I have an 87 IROC, 305 tpi, 5 speed manual. I took the original gauge cluster out and replaced it with all new Autometer gauges. The old speedo was mechanical, the new one is electronic. Now, when I drive the car, I get a code 24, vehicle speed sensor. I have also noticed the idle dropping down when coasting to a stop. I know the vss on this car is only for supplying the ECM with information about the vehicle's speed. Question: Is there any way to wire the new electronic speedo input into the harness so the ECM is getting the info. If not, how can I get rid of the code? I like for the check engine light to work but I don't like seeing it on all the time.

 

Don't everybody reply at the same time.

 

i apologize, but i do not have a solution for your problem, but i do have a question about the particular sensor.
my car has a carbeuretor, and cruise control, automatic trans, and a mechanical speedo. i have the same code (24) and have had it for quite some time.
what is it going to effect if it's not replaced?