i am in the process of removing the old 89 maf ecm harness, but to my big suprise the ecm harness is tied into the main harness! is this common or did someone stuff it in there because now i have one hell of a wiring mess under the hood. thanks for any help!

 

i didn't use anything under the hood. except whats needed like speedo, spark module wires, and other stuff. Computer wires not need i diconnect stock computer.

 

The old wire harness will come out just fine just take your time and find all of your connection and unplug them. It seems kind of hard at first but its simple just keep unplugging until its out. I though the same think but I still had it out in 30mins.