keep the faith. Jmaz
I'm pretty "in tune" with how it runs and notice changes. Will have to say that in the last few months, I've noticed three things that made improvements in smoothness and how it responds:
1) changing to Castrol Edge 0w-20 motor oil vs. what the dealer used in prior changes. I've noticed over the years the difference in oils. Some just seem 'slicker' than others and some felt 'dry' if that makes any sense. I remember years ago that Castrol introduced a motor oil called"START_UP" that contained some group 5 full synthetic (ester) and it made for some really smooth idle, but the effect didn't last.
2) doing 2 D&D on transmission fluid
3) cleaning the throttle body
Maybe I got too much time on my hands. LOL. Keep the faith. Jmaz