Ok so I have been messing with this constant fuel pump issue for 2 days and frankly I am ready to set my MS on fire just to watch it burn. For those of you that didnt see my other post. When I connect my MS the fuel pump goes on and runs constantly. Is there any way to control the fuel pump without using the MS. I used the wiring diagram from rs-autotune.com and assume that the wiring is right since the pump does come on when the MS is connected and does not when the MS is unconnected. I really need some help here guys.

I had a simular problem when I first installed my Megasquirt. I don't exactly remember what was causing it. I think the relays were feeding voltage back to the MS and causing the fuel pump to run constant. I gave up and just let the stock ECU control the fuel pump.

So yours just runs off the stock ecu without a problem? I have to figure it out eventually but if I can run it like that for now thats perfect.

Yeah, it works just fine. I'm eventually going to have to fix it to where the MS controlls the pump also, because I'm going to eliminate the factory ECU all together.