Tachometer Filter and ASR
Thread Starter
Burning Brakes
Joined: Nov 2001
Posts: 920
Likes: 0
From: Cherry Hill NJ
Tachometer Filter and ASR
from a complete stop, either in 1st or in Reverse, my ASR would kick in and just gag the car - I'd usually be able to go though. Turning it off was the cheap work around.
last friday I wanted it right, so I finally dropped it off at the dealer (Classic Chevy in Moorestown, NJ). Today the only thing they've found is getting in a part that is no longer made - called a Tachometer Filter. I've not heard of it.
In the absence of schematics, shop manuals and experience, I can only ask does this make sense ? Has anyone else had this ?
last friday I wanted it right, so I finally dropped it off at the dealer (Classic Chevy in Moorestown, NJ). Today the only thing they've found is getting in a part that is no longer made - called a Tachometer Filter. I've not heard of it.
In the absence of schematics, shop manuals and experience, I can only ask does this make sense ? Has anyone else had this ?
Burning Brakes
Joined: Apr 2002
Posts: 934
Likes: 0
From: MO
Re: Tachometer Filter and ASR (jimbomill)
I had to cut the tach filter out on my 94 when I installed MSD. I've ran without MSD and it had no effect. Cut it out. It is in a white wire down by your coil. you may have to pull some wire loom back to find it. I'm pretty sure thats what they are talking about.
Team Owner
Joined: Jul 1999
Posts: 65,492
Likes: 230
From: Orange Park Florida
Re: Tachometer Filter and ASR (jimbomill)
The taqch filter is a wave shaper, or integrator,.electronics wise...some folks call it a filter, in that it takes the very short duration spikes and such off the line before it goes to the rest of the electronics,...been there since the early days, say '77?? of the GM vette tachs...and every generation since, AFAIK....so yes that tach filter could upset the ASR and such....incorrect wave form is presented to the ASR computer, and like the tach, it don't know what to do with it....
I don't KNOW this for a fact, but it seems possible...
GENE
I don't KNOW this for a fact, but it seems possible...
GENE
Burning Brakes
Joined: Apr 2002
Posts: 934
Likes: 0
From: MO
Re: Tachometer Filter and ASR (jimbomill)
Probably not, they would want to sell it to you and charge $75 labor.
Cut it out, I was without msd for about 2 years with it cut out and never had a problem. It makes sense if it effects your asr.
Cut it out, I was without msd for about 2 years with it cut out and never had a problem. It makes sense if it effects your asr.
Melting Slicks
Joined: Apr 2000
Posts: 2,793
Likes: 46
From: Elizabeth City, NC
Re: Tachometer Filter and ASR (James94LT1)
Yeah you can just cut it out. It will be just fine. I know guys that had to remove it for the MSD as well and then later removed the MSD and no ill effects.
Thread Starter
Burning Brakes
Joined: Nov 2001
Posts: 920
Likes: 0
From: Cherry Hill NJ
Re: Tachometer Filter and ASR (James94LT1)
According to the dealer, they do not make it anymore, so the workaround may be the next best thing (for them) and the best thing for me :)
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