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  #1  
Old 10-25-2019, 06:42 PM
Brent 801's Avatar
Brent 801 Brent 801 is offline
 
Join Date: May 2012
Location: Conroe, TX
Posts: 37
Default G3X Erratic Engine indications

I'm in phase one testing with my new RV-14A. I have a persistent problem with MAP and Fuel Pressure indications simultaneously becoming erratic after about 30 minutes of flight. MAP begins fluctuating about .5 inch while FP fluctuates about 4 PSI. I've checked all connectors on the Stein built harnesses and they look fine. I've replaced the MAP sensor and tested the FP sensor with regulated air pressure. I've had 2 A&Ps and an avionics tech look over my installation. I'm about to replace the GEA-24.

Has anyone had a similar experience?

Brent
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  #2  
Old 10-25-2019, 08:02 PM
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mulde35d mulde35d is offline
 
Join Date: Dec 2017
Location: Williamsburg, VA
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Default likely checked

You probably already checked, but would ask if you have the modified oil/fuel restrictor fitting on the fuel pressure port. I have also seen -3 hose used for manifold pressure as opposed to -4. Curious what size hose you have.

Of note, I am not flying yet and simply offering areas that may be a factor based upon internet research alone.
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  #3  
Old 10-26-2019, 12:51 AM
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bjdecker bjdecker is offline
 
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Location: Georgetown, TX
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Default Fluctuating MAP on G3X

I had a problem with MAP becoming erratic as the engine RPM approached 2400 RPM. My MAP line was installed per Van's plans on an IO-360-Axxx engine.

Garmin recommends installing an Omega Engineering PS-8G snubber/restrictor on the MAP line at the transducer.

B
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  #4  
Old 10-27-2019, 05:31 PM
Tom023 Tom023 is offline
 
Join Date: Jul 2011
Location: Cypress, TX
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Default

Just got back from 4 hour flight and mine acts similarly. My MP fluctuates upto about 0.8 or 0.9, FP was fluctuating a few PSI. Just my opinion but probably nothing to worry about. If these were analog gauges wouldn’t even be noticeable.
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  #5  
Old 11-09-2019, 04:36 PM
Brent 801's Avatar
Brent 801 Brent 801 is offline
 
Join Date: May 2012
Location: Conroe, TX
Posts: 37
Default

A new GEA-24 solved the problem.
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