M16ta
M16ta New Reader
6/28/16 2:08 p.m.

Hello hive! Need some Megasquirt gurus input. Have a DIYPNP that I bought used, rewired correctly, and was able to connect to last year. Shelved the project, and am now getting back into in. Computer now can't connect to it, so poked around and I am getting 11v at VREF, and it creeps up more and more as I leave it plugged in (StimPower from DIYAutoTune). Pretty sure that's supposed to be at 5v or so, and not creep up. Any thoughts from everyone? For reference, it's built for a 94-95 Miata. Again: was able to connect to it and load firmware and program about a year ago, but now it won't connect.

dean1484
dean1484 GRM+ Memberand MegaDork
6/28/16 2:25 p.m.

Reference for what? I know that if you are using a TPS and it is a simple on/of TPS like in the early Porsche's you need to put a resistor in the circuit to prevent voltage creep in that circuit. I had to do that untill I swapped in the TPS from a turbo that has a pot on it to let me use TPS for tuning and other things like letting me turn on the fans on at WOT or at idle that overrides the temp sensor or the manual fan switch in the car.

M16ta
M16ta New Reader
6/28/16 2:59 p.m.

Uh... should have prefaced with "first timer with Megasquirt". I'm measuring at VREF and any of the ground spots on the board.

MadScientistMatt
MadScientistMatt PowerDork
6/29/16 8:13 a.m.

Does it stay at 11 volts if you remove the MicroSquirt Module?

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