What would cause the tach to read incorrectly?

[632 Regal]

guess I'll throw in my 2¢

I would think it has something to do with the capacitors in the cluster, maybe you can compare them against each other and isolate the non-conformist and solder that to the new board. It's just a guess but I give you something to think about, hope you get this figured out.

Jeff

[ryan roopnarine]

a voltage regulator for the instrument console....if you have already tackled the capacitors and stuff.....fords sometimes develop a lagging tachometer with a failed instrument regulator.....(called autozone for alternator regulator, told me only thing they had was for instruments, go figure)....i don't know if the fact that you have an m20 i guess??? and its from a 93 in which only a m50 would be, would play a part.

[mancini_mark]

Thanks guys. I got a pretty good deal on this cluster. But I guess sometimes when you cut corners it ends up costing more. So, I should probaby buy a 1990 cluster and sell this one.

Mark

[ryan roopnarine]

which car/engine do you have? might not make a difference, it might just be something like the voltage regulator thing i mentioned.

[mancini_mark]

Hi Ryan,

I have a 1990 525i with the M20 and a 5-speed. Does the car have a voltage regulator that needs replacing or is it something I have to add. If I have to add it, where does it go?

Thanks,

Mark