the Mrs' car had about 4 months and has been okay but randomly wont start


ignition on and the fuel pump relay clicks like crazy i wiggled it and it stopped and the pump primed

go to turn the engine over and it clicks away again and everything on the dash goes crazy rev and speedo needles wave all over the place engine warning like flashes like mad, engine wont trn over

ive given the TPS and MASS sensor plugs a wiggle too, battery is holding 13.4 volts fine


any help greatly appreciated