high voltage coil affecting tachometer
Thread Starter
Instructor
Joined: Jun 2003
Posts: 101
Likes: 16
From: Calverton N.Y.
high voltage coil affecting tachometer
I installed one of those high voltage coils (davis performance) and now my tachometer is way off. Is there anything that can be done? New to this so any help is appreciated.
Drifting
Joined: Aug 2000
Posts: 1,521
Likes: 0
From: West Islip New York
Re: high voltage coil affecting tachometer (blk406)
What are your symptoms? I installed an Accel high voltage coil and my tach started going crazy over 3000rpm. I thought I might have a bad tach filter so I build another one but that did not help. I tried another Accel coil but it did the same thing.
I ended up ordering a new stock coil. I've heard these are as good as any and have not had any problems since.
Just remembered on some non-digital dash years when installing an MSD you need to remove the tach filter. Not sure of the details but someone will come along soon who will.
I ended up ordering a new stock coil. I've heard these are as good as any and have not had any problems since.
Just remembered on some non-digital dash years when installing an MSD you need to remove the tach filter. Not sure of the details but someone will come along soon who will.
Safety Car
Joined: Feb 1999
Posts: 3,504
Likes: 4
From: Mexico Beach FL
Re: high voltage coil affecting tachometer (blk406)
According to the FAQs at this site: http://www.mrgasket.com/accelmain.html
You need to put a jumper across the tach filter for some Accel products.
Tom Piper
You need to put a jumper across the tach filter for some Accel products.
Tom Piper
Burning Brakes
Joined: Oct 2002
Posts: 835
Likes: 3
From: Water Winter Wonderland
Re: high voltage coil affecting tachometer (Tom Piper)
According to the FAQs at this site: http://www.mrgasket.com/accelmain.html
You need to put a jumper across the tach filter for some Accel products.
Tom Piper
You need to put a jumper across the tach filter for some Accel products.
Tom Piper
Here's some notes: Do the job in full sunlight, as visibility is bad back there. On an L98, at least remove the dist. cap, or better yet, the whole dist. I left the dist. in, and removed the vacuum lines, windshield wiper plug, oil pressure sending unit plug for access. My tach filter had a mail and female connector, so no cutting/splicing was needed to remove it from the tach circuit.
