Fox Ecm Swapping

Very straight forward remove and replace.

Remember to pull the jumper out of the clutch switch plug and plug it into the clutch switch. It helps the computer sense when the clutch is pressed for proper idle strategy and to hang rpms while changing gears. Also, it allows the car to start only when the clutch is pressed in. Here's a pic from Google. Both plugs need to be plugged in.



There's also a difference in the transmission harness that goes from the drivers kick panel, under the drivers seat, and through the trans tunnel. There's been some debate over this harness. I replaced mine with one from a 5 speed fox. Connector pin position may have varied through the years. Mine came out of a 1989 and fit a 1988.