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stopdropanroll

06-25-2012 11:52 AM

454MAG MPI 5v reference?

I am looking for anything I can pull 5 volts from on my MPI, I am installing a electronic fuel pressure sending unit and it needs 5v reference, not sure if any of the Merc sensors on this motor use 5volt or not........HELP

keith2500hd

06-25-2012 10:03 PM

does the fuel pressure guage have power supply module available, i would use that. the 5v ref is set for the senders in circuit, 5.1 or 4.9v can cause troubles, newer engines will set guardian. tapping into that circuit may lead to quirks during operation.

stopdropanroll

06-26-2012 07:59 AM

Good point, my Gaffrig gauge does not have a supply, I may just go to a mechanical sending unit.

sutphen 30

06-26-2012 08:08 AM

here you go

http://www.ebay.com/itm/5-Volt-5V-DC...-/290592255754

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