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Author Topic: 2013 SHO Throttle Body Adjustment Screw Leaking?  (Read 356 times)

Offline FiveLeeter918

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2013 SHO Throttle Body Adjustment Screw Leaking?
« on: June 12, 2019, 08:06:45 AM »
Been chasing a boost leak for the last few weeks, and last night I did a positive pressure test with soapy water at 12 psi and found that the adjustment screw on top of the throttle body is leaking like crazy, hundreds of bubbles a second.

Does anyone know if you can just replace this screw or if I have to replace the entire throttle body? I ordered a BBK unit to replace it for other reasons, but it's currently 3 weeks in on an unknown backorder time frame. If I can epoxy the damn screw to get it to stop leaking temporarily I might, but if I can just replace the screw that would be great too.
- Lee
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Offline SHOdded

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Re: 2013 SHO Throttle Body Adjustment Screw Leaking?
« Reply #1 on: June 12, 2019, 08:26:33 AM »
Adjustment screw?  Didn't know these ETBs had one.  Kindly post a pic with the part highlighted :)
2007 Ford Edge SEL, Powerstop F/R Brake Kit, TXT LED 6000K Lo & Hi Beams, W16W LED Reverse Bulbs, 3BSpec 2.5w Map Lights, 5W Cree rear dome lights, 5W Cree cargo light, DTBL LED Taillights

If tuned:  Take note of the strategy code as you return to stock (including 3 bar MAP to 2 bar MAP) -> take car in & get it serviced -> check strategy code when you get car back -> have tuner update your tune if the strategy code has changed -> reload tune -> ENJOY!

Offline FiveLeeter918

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Re: 2013 SHO Throttle Body Adjustment Screw Leaking?
« Reply #2 on: June 13, 2019, 08:09:15 AM »
maybe its not, but whatever this screw is here.
- Lee
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Offline glock-coma

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Re: 2013 SHO Throttle Body Adjustment Screw Leaking?
« Reply #3 on: June 13, 2019, 09:27:07 AM »
Would a leak that small actually make a difference at engine speed?
Not sure the AFR or desired boost would be affected
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Offline glock-coma

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Re: 2013 SHO Throttle Body Adjustment Screw Leaking?
« Reply #4 on: June 13, 2019, 09:29:21 AM »
That is probably a positive stop so the throttle blade cant go past 90

If you remove/replace it, it could affect the operation.
You could alway just use some non hardening Teflon sealant or Teflon tape 
2010 red candy metallic non PP 402B
AJPTURBO 2 BAR Tune Stock 14.1@100.3 / Tuned 12.83@107.7
K&N panel, RX OCC, Sp-534 @.30 Tint 50%F-35%R BOV bypass
1997 SHO silver frost (sold)
1990 SHO triple black 5-speed (saved my life)

Offline FiveLeeter918

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Re: 2013 SHO Throttle Body Adjustment Screw Leaking?
« Reply #5 on: June 13, 2019, 10:15:13 AM »
honestly not sure, but it's the only thing I can find and In currently seeing a 4 psi difference between TIP desired and actual and my LTFTs are at 28% currently.
- Lee
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Offline FiveLeeter918

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Re: 2013 SHO Throttle Body Adjustment Screw Leaking?
« Reply #6 on: June 13, 2019, 10:16:39 AM »
Heres a video of it under pressure and using soapy water

https://youtu.be/pAbTXBCgFIM
- Lee
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Offline FiveLeeter918

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Re: 2013 SHO Throttle Body Adjustment Screw Leaking?
« Reply #7 on: June 13, 2019, 10:18:44 AM »
it's actually leaking between. the steel housing and the brass insert. thought about epoxying the top and reclining the threads but was wanting to check if it was leaking for another reason first.
- Lee
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Offline SaveMelMac

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Re: 2013 SHO Throttle Body Adjustment Screw Leaking?
« Reply #8 on: June 13, 2019, 11:25:04 AM »
American muscle makes a TB under their house brand SR performance, looks to be a reboxed bbk. Little bit cheaper and they have them in stock if you dont want to wait.

Offline 4sfed

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Re: 2013 SHO Throttle Body Adjustment Screw Leaking?
« Reply #9 on: June 13, 2019, 11:38:13 AM »
I have a thought (in a long list of bad ones); that screw might have a rubber o ring on it. If you unscrew it (and THAT might be the bad idea), you might be able to replace the o ring.

I say that it might be a bad idea, because I don't know what's on the other end of that screw, or what that screw does.
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Offline FiveLeeter918

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Re: 2013 SHO Throttle Body Adjustment Screw Leaking?
« Reply #10 on: June 15, 2019, 11:48:08 PM »
So quick update, I grabbed my 10mm wrench, put it on there and crack, the "bolt" snapped in half. Turns out it was dry rotted plastic and there was a spring inside that flew up, hit the hood, and was subsequently sacrificed to the car gods.

30 wraps of electrical tape later to seal, car is still driving fine, BBK throttle body will be here Monday.

oye...
- Lee
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F-150, Mustang, Lincoln MKS, Taurus SHO and Ford Flex Tuning

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Offline SHOdded

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Re: 2013 SHO Throttle Body Adjustment Screw Leaking?
« Reply #11 on: June 16, 2019, 03:27:02 AM »
:o :o :o  Now we know, LOL.
2007 Ford Edge SEL, Powerstop F/R Brake Kit, TXT LED 6000K Lo & Hi Beams, W16W LED Reverse Bulbs, 3BSpec 2.5w Map Lights, 5W Cree rear dome lights, 5W Cree cargo light, DTBL LED Taillights

If tuned:  Take note of the strategy code as you return to stock (including 3 bar MAP to 2 bar MAP) -> take car in & get it serviced -> check strategy code when you get car back -> have tuner update your tune if the strategy code has changed -> reload tune -> ENJOY!

Offline FiveLeeter918

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Re: 2013 SHO Throttle Body Adjustment Screw Leaking?
« Reply #12 on: June 18, 2019, 07:32:23 AM »
So my BBK throttle body came in yesterday, haven't had a chance to install it yet but I opened it to inspect and for those curious, the piece that broke does appear to just be the throttle blade stop on the motor gears. Which has me really curious as to how fubared my throttle body was since for air to leak from there it would have to get from the throttle bore into the motor cavity first, then get bast the teflon seal on the plunger itself.

Ah well, at least we'll get it fixed tonight.
- Lee
Technical Sales, Ortiz Tuning and Performance
F-150, Mustang, Lincoln MKS, Taurus SHO and Ford Flex Tuning

Ortiz Performance Vendor Forum | Find us on Facebook! | Order a Tune!

Offline SHOdded

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Re: 2013 SHO Throttle Body Adjustment Screw Leaking?
« Reply #13 on: June 18, 2019, 08:57:10 AM »
A nice little side project :D
2007 Ford Edge SEL, Powerstop F/R Brake Kit, TXT LED 6000K Lo & Hi Beams, W16W LED Reverse Bulbs, 3BSpec 2.5w Map Lights, 5W Cree rear dome lights, 5W Cree cargo light, DTBL LED Taillights

If tuned:  Take note of the strategy code as you return to stock (including 3 bar MAP to 2 bar MAP) -> take car in & get it serviced -> check strategy code when you get car back -> have tuner update your tune if the strategy code has changed -> reload tune -> ENJOY!

 

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