quote Originally posted by theogre: 6869 ECM doesn't have knock input

Not from factory. The Knock Sensor input flag is turned off.

It can be made to work by modifying the BIN to turn it ON and adding the appropriate hardware.
http://www.fiero.nl/forum/A...050119-2-054278.html
http://www.fiero.nl/forum/A...031110-2-036541.html

I had a 6869 with Knock sensor running on my 87 GT before changing the car to a 1227165 ECM.
Check your email Jeff.

------------------
My World of Wheels Winners (Click on links below)

3.4L Supercharged 87 GT and Super Duty 4 Indy #163

[This message has been edited by fierosound (edited 02-02-2020).]