I know this wouldnt be the best way to test if my tach is way off, but I really want to figure out if I have a high idle of 1100 RPM'*, or if the tach is just off. Would it be possible to get a volt reading in the wire to the Tach and compare it to someone elses at closed loop idle? I dont have the money right now to get an RPM multimeter, or buy a tach at a junkyard. Thoughts, opinions, offers to help?

i do to. if the stupid thing read it I would. Actron left that function out of the 93 H-Bodies for my model. It just bugs me. The PCM has an idle called for 600-700 depending on AC clutch, temp, load, ect...but The tach still doesnt read it.

well, i dont need to drive the next two days so I started trying to get the harness at the gauge cluster off, and I failed horribly. I Have the cluster loose, except for the wiring harness. Is there screws on the inside holding the black connecter on? I dont want to rip the wires or break anything.

nope.. just clips.. put your tilt all the way down, and either get skinnier arms or have your lil sis do it

You do have the steering column dropped, right? Otherwise you will play hell getting the cluster out.

oh ya, you do have to drop that dont ya.. only need to drop the front mount, and you dont need to take it off, just loosen the bolts halfway

now i got it, thanks guys.

I confirmed it with math. Calculate your engine RPM from your speed, making sure to take your slip into account if you're in OD. I had the I/P apart for some reason and had to confirm everything as I put it back together.