1999 Mercury 200 efi

by Alex
(Nebraska)

Sparatically losing power to my high side fuel pump. Mechanic spread apart pins in wiring harness to ecu. It ran for half a day and shut back down. Was able to unplug ecu and plug it back together and then ran great to get back to dock. It did this a few times and was able to get it going with same process. Do I have to replace ecu as the pin side of plug is connected to it?
Is it loose connections or is my ecu going bad.
Cant find a new ecu as they have been discontinued.
If I buy a used one what’s the odds of having the same problem?

Click here to post comments

Join in and write your own page! It's easy to do. How? Simply click here to return to Mercury Forum.