I saw another forum about this but I am extremely lost and would really appreciate help. I just installed an ms3mini, basically an ms3. I haven't messed with the fuel pump or anything in the fuel system. When the key is turned to the on position, the fuel pump is meant to prime for two seconds, except mine won't stop priming. Any ideas? Thank you

 

The only wiring I did was installing a Wideband. I did tap into the door buzzer wire because its an ignition on power source, could that possibly cause an issue?

 

Switching the fuel pump jumper may do the trick. Its on the MS3 Mini board

 

Thank you for the response, I am really not familiar with ms at all, would you mind explaining this action a little more? Thank you

 

See https://www.miataturbo.net/megasquir...roblem-103489/

 

it would help us if you told us what year car
it would help yourself if you would rtfm

 

my bad for not saying what it was, 1.8 1995. Anyways I solved my issue. ms3 minis don't come in a case, so you have to use the old ecu case. Well one of the pins for the fuel pump was touching bare metal... grounded to the chassis... making the fuel pump continuously pump.