REFLECTOR: VDO Fuel Sensor

[John Dibble]

I brought my VDO fuel sensor to an auto parts store.  He said he never 
heard of one being used for fuel, only for water applications.  Maybe 
that's the problem.  I left it with him and he will see if he can find a 
replacement.  I'll advise what I find out.

John

On 4/4/2012 12:59 PM, Scott Derrick wrote:
> Wish I would have known this before ordering a replacement VDO sensor 
> a couple days ago!!
>
> Thats probably why I have a high fuel pressure reading almost all the 
> time.
>
> GRT makes a fuel sender that the dynon talks to but it only goes to 
> 30psi.
>
> Scott
>
>
> -------- Original Message --------
> Subject: Re: REFLECTOR: Dynon fuel pressure
> From: Andrew Judge <ajudge at grovenetworks.com>
> To: 'reflector at tvbf.org' <reflector at tvbf.org>
> Date: 04/04/2012 11:03 AM
>
>> Add me to that list. High pressure FS always dies and fluctuates. 
>> Also add thee EGT probes. They die too.
>>
>> What's a good replacement for the fuel sensor for an injection engine?
>>
>> Andy
>>
>> ----- Original Message -----
>> From: Douglas Holub [mailto:douglas.holub at gmail.com]
>> Sent: Wednesday, April 04, 2012 12:59 PM
>> To: Velocity Aircraft Owners and Builders list<reflector at tvbf.org>
>> Subject: Re: REFLECTOR: Dynon fuel pressure
>>
>> Same with mine. The oil pressure is working fine but I need to 
>> replace the
>> fuel pressure sensor.
>> ----- Original Message -----
>> From: "John Dibble"<aminetech at bluefrog.com>
>> To: "Velocity Aircraft Owners and Builders list"<reflector at tvbf.org>
>> Sent: Wednesday, April 04, 2012 12:20 PM
>> Subject: Re: REFLECTOR: Dynon fuel pressure
>>
>>
>>> Thanks.  I replaced mine as well.  It's nice to know what the 
>>> problem is.
>>> My VDO oil pressure sensor has worked perfectly.  I wonder what the
>>> difference is.  Different mechanism?  Different pressure range?  Gas
>>> affects the sensor and oil doesn't?
>>>
>>> John
>>>
>>> On 4/4/2012 10:48 AM, Laurence Coen wrote:
>>>> John,
>>>>
>>>> I have a VDO fuel pressure gage that acts the same way.  I'm on my 
>>>> second
>>>> sender and opened the old one to see what was inside.  It's a pressure
>>>> operated rheostat and apparently the wiper arm starts making poor 
>>>> contact
>>>> with the wire wound resistance over time causing a false high reading.
>>>> It's a piece of junk in my opinion.
>>>>
>>>> Larry Coen
>>>> N136LC
>>>>
>>>> --------------------------------------------------
>>>> From: "John Dibble"<aminetech at bluefrog.com>
>>>> Sent: Tuesday, April 03, 2012 9:36 AM
>>>> To: "Velocity Aircraft Owners and Builders list"<reflector at tvbf.org>
>>>> Subject: Re: REFLECTOR: Dynon fuel pressure
>>>>
>>>>> I'm planning to relocate my oil VDO sensor to the engine where it's
>>>>> supposed to be and was also concerned about vibration.  What are you
>>>>> using for your connection?
>>>>>
>>>>> My 2 terminal VDO fuel pressure sensor also exhibits strange 
>>>>> readings.
>>>>> When I start the engine it always reads correct at 7 psig 
>>>>> (carburetor).
>>>>> Then after 30 minutes or so, it often runs 11-15 and sometimes up 
>>>>> to 25
>>>>> psig.  The readings are not very stable, so I don't believe them.  I
>>>>> think the wires may be bad.
>>>>>
>>>>> John
>>>>>
>>>>> On 4/2/2012 9:52 PM, Brian Michalk wrote:
>>>>>> Yes, VDO makes I thought all of their sensors in ungrounded and
>>>>>> grounded versions.  I have a few of them on the plane for oil 
>>>>>> pressure
>>>>>> and fuel pressure, which for me is 45PSI.
>>>>>>
>>>>>> None of mine are hard mounted to the engine.  I've heard that the
>>>>>> vibration can cause them to fail at the neck.  The orifice is a few
>>>>>> thousandths in diameter, really small, so if it does break off it 
>>>>>> won't
>>>>>> flow very much.
>>>>>
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>