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Old 01-31-2004, 01:07 AM   #1
94GF8
Scooby Newbie
 
Member#: 43132
Join Date: Sep 2003
Location: Iwakuni, Japan
Vehicle:
1994 WRX Wagon
Grocery Getter my arse...

Default What's wrong with my Tach?

I've got a 1994 WRX Wagon,
At first it seemed like the Tach couldn't keep up with the engine when I really got on the throttle. Now it seems like when I shift the tach only drops half as much as it should so that when I stop it is saying 1800rpm. I can tell by the sound that my WRX isn't idleing at 1800. What's going on here?
Until I get this fixed I don't wanna push my car too hard, and we all know how much WRXs like to be pushed...
-Eric
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Old 01-31-2004, 03:41 AM   #2
SlaminSuby25RS
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Member#: 20425
Join Date: Jun 2002
Location: sacramento
Vehicle:
99 2.5RS swapped
05 Legacy GT

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have you ever taken apart the dash, it could be dirty/ sticky. Just a thought.
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Old 01-31-2004, 08:43 AM   #3
Mulder
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Join Date: Oct 2001
Chapter/Region: Tri-State
Location: NYC
Vehicle:
02 WRX
15 WRX/05 GTO

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You might want to try posting on one of the boards in Europe where they are familiar with your car. This is a North American board and we never had a 94 WRX here so although we may be able to offer general advice, we don't have specific info or experience on your car.
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Old 01-31-2004, 04:44 PM   #4
94GF8
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Member#: 43132
Join Date: Sep 2003
Location: Iwakuni, Japan
Vehicle:
1994 WRX Wagon
Grocery Getter my arse...

Default General Advice

From what I've seen, mechanically and electronically the majority of the WRX stayed the same. True there are small differences for instance, the bypass valve comes off of the TMIC now. What I was hoping is that someone else had experienced this.

No I've never taken apart the dash. Maybe I should

It happened again last night, I was pulling hard in 3rd gear, and the tach stopped at about 3800, then right before I shifted it jumped up to 6500.

Does anyone know of any European WRX boards?

Thanks,
-Eric
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Old 01-31-2004, 05:19 PM   #5
Mulder
Trust no one
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Member#: 11170
Join Date: Oct 2001
Chapter/Region: Tri-State
Location: NYC
Vehicle:
02 WRX
15 WRX/05 GTO

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You might try Scoobynet, it's UK-based.
http://www.scoobynet.co.uk/
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Old 01-31-2004, 07:41 PM   #6
avk
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Member#: 17252
Join Date: Apr 2002
Chapter/Region: Tri-State
Location: NJ
Vehicle:
'06 WX8
59E

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The tach must be of the same design as 1993-96 US-Canada tach. First things to check, in my opinion, would be the cluster harness connections, and the screws holding the tach to the cluster housing. Those screws are what connects the tach to the cluster circuit board, so they must be tight.
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Old 02-03-2004, 05:29 AM   #7
94GF8
Scooby Newbie
 
Member#: 43132
Join Date: Sep 2003
Location: Iwakuni, Japan
Vehicle:
1994 WRX Wagon
Grocery Getter my arse...

Default

Well, Scoobynet hasn't produced even a response, let alone an answer so I'm gonna try checking the connections inside the dash. I would also like to try checking the source of the signal. Does anyone know where the signal comes from? A friend here told me that he thought it came off of the tranny. I was thinking it was more likely that it cam from the Ignition somwhere or else the cam or crank angle sensors.
Any Clues?
Thanks,
-Eric
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Old 02-03-2004, 10:06 PM   #8
avk
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Member#: 17252
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Chapter/Region: Tri-State
Location: NJ
Vehicle:
'06 WX8
59E

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The signal is sent by the ECU. But that doesn't really matter as long as you're testing it at the cluster (you'd need either an oscilloscope or a known good tach). Actually, the conductors on the board on the back are marked.
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Old 02-13-2004, 04:39 AM   #9
94GF8
Scooby Newbie
 
Member#: 43132
Join Date: Sep 2003
Location: Iwakuni, Japan
Vehicle:
1994 WRX Wagon
Grocery Getter my arse...

Default

ScoobyNet said that my problem is the Battery, and that the fix is to replace the Battery.
This doesn't make sense to me. Can someone please explain it?
-Eric
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Old 02-15-2004, 05:16 AM   #10
94GF8
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Member#: 43132
Join Date: Sep 2003
Location: Iwakuni, Japan
Vehicle:
1994 WRX Wagon
Grocery Getter my arse...

Default

In the words of the immortal Flanders "Bump-Diddley-Ump"
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