Im building a 383 strocker for my 87 GTA...and Im geting rid of a lot of stuff..no ac ect..a hot street/strip car....I wanna know will my speo still work along with all my other gauges if I take out the ECM..i have read and read on the change over and heard nothing aobut the gauges working or not working..

thanks
Joe

 

Cable drive speedos aren't affected by removing the ECM.

Electronic drive speedos operate off of a vehicle speed module, input to but separate from the ECM. As long as you leave the harnessing in place that feeds the VSS module, the speedo will operate.

 

I don't mean to hijack this thread but, I am having trouble with my spedo after replacing the engine and getting rid of the ecm. I'm pretty sure all the wiring is correct. I did a test the other day. I hooked up a drill to the sensor at the trans and spun it and the speed did come off zero. But, at the time I had the buffer box unplugged. I plugged the buffer box back in and it still worked. However, with the car on jack stands and running in gear up to about 3000 RPM the gauge did not work. I checked to make sure the gear is in correctly. Everything looks to be installed correctly. Car was an L03 previously.