donvito#1

so i just bought a stock cluster with a tach pluged it in and tach didnt work so i found the plug behind the cluser with the blue tach wire so i jumped that wire to the blue wire right by the disturbter it worked but wasent accurate at all kinda went were it wanted when hit the gas does any one know how 2 get this 2 work

donvito#1

anyone is their a different apporach something different i can do help me out

donvito#1

http://s160.photobucket.com/al...=link

BlueIntegraBoy

iTrader: (5)

The tach should have worked without jumping the wire. Perhaps you don't have all of the plugs plugged into the harness.

donvito#1

idk i follwed the wire threw the firewall and found the plug but were the gsr harness wwas pluged in it was missing the wire so the stock harness had the blue wire right by the plug but the gsr harness plugged in the other side on the plug had no wire coming out of that even though when i jumped it it should of worked right

BlueIntegraBoy

iTrader: (5)

Yeah, it should though

donvito#1

it got some kinda signal but not accurate at a idle it wont even move but when i rev it up it bounces around tried 2 differnt cluster and they both did the same thing

BlueIntegraBoy

iTrader: (5)

So you are saying there isn't a blue wire on the engine harness itself?

donvito#1

on the stock harness coming out the firwall it does have a blue wire but were it plugs into the gsr harness their no blue wire their was no wire their at all just got a little cap on it

BlueIntegraBoy

iTrader: (5)

Instead of tapping into that blue wire for the cluster harness, connect that wire to the harness going through the firewall.

donvito#1

hmmm ill have 2 try that but i dont understand y it didnt work just jumping it stright to the blue wire on the disturbter ill try that 2 marrow and let u know thanks

BlueIntegraBoy

iTrader: (5)

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by donvito#1 &raquo;</TD></TR><TR><TD CLASS="quote">hmmm ill have 2 try that but i dont understand y it didnt work just jumping it stright to the blue wire on the disturbter ill try that 2 marrow and let u know thanks </TD></TR></TABLE>'

Cuz if you go from the distributor to the cluster, you bypass the ECU.

donvito#1

ahhhhhh never thought of that

donvito#1

didnt work dam i ran out of ideas is their a tach wire that plugs into the ecu?when i wired it like u said it did the same thing as i jumped 2 cluster 2 disturbetr


Modified by donvito#1 at 6:11 PM 2/26/2008

donvito#1

any one no how 2 check the tach signal

91DA9

If you had an oscilloscope, you could check the signal right off the distributor, and see if maybe the ECU is messed up. Although on the G2, the tach reads directly from the distributor, I thought all OBD1 Integras were like that?

One thing to do if you have an extra one laying around is to switch ignitors (ICM) as that is where the tach signal originates.

donvito#1

were is the ignitor got a diagram didnt know if i posted it but i got an obd2 gsr engine in my hacth

donvito#1

would it matter at all if i have msd cap blaster wires?would that make it off

nam3less

dont thinik the cap and wires would have anything to do w/ it... really sounds like a wire issue.

jordan71

yeah check all ur wireing

donvito#1

how could it b a wire issue if i jumped the wire from the distrubuter to the cluster i bypassed all other wires it somethin more then that

91DA9

It looks like this:

and it is in the distributor.

The erratic behavior makes me think it is the ingiter, but it could also be the ECU, as I guess OBD2 engines send the tach signal to it?

donvito#1

my body donny from all about speed said if i wire the tack wire stright 2 the ignator blue wire i should get a good tach reading if not the ignator is bad what signs will u have 4 a bad ignator

oranginal

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by 91DA9 &raquo;</TD></TR><TR><TD CLASS="quote">One thing to do if you have an extra one laying around is to switch ignitors (ICM) as that is where the tach signal originates.</TD></TR></TABLE>

I am having a similar issue...At first all was fine, then the tach needle would bounce randomly, car sounded fine though so i thought it was an ignitor going bad.
Then recently I REVed the car to redline and the tach went to 0 and hasn't come up since. Car still starts and runs fine.

My question is if you have a bad ignitor will the car still run fine? I'm wondering if the ignitor just controls the tach signal. Although my ecu seems to be getting a tach signal but i could be wrong, i'm just basing this on the car running fine (you know what happens when you assume)

don't mean to thread jack, just looking for more info on what the ignitor actually does.

91DA9

It does send the tach signal, but it also tells the coil to fire. As far as I know, the two parts are separate and either one could go bad.