Sticking dragon throttle body

[Pollardhimself]

Did some reading on whats the best method to fix the sticking throttle with hanging idle? Just had it tuned yesterday wasn't really aware of the issue till afterwards. Did some reading on this post http://www.svtperformance.com/forums/engine-tuning-214/868993-dragon-tb-driving-me-crazy.html anyone else had luck fixing the issue if so how?

 

[cobracide]

Start turning the screw in to push the blade open until it doesn't stick. Start with a 1/4 turn in from just touching.

 

[Shadow Grey 03]

I guess I just got lucky with mine. It will idle a little high while coasting, then come down to 800-900 once stopped. Literally right after I stop the car the idle drops to that.

 

[cobracide]

I guess I just got lucky with mine. It will idle a little high while coasting, then come down to 800-900 once stopped. Literally right after I stop the car the idle drops to that.

My favorite is when you gun it and then drop out of it.. guaranteed stall.

 

[Pollardhimself]

Well I've got the sticking throttle issue and hanging idle to a tolerable level now but I have an error (IDLE AIR CONTROL SYSTEM RPM HIGHER THAN EXPECTED) any idea how to fix this.

 

[KINGCOBRA86]

Return spring worked for me, got one from the auto pares store were all the sbc/carb stuff is

 

[cobracide]

Return spring worked for me, got one from the auto pares store were all the sbc/carb stuff is

OMFG like a virus.

 

[cobracide]

Well I've got the sticking throttle issue and hanging idle to a tolerable level now but I have an error (IDLE AIR CONTROL SYSTEM RPM HIGHER THAN EXPECTED) any idea how to fix this.

Ir's because of your high idle, get it below 1k. Reset the PCM.

 

[Pollardhimself]

Ir's because of your high idle, get it below 1k. Reset the PCM.

Hard to get the idle to come down with the throttlebody set screw all the way out not touching it sits a 950-1050ish. Ill try again

 

[Shadow Grey 03]

My favorite is when you gun it and then drop out of it.. guaranteed stall.

I haven't had that issue either.

 

[cobracide]

Hard to get the idle to come down with the throttlebody set screw all the way out not touching it sits a 950-1050ish. Ill try again

Start with it touching and go in a 1/4. Adding a little air helps the IAC with the idle. A little counter-intuitive.

 

[Pollardhimself]

Start with it touching and go in a 1/4. Adding a little air helps the IAC with the idle. A little counter-intuitive.

Thanks for the help ill give it a try today after work if it isn't still raining.

 

[Pollardhimself]

Start with it touching and go in a 1/4. Adding a little air helps the IAC with the idle. A little counter-intuitive.

I've tired everything nothing seems to work.. guess ill run it back by the tuner

 

[04sneaky_snake]

I had to resand the inner tubing of mine.

My TB was so bad, that with the screw backed all the way out, the TB would shut and lock itself against the inside walls of the TB. Causing the car to stall, and the gas pedal to be stuck because it couldn't force it back open.

So I too the TB apart, pulled the blade out, and started sanding. Now I'm down from a 1200-ish idle to a smooth 750 and lower depending on the set screw.

Would also recommend blocking off the IAC (works even better without it actually) and sanding the TB inside. It'll take a few tries to get it right, but IMO it was a faulty design to begin. Tolerances were way too tight to work right.

Also make sure you polish it back out after sanding or you may still have some issues with the blade catching or hanging on the burrs.

 

[Pollardhimself]

I had to resand the inner tubing of mine.

My TB was so bad, that with the screw backed all the way out, the TB would shut and lock itself against the inside walls of the TB. Causing the car to stall, and the gas pedal to be stuck because it couldn't force it back open.

So I too the TB apart, pulled the blade out, and started sanding. Now I'm down from a 1200-ish idle to a smooth 750 and lower depending on the set screw.

Would also recommend blocking off the IAC (works even better without it actually) and sanding the TB inside. It'll take a few tries to get it right, but IMO it was a faulty design to begin. Tolerances were way too tight to work right.

Also make sure you polish it back out after sanding or you may still have some issues with the blade catching or hanging on the burrs.

It doesn't stick when the cars off so I was thinking it needs to be re-tuned. Does the vacuum cause it to move a little which causes it to stick? Guess Ill pull it off and sand it as a last ditch effort. Even with my set screw all the way out I'm over a 1000.

 

[silverserpant]

Unplug your IAC and see what rpm the tb is allowing the car to idle. I set mine up with IAC unplugged and turned the screw until the idles matched between the TB and the plug in IAC . It go trid of my hanging issue aswell. The pcm goes crazy trying to catch up if the Tb is allowing in more or less air then what the pcm wants to run idle at.

 

[silverserpant]

Also after you get it all set up, unplug your battery and turn the light switch on to drain the memory. Let it sit fo r10 minutes. When you restart the car is will relearn and help with corrections.

 

[Pollardhimself]

It doesn't stick when the cars off so I was thinking it needs to be re-tuned. Does the vacuum cause it to move a little which causes it to stick? Guess Ill pull it off and sand it as a last ditch effort. Even with my set screw all the way out I'm over a 1000.

Boy this went way bad, I checked the clearance and sanded a little. Now it idles at 2-3 grand I think I took to much off :lol1:. Guess ill send it back to dragon for tweaking and repair.:uh oh: If it doesn't work right after it comes back guess im selling it and trying another brand.

 

[Pollardhimself]

Hmm wonder how hard its going to be to get ahold of stefan :cuss:

 

[Pollardhimself]

His website email doesn't work but this one does [email protected]