Tach not working
Tach not working Hi,
I installed a new LS2 into a 99 camaro. after that I found that the tach wasn't working. After cnnecting the computer to the OBDII port and seeing that it was reading the tach just fine, I started looking at the wireing. didn't fnd any problem. what should I like at next? all the other factor gages work fine. didn't fnd any fuses blown.
Any help would be greatly appreciated
Al
I installed a new LS2 into a 99 camaro. after that I found that the tach wasn't working. After cnnecting the computer to the OBDII port and seeing that it was reading the tach just fine, I started looking at the wireing. didn't fnd any problem. what should I like at next? all the other factor gages work fine. didn't fnd any fuses blown.
Any help would be greatly appreciated
Al
TECH Senior Member
Joined: Nov 2001
Posts: 7,036
Likes: 1
From: Lake Zurich, IL
are all the other gauges working? I thought the tach speed wsa part of the "serial stream" to the gauge cluster
though now that I think of it... there is a wire that is just tach... (#10 wire jumps to head... not sure which connector) ... you have to intercept it for a MSD window switch for example ...
I'm thinking it's probably a wiring issue... a couple years ago I had an intermitent tach problem... ended up being that the spot where I spliced years ago for an MSD window switch (long since removed) wasn't making a good connection ... I could log RPM via the DLC since that's only talking to the PCM... but the feed from the PCM to the tach was the problem
though now that I think of it... there is a wire that is just tach... (#10 wire jumps to head... not sure which connector) ... you have to intercept it for a MSD window switch for example ...
I'm thinking it's probably a wiring issue... a couple years ago I had an intermitent tach problem... ended up being that the spot where I spliced years ago for an MSD window switch (long since removed) wasn't making a good connection ... I could log RPM via the DLC since that's only talking to the PCM... but the feed from the PCM to the tach was the problem
TECH Senior Member
Joined: Nov 2001
Posts: 7,036
Likes: 1
From: Lake Zurich, IL
ok... checked my tuningdocs directory (can't post a link since it's not something I designed and I don't have permission of author to post)
Pin 10 on the red connector, it's white... provides a tach signal ...
Pin 10 on the red connector, it's white... provides a tach signal ...
Originally Posted by horist
are all the other gauges working? I thought the tach speed wsa part of the "serial stream" to the gauge cluster
though now that I think of it... there is a wire that is just tach... (#10 wire jumps to head... not sure which connector) ... you have to intercept it for a MSD window switch for example ...
I'm thinking it's probably a wiring issue... a couple years ago I had an intermitent tach problem... ended up being that the spot where I spliced years ago for an MSD window switch (long since removed) wasn't making a good connection ... I could log RPM via the DLC since that's only talking to the PCM... but the feed from the PCM to the tach was the problem
though now that I think of it... there is a wire that is just tach... (#10 wire jumps to head... not sure which connector) ... you have to intercept it for a MSD window switch for example ...
I'm thinking it's probably a wiring issue... a couple years ago I had an intermitent tach problem... ended up being that the spot where I spliced years ago for an MSD window switch (long since removed) wasn't making a good connection ... I could log RPM via the DLC since that's only talking to the PCM... but the feed from the PCM to the tach was the problem
Yes All the other gages work. This car has ever had another tach installed. I can read the tach throught the ODBII using EFILive. does this have anything to do with the cam sensor? I have an issue with the cam sensor throwing errors and not reading properly.
Thanks
Al
Originally Posted by horist
ok... checked my tuningdocs directory (can't post a link since it's not something I designed and I don't have permission of author to post)
Pin 10 on the red connector, it's white... provides a tach signal ...
Pin 10 on the red connector, it's white... provides a tach signal ...
what red connector?
and what do you mean it's white?
Al
