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oil pressure

in 912 / 914 Technical Questions 7 years ago
I've been having oil pressure fluctuations lately so I decided to install a new sender VDO it turned out not being compatible with my guage so I ordered a new guage from aircraft spruce aviasport IM-572 when I turn the master on guage goes all the way up to max this I'm told is normal when I start the engine it stays at max so took everything out and replaced with the old one am I doing something wrong in the instal only positive negative and sender wire i'm thinking bad sender any ideas

  • Re: oil pressure

    by » 7 years ago

    There are very different senders available. Particularly mind the way they function.
    The good old VDO sender basically delivers a resistance which changes over pressure. A gauge must obviously work with that resistance as input and the bandwidth of the sender.
    Other senders deliver voltage or even a digital signal. And those won't work with resistance-based gauges. Quite the same way a gauge expecting voltage will fail if resistance comes through.
    What gauge did you have installed originally and what senders (exactly) have you tried? Knowing that would help troubleshooting.
    Regards
    Peter
      
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  • Re: oil pressure

    by » 7 years ago

    isimg the VDO with the green dot with the aviasport IM-572 guage what im thinking is I probably fried the sender eith my old automotive type guage
      
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  • Re: oil pressure

    by » 7 years ago

    I'd like to suggest you check the basic functionality of both gauge and sender to start with.
    This seems to be a very helpful document:
    http://www.aviasport.com/pdf/Instruments/Datasheet_IM_572.pdf
    Also check the wiring according to the datasheet referenced.
    Good luck!
      
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