Where is my Tach Filter?
Thread Starter
Drifting
Joined: Aug 2004
Posts: 1,763
Likes: 0
From: Fayetteville NC
Where is my Tach Filter?
I'm ready to tackle the tach repair job and want to locate and test the tach filter before I purchase a new tach circuit board. Can someone tell me where it is using the attached picture.
http://img.villagephotos.com/p/2005-...TachFilter.JPG
http://img.villagephotos.com/p/2005-...TachFilter.JPG
Racer
Joined: Jul 2005
Posts: 499
Likes: 1
From: Winnipeg Manitoba
Where's the Tach Filter
Found a picture of a Tach Filter
I think it looks like this
http://www.madvet.com/shop?frame=1.140.5902
I think it looks like this
http://www.madvet.com/shop?frame=1.140.5902
Racer
Joined: Jul 2005
Posts: 499
Likes: 1
From: Winnipeg Manitoba
Plenty of tach filter info on this thread. (and others)
http://forums.corvetteforum.com/showthread.php?t=913235
Quote from that thread: The filter is located at the rear of the intake manifold, bolted to one of the rear bolts, drivers side. (at least on mine) It looks like a typical round metal can filter cap with a wire at each end and a tab welded to the side which is used as the mounting point.
There is some debate as to the purpose of the filter, Some say its for protection, I believe it simply for noise filtering. Some people are running with no filter, no problems. If you replace the filter with a 10K ohm resistor, and the tach still doesn't work, its probably not the filter.
http://forums.corvetteforum.com/showthread.php?t=913235
Quote from that thread: The filter is located at the rear of the intake manifold, bolted to one of the rear bolts, drivers side. (at least on mine) It looks like a typical round metal can filter cap with a wire at each end and a tab welded to the side which is used as the mounting point.
There is some debate as to the purpose of the filter, Some say its for protection, I believe it simply for noise filtering. Some people are running with no filter, no problems. If you replace the filter with a 10K ohm resistor, and the tach still doesn't work, its probably not the filter.
Melting Slicks
Joined: Apr 2004
Posts: 2,083
Likes: 2
From: Montreal Qc.
It's supposed to be where kilroy says, looks to be not there in your pics (black X below, that's where it is on my car). Maybe someone moved it, or got rid of it completely. It's a little silver cylinder the size and shape of an M-80 (if you remember your fireworks from highschool 
)
If you follow the lead from the BLACK clip on the dist (purple arrow below), that's the tach signal lead. That wire goes to the filter, then goes to the tach.
)If you follow the lead from the BLACK clip on the dist (purple arrow below), that's the tach signal lead. That wire goes to the filter, then goes to the tach.
Last edited by Star79; Sep 14, 2005 at 01:32 AM.
