Sticking Throttle?
Thread Starter
TECH Enthusiast
Joined: Jun 2009
Posts: 501
Likes: 0
From: Birmingham, Alabama
Sticking Throttle? Well I bought a Ported and Polished throttle body then, it went to the body shop so I really didnt get the feel for the throttle body yet, when I got it back I noticed that is was hard to give it throttle, and it is only like that when the car is on, im guessing because of the airflow, but when its off its easy, so what could be causing this?? 
thank you
thank you
Mine does the same thing after a give it some gas. I haven't figured out what to do about it yet, but it seems to not be as bad as it used to be. That might just be me getting used to it though.
It's not because of the airflow or because it's new. The blade is most likely dragging in the bore. Hold it up to light and see if the blade is touching the bore anywhere. If it is, take it apart, and use some emery cloth on the outside of the blade where it's touching. Just go a little bit at a time, reinstall and retest.
But he said it doesn't do it when the car is not running. If the blade was sticking on the bore it would do it when the car was off too. Mine is the same way and it gets worse when the motor is idling down after giving it gas. So, logic would tell us that the blade is being sucked shut because of the port and polish for some reason.
After P&Ping my throttle body, I had the same issue. It's a result of the engine vacuum sucking the bottom of the blade further back in the throttle body bore. My throttle body felt fine when it was off the car, and I kept adjusting it, but when I put it on the car it kept sticking.
The blade must be centered in order to not hang up and stick.
Hold it up to the light, more than likely you will not be able to see light around the lower half of the blade.
Fortunately, I have a light table at work and was able to adjust the blade to be centered, and now it has no hang-up at all, even with the idle screw as far down as it can go.
The blade must be centered in order to not hang up and stick.
Hold it up to the light, more than likely you will not be able to see light around the lower half of the blade.
Fortunately, I have a light table at work and was able to adjust the blade to be centered, and now it has no hang-up at all, even with the idle screw as far down as it can go.
But he said it doesn't do it when the car is not running. If the blade was sticking on the bore it would do it when the car was off too. Mine is the same way and it gets worse when the motor is idling down after giving it gas. So, logic would tell us that the blade is being sucked shut because of the port and polish for some reason.
BTW, my truck did this without a ported TB. 2000 Z-71, the tb's are the same FWIW.
Trending Topics
LS1 Tech Stories
The Best V8 Stories One Small Block at Time
Topdon ONE vs. Artidiag 800 BT2: Which is the Diagnostic Tablet For You?
Pouria Savadkouei
Gas Monkey Built a 6-Wheel Ferrari Testarossa With a Corvette LT4 Engine
Verdad Gallardo
7 Most Reliable High-Performance Engines GM Has Ever Built
Verdad Gallardo
Amazing '71 Camaro Restomod Is Modern Muscle Car Under the Skin
Verdad Gallardo
6 Common C5 Corvette Failures and What's Involved In Repairing Them
Pouria Savadkouei
Retro Modern Bandit Pontiac Trans AM Comes With Burt Reynolds' Autograph
Verdad Gallardo
Top 10 Greatest Cadillac V Series Performance Models Ever, Ranked
Pouria Savadkouei
Top 10 Most Powerful Chevy Trucks Ever Made!
Hennessey's New Supercharged Silverado ZR2 Has 700 HP
Verdad Gallardo
Correct. Vacuum will pull the blade closer to the housing. Another key thing to look out for is if it has the halfshaft mod and reusing the stock blade screws without washers. The stock blade screws are tapered to fit the front side of the throttle shaft, now that the front part is no longer there the taper is pusshing the blade to one side when its tightened down. Very common.
Thread Starter
TECH Enthusiast
Joined: Jun 2009
Posts: 501
Likes: 0
From: Birmingham, Alabama
Actually I never loosened the screws I just sanded the parts that were sticking and now it is 100% better, then I threw some polish on that hoe and it's running good now
