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Fuel Odor in Cockpit

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ChangDriver

Joined: 15 Sep 2007
Posts: 266

Posted: Mon Jun 29, 2009 7:22 am Post subject: Fuel Odor in Cockpit

I am new to owning a CJ.  The plane has a very strong fuel odor in the cockpit.  It is not present after the plane has been sitting in the hangar even with the canopy closed.  I've opened the access door for the header tank on the belly and it is dry.  Not weeping from the wings that I can see either.  The smell becomes noticeable after engine start and does not go away.  So I have been suspect of something forward of the firewall but find nothing leaking there either.



Any ideas are welcome as to where to look.



Thanks,



Craig

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jlpartington(at)att.net
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Posted: Mon Jun 29, 2009 7:51 am Post subject: Fuel Odor in Cockpit

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dougsappllc(at)gmail.com
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Posted: Mon Jun 29, 2009 8:41 am Post subject: Fuel Odor in Cockpit

Check to make sure that the fittings at the primer are secure.   Also check to make sure that the wobble pump is not leaking.  To check both of these items remove the right hand kick panel in the front pit.  The wobble pump may be leaking fuel when you pump up pressure on start up, same with the primer.  Let me know what you find. 



Always Yakin,

doug



On Mon, Jun 29, 2009 at 8:22 AM, Craig Winkelmann <capav8r(at)gmail.com (capav8r(at)gmail.com)> wrote:

  	  Quote: 	
		  --> Yak-List message posted by: "Craig Winkelmann" <capav8r(at)gmail.com (capav8r(at)gmail.com)>

  

 I am new to owning a CJ.  The plane has a very strong fuel odor in the cockpit.  It is not present after the plane has been sitting in the hangar even with the canopy closed.  I've opened the access door for the header tank on the belly and it is dry.  Not weeping from the wings that I can see either.  The smell becomes noticeable after engine start and does not go away.  So I have been suspect of something forward of the firewall but find nothing leaking there either.

  

 Any ideas are welcome as to where to look.

 

 Thanks,

 

 Craig

 

 

 

 

 Read this topic online here:

 

 http://forums.matronics.com/viewtopic.php?p=250590#250590

 

 

 

 

 

 

 

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-- 

Always Yakin,

Doug Sapp

Phone 509-826-4610

Fax 509-826-3644

 

  [quote][b]

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dsavarese0812(at)bellsout
Guest

Posted: Mon Jun 29, 2009 8:54 am Post subject: Fuel Odor in Cockpit

Craig,

 Have you looked at the fuel pressure senders which are located  on the back side of the firewall on the right?  Remove the large inspection  panel on the right and look on the back side of the firewall, down low toward  the bottom-right and forward of the false firewall.  They should be  painted yellow in the center.  Sounds like it pressure  related.

 Dennis

  

 [quote]   ---

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talew(at)bellsouth.net
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Posted: Mon Jun 29, 2009 10:42 am Post subject: Fuel Odor in Cockpit

Craig, 

I would start with the primer.

Terry

-------------- Original message ----------------------

From: "Craig Winkelmann" <capav8r(at)gmail.com>

 	  Quote: 	
		  

 

 

I am new to owning a CJ.  The plane has a very strong fuel odor in the cockpit.  
	


It is not present after the plane has been sitting in the hangar even with the 

canopy closed.  I've opened the access door for the header tank on the belly and 

it is dry.  Not weeping from the wings that I can see either.  The smell becomes 

noticeable after engine start and does not go away.  So I have been suspect of 

 	  Quote: 	
		   something forward of the firewall but find nothing leaking there either.

 

 Any ideas are welcome as to where to look.

 

 Thanks,

 

 Craig

 

 

 

 

 Read this topic online here:

 

 http://forums.matronics.com/viewtopic.php?p 50590#250590

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bwade154(at)yahoo.com
Guest

Posted: Mon Jun 29, 2009 11:20 am Post subject: Fuel Odor in Cockpit

Also check your fuel lines by hand shortly after having pressure in them, I fly a Yak and Russian rubber sucks had a small primer fuel line leak - weep about three inches from the fitting

   From: Craig Winkelmann <capav8r(at)gmail.com>

To: yak-list(at)matronics.com

Sent: Monday, June 29, 2009 11:22:48 AM

Subject: Fuel Odor in Cockpit

--> Yak-List message posted by: "Craig Winkelmann" <capav8r(at)gmail.com (capav8r(at)gmail.com)>

I am new to owning a CJ.  The plane has a very strong fuel odor in the cockpit.  It is not present after the plane has been sitting in the hangar even with the canopy closed.  I've opened the access door for the header tank on the belly and it is dry.  Not weeping from the wings that I can see either.  The smell becomes noticeable after engine start and does not go away.  So I have been suspect of something  forward of the firewall but find nothing leaking there either.

Any ideas are welcome as to where to look.

Thanks,

Craig

Read this topic online here:

http://forums.matronics.com/========================

         [quote][b]

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ChangDriver

Joined: 15 Sep 2007
Posts: 266

Posted: Wed Jul 01, 2009 1:55 pm Post subject: Re: Fuel Odor in Cockpit

Thanks to all for the advice.  



We checked out the wobble pump and primer and they checked out fine.  Removed the plate to check the transducers and ran the engine.  The person observing said it looked like someone was taking a piss - not just a drip (like an old guy), but a spray (like some young buck) of fuel.



The plane has recently had some new avionics placed in it and a new fuel pressure transducer was put it.  The installer put a 1/8 inch thick washer against the firewall and a fitting from the fuel line to the transducer.  So, when the fitting was tightened, it snugged against the firewall and washer but did not seal the line.  It was nicely safety wired in place too.



So, that problem is solved!



Thanks again to all who responded.  I am actually glad it is not the wobble pump or primer as those look a bit more difficult to fix that the current problem.



Craig W.

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valleyauto(at)clearwire.n
Guest

Posted: Wed Jul 01, 2009 4:14 pm Post subject: Fuel Odor in Cockpit

How young would you guess?

---

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keithmckinley

Joined: 11 Aug 2008
Posts: 434

Posted: Thu Jul 02, 2009 4:06 am Post subject: Re: Fuel Odor in Cockpit

I'm 52 and can top a Volkswagen.

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