96hatchBoy

hey guys please help me i need to know why my tach is off by 400 rpm. about a month ago out of the blue it just started to read about 400 rpm late i noticed this because my vtec engagement was off by 400. my oil pressure is good and i tested the vtec solenoid by putting directly power to it and it clicked.

so i fured that the tach was bad so i just replaced the tach with another oem tach and it is still off by 400 RPMS! this is really annoying. the ecu was stock when this happen so i tried a chipped ecu and again still the same thing. what else could be causeing this. i know people say that the stock tach is always off but for a year it was accurate so i want to know why all the sudden it read inaccurate???

96hatchBoy

anyone know what could be causing this?

B_Swapped93

Could be something in the cluster it's self(the green circuit board). possibly look threw here https://honda-tech.com/forums/acura-integra-6/rpm-acts-up-help-please-3149313/. Maybe FCM will chime in he knows a good deal about electronics.

96hatchBoy

no one has had this problem before??

toto98coupe

Did u change ur wheels to a larger size ?

fcm

Wheels will not make a diff.

I would start by checking connections in the distributor, to ICM and coil, the tach is "driven" by the ICM, either the connection, [blue lead] is poor or the ICM is bad. 94

$MIKE$

iTrader: (13)

I would vote some thing with dizz. or elctrical problem with the cluster. may that green flim on the other side of the cluster is F'd up

96hatchBoy

well the distributor is about a year old i bought a brand new one from acura dealer. the coil is also new. i just swapped the ICM with a different one and ther is still the same off by 400/500.

and likes i said i already swap just the tach part of the cluster. should i just swap the whole cluster with another to see if that works? i hate to buy another one just to find the same problem afterward

B_Swapped93

can you borrow one ? but that seems like the last thing to try