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  #11  
Old 08-09-2018, 09:47 PM
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airguy airguy is offline
 
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Location: Garden City, Tx
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Possible, but highly unlikely, that you've killed two of these units. I would strongly suspect a wiring issue.
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Garden City, TX
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Built an off-plan 9A with too much fuel and too much HP. Should drop dead any minute now.
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  #12  
Old 08-09-2018, 11:32 PM
BobTurner BobTurner is offline
 
Join Date: Dec 2011
Location: Livermore, CA
Posts: 5,332
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Quote:
One thing to look at is voltage. The red cube runs off 5 volts, not 12. Most EIS systems provide a FF power pin, but some expect you to tie into the instrument's general 5 volt bus.

Larry
I think for some time now they accept 5 - 30 volts.
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  #13  
Old 08-10-2018, 06:55 AM
lr172 lr172 is offline
 
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Location: Schaumburg, IL
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Quote:
Originally Posted by BobTurner View Post
I think for some time now they accept 5 - 30 volts.
Thanks for clarifying. The fact that they ran for a few hours had me thinking something was burning up.

Larry
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  #14  
Old 08-10-2018, 07:12 AM
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DanH DanH is offline
 
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Location: 08A
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Quote:
Originally Posted by BobTurner View Post
I think for some time now they accept 5 - 30 volts.
8 to 30. Is it hooked to a 5V instrument power source?

https://buy-ei.com/wp-content/upload...Info-Rev-F.pdf
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RV-8 SS
Barrett IO-390
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  #15  
Old 08-10-2018, 07:49 AM
PipeDreamer PipeDreamer is offline
 
Join Date: Apr 2017
Location: Georgetown, Ontario
Posts: 45
Default Ground Check

Do a good ground connection check between the instrument chassis, Engine and fuselage. It could be some stray currents during the engine start, typically due to grounding issues.
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Alex Babiy
Georgetown Ontario
RV-7A In progress.
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  #16  
Old 08-10-2018, 08:55 AM
woxofswa woxofswa is offline
 
Join Date: Sep 2007
Location: Mesa Arizona
Posts: 505
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I have mine mounted under the front of the engine between the Bendix and the spider. I secured it to the case on a short piece of bent spring steel to give a little vibration absorption and in a position where the output is canted upwards a bit per OEM recommendation. Itís been dead on accurate and trouble free for over 500 hours.
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Myron Nelson
Mesa, AZ
N24EV
RV-10 BPE, Dynon, Airflow systems A/C
First flight May 10, 2014
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  #17  
Old 08-10-2018, 08:59 AM
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Lynnb Lynnb is offline
 
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Location: Cedar Hill, TX
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Quote:
Originally Posted by woxofswa View Post
I have mine mounted under the front of the engine between the Bendix and the spider. I secured it to the case on a short piece of bent spring steel to give a little vibration absorption and in a position where the output is canted upwards a bit per OEM recommendation. Itís been dead on accurate and trouble free for over 500 hours.
Myron, Do you have a picture of your install? Lynn
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  #18  
Old 08-10-2018, 12:38 PM
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JackinMichigan JackinMichigan is offline
 
Join Date: Nov 2012
Location: Canton, MI
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Quote:
Originally Posted by PipeDreamer View Post
Do a good ground connection check between the instrument chassis, Engine and fuselage. It could be some stray currents during the engine start, typically due to grounding issues.
The second one failed before the first engine start.
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RV-10 N1861G
Build #41389, started Oct 2012
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  #19  
Old 08-10-2018, 01:06 PM
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9GT 9GT is offline
 
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Location: Southern Michigan
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Quote:
Originally Posted by JackinMichigan View Post
The second one failed before the first engine start.
Highly unlikely that a brand new transducer failed before first engine start. No one blew air through it did they? I had mine mounted in my -10 in the tunnel after the electric fuel pump also. It was very accurate there in the -10. I wrapped it in fire sleeve for a little heat protection just because I had some on hand. I would start troubleshooting the wiring. Ping it out, verify and triple verify the pin-outs. Check if a pin got folded over. Check the wiring shield braid for a stray strand, or even a pin that has a stray wire strand poking out. A stray wire strand can cause intermittent issues. My buddy had one in his magneto that only acted up when the mag got hot on his G3i set-up. We spent a lot of time trouble shooting that one!
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Howell, MI

RV-9A: Under Construction. N161RV (Reserved)
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