ALFAGTV6.COM

I'm in the process of installing an MS-II (v3) into my GTV6 racecar. Have most things sorted out prior to plugging in and firing up, but based on the posts I've found here and in the MSefi forum, I'm not 100% on how to mod the fuel pump drive. The attached is the last I've found as listed in a post by Murray, but I couldn't find confirmation that this worked.

Can anyone confirm this is correct, or do you have an updated schematic?

Thanks,
Kevin

Kevin in my case I chickened out,and ran a relay instead.I run the relay coil between 12v (taken off the starter terminal block on the firewall ) and the other side goes to the meagasquirt fuel pump ground.I tapped into the fuel pump feed from the combo-relay and it works fine.I decided I didn't want to be a guinea pig and fry my MS board.

Murray;

Thanks for the explanation...if you don't mind, a couple other points of clarification...

1. MS fuel pump ground -- you are referring to pin 37 from DB37, correct?
2. If I understand correctly -- you are still using the MS to provide signal to turn on the fuel pump, and simply bypassing the combo relay?

So the fuel pump still will not run unless the engine is being cranked or is running?

Thanks,
Kevin

MS fuel pump ground -- you are referring to pin 37 from DB37, correct?
-Yes that is correct

2. If I understand correctly -- you are still using the MS to provide signal to turn on the fuel pump, and simply bypassing the combo relay?

-I didn't actually bypass the combo-relay I cut the wire from the combo-relay +12v to the pump and fed it through the MS controlled relay contact.

So the fuel pump still will not run unless the engine is being cranked or is running?

Correct the fuel pump voltage supply is controlled by the series connected combo relay - MS controlled relay and if an ignition pulse is not present the voltage to the pump is cut.