MSefi.com read only forum (Jan.15,2018)

On the way to work this morning I think the ecm corrupted the code. When i try to start it no fuel pump no injectors no lights or anything. v3.0 board ms2 on 2.905 350 with a tpi on it. New relays and have power at ecm. Have a new harness built as well. Was planning cam and head swap this weekend looks like itll happen a little quicker. Intake gaskets arnt cheap and if i pull em once im not pulling them a second time.

c_10,

Can you communicate at all with the controller? If you can, then try reloading code. If you can't communicate, you might:

- check D19. This can be damaged by excessive voltage spikes, and then it will short the power supply to ground. You can pull-up one leg of it and see if that helps. If it does, replace it with a 6.2 V Zener diode, such as DigiKey 1N4735ADICT-ND.

- check to make sure there is no residual solder flux left on the board. If the board is not very, very clean, wash it with 99% isopropyl alcohol until it is, then let it dry completely.

- check C22. Make sure it is in the correct way - otherwise it will eventually fail: http://www.megamanual.com/ms2/V3assemble.htm#power

There are more tips here: http://www.megamanual.com/ms2/V3trouble.htm

Lance.

Board is cleaned and has been running for the past year. I had some module issues that i thought i had solved. I replaced c22 last spring when I had an injector spike the board. I didnt have my laptop or i would have checked comms. I wont be getting back to the vehicle until Later this evening.

I reloaded code and it seems to help as its running again. I cant seem to keep comms up. Gonna try a new ignition module tonight and see if it cleans up some more.