85 Throttle body conundrum
Racer
Joined: Nov 2015
Posts: 379
Likes: 103
It's like the throttle plates are either binding or being sucked open. It's not resting on the stop screw when it does this. When it hangs at ~1500 rpm I have to either physically rotate it back to the stop screw to get it to return to idle, or sometimes I can tap the gas pedal quick enough and it'll return. When the engine isn't running it'll return to the stop screw no problem, even if it's warmed up.
The throttle stick jams right at the start when you press it and the car is running, it doesn't jam when the car is not running.
My idle is around 1000-1100 rpm but when I press the gas pedal quickly to the bottom and release it the idle drops to normal around 850 rpm.
I have had to spray a little WD-40 oil into the shaft after which the problem no longer occurs but this only lasts about a month or two max.
Part of the reason for this is that I have methanol/water injection which "cleans" the shaft quickly of oil and it may dry out faster.
I believe that this is also made in China where the quality is poor...
The BBK FAQ section also mentions getting stuck:
https://bbkperformance.com/pages/tec...-throttle-body
