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  #1  
Old 01-15-2021, 10:41 AM
wawrzynskivp wawrzynskivp is offline
 
Join Date: Feb 2018
Location: san jose
Posts: 38
Default Fouling Sniffle Valve

Hey All,

I am experiencing my third fouling of my sniffle valve. IO 390 with Superior Cold Sump and Airflow Performance FM-200. Sniffle is fouling and sticks open providing enough manifold leak to disrupt idle mixture.

Removing and cleaning with solvent provides 10-15 hrs of normal operation.

Build is Lycoming Thunderbolt. Engine does weep small amount of oil down intake tube that Lycoming considers 'normal.' Sniffle is the $100+ model from Spruce.

Any thoughts here? Right now I am jamming a plug in the drain tube preflight and removing post flight.
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  #2  
Old 01-15-2021, 10:49 AM
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FasGlas FasGlas is offline
 
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I never installed one on my ECI cold induction. Never had a problem.
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  #3  
Old 01-15-2021, 11:16 AM
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AX-O AX-O is offline
 
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Buy the one from Don at Airflow Performance. They are a very nice company to work with and, the valve is cheap and works well. It is a simple AN fitting with a metal ball and pin.

I had the same issue as you twice. This fixed it.
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  #4  
Old 01-15-2021, 11:21 AM
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Mark Dickens Mark Dickens is offline
 
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Location: Collierville, TN (KFYE)
Posts: 1,441
Default

Quote:
Originally Posted by wawrzynskivp View Post
Hey All,

I am experiencing my third fouling of my sniffle valve. IO 390 with Superior Cold Sump and Airflow Performance FM-200. Sniffle is fouling and sticks open providing enough manifold leak to disrupt idle mixture.

Removing and cleaning with solvent provides 10-15 hrs of normal operation.

Build is Lycoming Thunderbolt. Engine does weep small amount of oil down intake tube that Lycoming considers 'normal.' Sniffle is the $100+ model from Spruce.

Any thoughts here? Right now I am jamming a plug in the drain tube preflight and removing post flight.
I had exactly the same problem with the Lycoming sniffle valve. I tried cleaning it up as well with no luck. I bought the Airflow Performance sniffle valve which is easy to clean and no problems since. The problem with the Lycoming part, aside from an exorbitant price is that you can't get access to the innards for a good cleaning. Airflow Performance's version is a lot cheaper and simpler. See https://airflowperformance.com/index...anifold-drain/
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  #5  
Old 01-15-2021, 02:51 PM
wawrzynskivp wawrzynskivp is offline
 
Join Date: Feb 2018
Location: san jose
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Default Reccomendation

Thanks folks, that is really helpful.
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  #6  
Old 01-15-2021, 04:57 PM
Jpm757 Jpm757 is offline
 
Join Date: May 2013
Location: Sherman, CT
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Anybody know which valve Van's supplies with the FWF kit?
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  #7  
Old 01-15-2021, 05:17 PM
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bjdecker bjdecker is offline
 
Join Date: Jun 2005
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IIRC the sniffle comes with the engine "bag of parts" and it's the Lycoming Part #75444 for the IO-360-A1B6

https://shop.vansaircraft.com/cgi-bi...=Sniffle-valve
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