Megasquirt & Fuel pump woes Options

[3d914]

Hey all you Squirters,

I finally finished the new wiring harness for the ECU & relay board on my MS install.

Did any of you have to bypass the stock Fuel pump relay to use the MS relay board's fuel pump relay?

Initially for fuel pump control I ran the #19 wire from the white connector on the stock relay board to the MS ECU.

Now that I'm using the MS relay board, my fuel pumps not coming on when connected to it. Fuse checks out, and if I run the single ground wire for the FP to engine ground instead of the MS relay board - FP runs fine.

Any thoughts?

TIA

[3d914]

OK Dave,

I see what you're describing. You rewired the FP directly for the MS relay board. That makes sense.

Where I'm running into trouble (I think) is that I'm only taking the ground side of the FP connection (#19 wire from stock relay board) and running that to the MS relay board. THey're both ground so that parts fine.

What's messing me up is that the #19 wire on the stock board comes after the FP relay, then goes to the other relay on the MS board.

I'm now going to get the FP ground side from in front of the stock relay (bypassing it) and run it to the MS relay. Then all should be fine.

Thanks for letting me think out loud. (IMG:style_emoticons/default/wacko.gif)