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Posted

Wow, I'm having my EDM 900 installed this coming week and I can't wait. I have one question wrt the fuel gauges:

Were yours also a little erratic at times and sort not indicating precisely? And are they accurate on the EDM 900 without you having done anyting to the sender units inside the tanks?

I'm going to have mine connected and if the sender prove to be faulty, I'll take it from there. Most seem to blame the fuel senders, but how good are the actual indicators on the panel after 40 odd years?

Posted

Among all the other things it does I finally have a fuel gauge that reads correctly.

 

Not to rain on a parade or anything, but it only reads what the sensors tell it. Did you replace the tank senders by any chance?

 

I am asking because when i installed my MVP-50 I was ecstatic over the display and all it tells me, but the tanks still have the very nonlinear floats and pots. EI makes custom magnetic level sensors, but they are a bit pricey.

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Posted

I kept the old senders. JPI Uses a 5 point calibration table, so as long as the senders are functional and repeatable the actual value of them at a particular position isn't important. You get the pick up to 5 points for the calibration. I used empty, 1/4,1/2,3/4 and full.

From what I can tell so for it is reading correctly. Yes, I removed all the old gauges.

  • Like 1
Posted

Snazzy. I'm getting the 900 installed too. Why was the fuel pressure 14 psi at the bottom and. 15 psi on the right of the gauge?

The one on the top updates continuously. The one on the bottom scrolls through a list of functions displaying each one for some predetermined amount of time. I don't think it changes once it is displayed. You can set the scroll rate for the list.

Posted

Price and because I already had a JPI and was able to swap it out without having to remove everything and start over. 2 of the wiring harnesses and many of the sensors were the same pn.

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