Ok ive tried two tachs so far still i cant get one to show the RPMS im at they all level down at 0 and stay there.
I thought maybe the wire was bad so i checked it and it transfers power just fine. so its not the wire. so it hought then the wire out of the box. so i bypassed going to the box with them both, and went to the negative on the coil.(like i was told to do) and still NOTHING.
if any one has had this ever or knows whats going on or whats wrong. please let me konw. btw we have our power and ground hooked up correctly. along with ignition on.
we are clueless on this.
any insight is greatly apreciated.
we are goign to try another tach that we konw for sure works perfectly fine but doubt highly that its going to work. we have no idea what is goign on.
Thanks
John.

 

umm........

what are you trying to do?
hook up an aftermarket tach?
on what vehicle?

 

yes ive treid two tachs. one is brand new one was one laying around.
the vehicle.
my 1993 firebird
sbc 350 carbed
th350 trans
MSD 6ALN
MSD ProBillet Slip Collar Distributor
MSD Blaster Coil 2

and we cant figure out why its nto workign.
heres a short vid without sound of the vehicle int he air and back on the ground.
http://mifbody.com/modules/4nAlbum/a...bum2/wasjo.wmv
car was a v6 car theni obviously removed it. and its been replaced.

 

totally stumped

 

you do have the other 3 wires hooked up correctly, right?
are you sure you are on the negative side of the coil?

 

as chris says we have the ground and power connected right along witht he ignition wire. and we had it to the black wire which is hte negative wire on the coil. the orange is the positive.

 

are you trying to hook it up at the coil with a MSD hooked up?

if so, don't, hook it up to the white wire from the car harness(the original coil connectors) the goes into the MSD

 

um theres no PCM for one.
Two it wasnt working from the MSD tach wire so we tried hte coil still had nothing.

 

yeah, there is no stock harness if thats what your thinkin dave. I have the red to switched power, the black to ground, and the green wire to the tack signal wire out of the 6aln. which in this box is brown. my 6al's have a tac output pin, but this one has a weatherproof 6 way conn. comeing out of it and no tac output like the 6al has. I ohm tested the tac wire from the box, its good. then I bypassed my new harness and went straight from the box, to a new wire ran outside the car and into the window to hook up directly to the tac. still nothing. Im just starting to think the tac. output wire isnt working comeing out of the 6aln box.
john, call msd and see if we should be able to run that wire to the negative wire on teh coil. we know it didnt work, but see if it SHOULD have worked.

 

alrighty ill do that tomorow. ive also gotta call ur local autozone about that alternator.

 

http://www.msdignition.com/pdf/6%20series/6series.pdf
well according to that i should still have the tach output in that spot. i cant remember if its there or not. thats something for you to check tomoro for me again. like in the afteroon when u get home. btw u got internet up now at ur house again?