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  #1  
Old 08-13-2021, 10:19 AM
NYTOM NYTOM is offline
 
Join Date: Jun 2005
Location: Raleigh, North Carolina
Posts: 1,182
Default EIS 4000 fuel pressure sender

Having a problem with the VDO 0-30 psi senders reading very low pressures in the 0 to 3 psi range. Have tried two so far. Just wondering if anyone has found a replacement with maybe a 0 to 15 lbs range that might be a little more accurate or at least read very low pressures better. Thanks for any help.
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Tom Norwood
Classic "Short Tail 6A N822PM
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  #2  
Old 08-13-2021, 11:09 AM
BH1166 BH1166 is offline
 
Join Date: Nov 2017
Location: Eatonton Georgia
Posts: 513
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Quote:
Originally Posted by NYTOM View Post
Having a problem with the VDO 0-30 psi senders reading very low pressures in the 0 to 3 psi range. Have tried two so far. Just wondering if anyone has found a replacement with maybe a 0 to 15 lbs range that might be a little more accurate or at least read very low pressures better. Thanks for any help.
For carb engines this is what is recommended and what I use. Not sure I’ve heard of anything other to use. Also, worth checking and make sure the proper ohm resistor is on the AUX pin you are using. Also when setting up scale and offset, check before creating pressure you Aux for fuel pressure is reading zero. Good luck.
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Butch
RV6A Purchased N72TX
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  #3  
Old 08-13-2021, 11:43 AM
NYTOM NYTOM is offline
 
Join Date: Jun 2005
Location: Raleigh, North Carolina
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Thanks for the brain jog Butch. Originally installed this a long time ago and forgot about the different resistors for different ranges. As I recall I set it up for 30lbs which was probably too high for my use.
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Classic "Short Tail 6A N822PM
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  #4  
Old 08-30-2021, 07:24 AM
NYTOM NYTOM is offline
 
Join Date: Jun 2005
Location: Raleigh, North Carolina
Posts: 1,182
Default Update on VDO sender

Turns out my settings and resistor value were correct but the sending unit failed.
Saw a article about a kit manufacturer abandoning the VDO units because they’er not generally reliable due to heat and vibration and that they’er actually manufactured by a third party for VDO. Installed a new VDO unit in the Van’s sender manifold on the firewall and insulated with firesleeve. I plan to try to eliminate some of the vibration with a short hose from Tom at TS and a floating type unit support at the next condition inspection. New one works great with readings to a fraction of a pound. It’s always something.
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Classic "Short Tail 6A N822PM
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  #5  
Old 08-30-2021, 08:33 AM
BH1166 BH1166 is offline
 
Join Date: Nov 2017
Location: Eatonton Georgia
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Good to hear it’s fixed…my issues have never been reading low, but high. I agree, something lacking in the use of this sender in aircraft. My older 6A has no manifold, but a bracket which mounts all to the firewall.
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