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High fuel pressure

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Jerry Cochran

Joined: 10 Jan 2006
Posts: 111
Location: Wilsonville, OR

Posted: Wed Apr 21, 2010 7:48 am Post subject: High fuel pressure

Folks,



Re-posting from VAF, no joy over there but hope there might be someone here with an idea...



Normally my fuel pressure with the mech pump runs 30-35 psi and with the boost on goes to 40-ish. Suddenly the other day I got a warning on my GRT EFIS when the pressure went to 190 psi and that has continued since, so am very reluctant to fly until this is sorted out. No engine stumbles or anything otherwise abnormal. Fuel flow is fine. 



This is an injected Bendix system on an IO-360 with 160 trouble free hours since new.



I've never heard of this before, so if anyone here has ideas, advice, answers, please respond.



BTW, I love that the EFIS picked this out for me and sent up the flag, very handy.



Thanks all,



Jerry Cochran



 



 



--

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nuckolls.bob(at)aeroelect
Guest

Posted: Wed Apr 21, 2010 8:04 am Post subject: High fuel pressure

At 10:46 AM 4/21/2010, you wrote:

  	  Quote: 	
		  

 Folks,



 Re-posting from VAF, no joy over there but hope there might be someone here with an idea...



 Normally my fuel pressure with the mech pump runs 30-35 psi and with the boost on goes to 40-ish. Suddenly the other day I got a warning on my GRT EFIS when the pressure went to 190 psi and that has continued since, so am very reluctant to fly until this is sorted out. No engine stumbles or anything otherwise abnormal. Fuel flow is fine. 



 This is an injected Bendix system on an IO-360 with 160 trouble free hours since new.



 I've never heard of this before, so if anyone here has ideas, advice, answers, please respond.



 BTW, I love that the EFIS picked this out for me and sent up the flag, very handy. 	


    Is the pump really capable of that kind of pressure?

    A failure of a relief valve might account for an

    unexpected rise in pressure but I'd be suspicious

    of the EFIS pressure transducer too. It's MUCH

    more complicated than that spring-loaded relief

    valve. Double check with a simple dial-gauge.



    Bob . . .    [quote][b]

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doug.ilg(at)verizon.net
Guest

Posted: Wed Apr 21, 2010 8:45 am Post subject: High fuel pressure

Have you (re-)checked the accuracy of the sensor?  Did you accidentally change a calibration factor in the EFIS?  That's a HUGE jump.

 

 

Doug Ilg

Grumman Tiger N74818, College Park Airport (KCGS), Maryland 

Challenger II LSS LW (N641LG reserved) - kit underway at Laurel Suburban (W18)

 

  



 [quote] 

 From: "jerry2dt(at)aol.com" <jerry2dt(at)aol.com>

To: aeroelectric-list(at)matronics.com

Sent: Wed, April 21, 2010 11:46:44 AM

Subject: High fuel pressure



    Folks,



Re-posting from VAF, no joy over there but hope there might be someone here with an idea...



Normally my fuel pressure with the mech pump runs 30-35 psi and with the boost on goes to 40-ish. Suddenly the other day I got a warning on my GRT EFIS when the pressure went to 190 psi and that has continued since, so am very reluctant to fly until this is sorted out. No engine stumbles or anything otherwise abnormal. Fuel flow is fine. 





[b]

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bob.verwey(at)gmail.com
Guest

Posted: Wed Apr 21, 2010 8:52 am Post subject: High fuel pressure

Can only be a sender unit problem IMHO...pump would not be able to make this kind of pressure.

  

 regards

 Bob Verwey

 On 21 April 2010 17:46, <jerry2dt(at)aol.com (jerry2dt(at)aol.com)> wrote:

 [quote]    Folks,



Re-posting from VAF, no joy over there but hope there might be someone here with an idea...



Normally my fuel pressure with the mech pump runs 30-35 psi and with the boost on goes to 40-ish. Suddenly the other day I got a warning on my GRT EFIS when the pressure went to 190 psi and that has continued since, so am very reluctant to fly until this is sorted out. No engine stumbles or anything otherwise abnormal. Fuel flow is fine. 

 

This is an injected Bendix system on an IO-360 with 160 trouble free hours since new.



I've never heard of this before, so if anyone here has ideas, advice, answers, please respond.

 

BTW, I love that the EFIS picked this out for me and sent up the flag, very handy.



Thanks all,



Jerry Cochran

 

 



 



 --

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saolesen(at)sirentel.net
Guest

Posted: Wed Apr 21, 2010 9:40 am Post subject: High fuel pressure

Jerry,



 I had a similar problem with an occasional high reading.  A new ground wire to the sender took care of the problem.

Sheldon Olesen



On Apr 21, 2010, at 10:46 AM, jerry2dt(at)aol.com (jerry2dt(at)aol.com) wrote:

[quote]                                                    Folks,

 

 Re-posting from VAF, no joy over there but hope there might be someone here with an idea...

 

 Normally my fuel pressure with the mech  pump runs 30-35 psi and with the boost on goes to 40-ish. Suddenly the  other day I got a warning on my GRT EFIS when the pressure went to 190  psi and that has continued since, so am very reluctant to fly until this  is sorted out. No engine stumbles or anything otherwise abnormal. Fuel  flow is fine. 

  

  This is an injected Bendix system on an IO-360 with 160 trouble free  hours since new.

  

  I've never heard of this before, so if anyone here has ideas, advice,  answers, please respond.

 

 BTW, I love that the EFIS picked this out for me and sent up the flag, very handy.

 

 Thanks all,

 

 Jerry Cochran

 

 

  

   

 

   

 

  --

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tim2542(at)sbcglobal.net
Guest

Posted: Wed Apr 21, 2010 4:07 pm Post subject: High fuel pressure

I bought all my GRT stuff new but second hand and had it shipped to GRT for inspection. They asked me if I wanted to swap out the fuel sender for the "good" one. I did this and was told the standard one has a rather short life expectancy. If you find its the sender you might get the good one this time.

 Tim A



 

   From: "jerry2dt(at)aol.com" <jerry2dt(at)aol.com>

To: aeroelectric-list(at)matronics.com

Sent: Wed, April 21, 2010 8:46:44 AM

Subject: High fuel pressure



    Folks,



Re-posting from VAF, no joy over there but hope there might be someone here with an idea...



Normally my fuel pressure with the mech pump runs 30-35 psi and with the boost on goes to 40-ish. Suddenly the other day I got a warning on my GRT EFIS when the pressure went to 190 psi and that has continued since, so am very reluctant to fly until this is sorted out. No engine stumbles or anything otherwise abnormal. Fuel flow is fine. 



This is an injected Bendix system on an IO-360 with 160 trouble free hours since new.



I've never heard of this before, so if anyone here has ideas, advice, answers, please respond.



BTW, I love that the EFIS picked this out for me and sent up the flag, very handy.



Thanks all,



Jerry Cochran

 

 



 



 --

- The Matronics AeroElectric-List Email Forum -

Use the List Feature Navigator to browse the many List utilities available such as the Email Subscriptions page, Archive Search & Download, 7-Day Browse, Chat, FAQ, Photoshare, and much more:

http://www.matronics.com/Navigator?AeroElectric-List

bakerocb

Joined: 15 Jan 2006
Posts: 727
Location: FAIRFAX VA

Posted: Thu Apr 22, 2010 5:16 am Post subject: High fuel pressure

4/22/2010



Hello Jerry, Like other suggestions I suggest that you look to the fuel 

pressure transducer.



The fuel pressure on my TCM IO-240 B9B engine suddenly went from the 9 PSI 

range to 54 PSI as reported by my Vision Microsystems engine data 

instrumentation system.



In the process of disconnecting the transducer electrical plug for trouble 

shooting and reconnecting it the problem disappeared. Evidently some 

vibration or corrosion had opened one of the four connections.



The trouble shooting and self curing saved me $400.00 for a new transducer.



'OC' Says: "The best investment we can make is the effort to gather and 

understand knowledge."



====================================================



Time: 08:48:57 AM PST US

Subject: High fuel pressure

From: jerry2dt(at)aol.com



Folks,



Re-posting from VAF, no joy over there but hope there might be someone her

e with an idea...



Normally my fuel pressure with the mech pump runs 30-35 psi and with the

 boost on goes to 40-ish. Suddenly the other day I got a warning on my GRT

 EFIS when the pressure went to 190 psi and that has continued since, so

 am very reluctant to fly until this is sorted out. No engine stumbles or

 anything otherwise abnormal. Fuel flow is fine.



This is an injected Bendix system on an IO-360 with 160 trouble free hours

 since new.



I've never heard of this before, so if anyone here has ideas, advice, answ

ers, please respond.



BTW, I love that the EFIS picked this out for me and sent up the flag, ver

y handy.



Thanks all,



Jerry Cochran

- The Matronics AeroElectric-List Email Forum -

Use the List Feature Navigator to browse the many List utilities available such as the Email Subscriptions page, Archive Search & Download, 7-Day Browse, Chat, FAQ, Photoshare, and much more:

http://www.matronics.com/Navigator?AeroElectric-List

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