91glassycrx

I had a moster tach in my crx for about a year and it worked just fine. I hooked up a air/feul ratio and a oil pressure guage up today in my hatch. Well when i hook up the moster tach up its reading funny. At idel the moster tach reads like 1K and the stock tach reads like 500 or 600. well when i get on it and i'm about to redline at 7200 the moster tach reads like 6500 could it be that I have a si motor (tach being hooked up to the si dizzy) and a dx tranny and guage cluster. help me out thinks guyz

hondawill

i have the same tach. i also hooked up a air to fuel and a boost gauge. i've got a motor swap and my tach reads the same as the tach in the dash. did u check the orange and brown wires on the back of the tach and make sure there not touching?

LostSolVTEC

mine has been doing that for a bout a year, it sits at 1 on idle but if i tap the tach it moves down and when it goes up it jumps and sticks, i've regrounded it, hooked it up to the tach wire behind the dash, to teh wire coming out of the neg. side of the dist. and it does the same thing...either i'm retarded or it's defective...i think i'm just retarded

pornstarSR

i went threw 3 monster tachs before i got the clue...

1st tach - died, didnt read anything
2nd tach - twitched at idle, and sometimes didnt read anything
3rd tach - lost 100 rpm per 1000 so at 6000 on the tach i would really be at 7000 on the motor...that was FRUSTRATING, i thought something was really wrong with the car.

and yes i checked and rechecked grounds, and wiring. and everything...

all the tach's started there life working fine. then no more than a year later(at the most) they took a crap..

check all your power and ground wires...process of elimination, go threw everything.

these gauges are very sensitive to the amount of volts they get...if you have all your sensor hooked up in like a series...all off on power wire and such

it might not work right...

i got a gauge cluster with a tach, ill never go back...atleast i dont think....

stackz

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by pornstarSR &raquo;</TD></TR><TR><TD CLASS="quote">
these gauges are very sensitive to the amount of volts they get...if you have all your sensor hooked up in like a series...all off on power wire and such

</TD></TR></TABLE>

key point right there.

also, if you accidently hooked the tach to the WRONG coil wire (positive side instead of negative side) you will fry the tach within a year or so. the tach signal wire is meant to read PASSIVE voltage (off the negative coil terminal) not ACTIVE voltage (off the positive coil terminal).

I've had several friends hook their tachs up backwards and have had all KINDS of problems from the tach simply not working all together, to their dash catching on fire after the wire shielding melts and starts burning.