´99 LS1 Tach
Thread Starter
Teching In
Joined: Nov 2008
Posts: 3
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From: ICELAND
´99 LS1 Tach Hi, I´m new here and like to ask one question.
I have 99 camaro engine in my restored jeep here in Iceland, and I´m little confused about my tachometer. I tried to hook up autometer tach adapter and did not receive signal from it. Anyone who knows a solution? I´m using cheap universial tachometer
Thanks, Asgeir
I have 99 camaro engine in my restored jeep here in Iceland, and I´m little confused about my tachometer. I tried to hook up autometer tach adapter and did not receive signal from it. Anyone who knows a solution? I´m using cheap universial tachometer
Thanks, Asgeir
Joined: Nov 2001
Posts: 1,707
Likes: 33
From: Anderson, Indiana
You should be able to go straight from the LS1 PCM to the universal tachometer without the adapter. Set the universal tach to "4 cyl." and you should be good to go.
You might give that a try and see what happens.
You might give that a try and see what happens.
__________________
91 Z28 LS2 408CI, LS9 Supercharger, LPE GT7 cam, Yank3000, 3450 raceweight.
Latest numbers: 9.71 ET, 141.42 MPH, 1.40 60' , 610 RWHP Mustang Dyno
www.speartech.com
91 Z28 LS2 408CI, LS9 Supercharger, LPE GT7 cam, Yank3000, 3450 raceweight.
Latest numbers: 9.71 ET, 141.42 MPH, 1.40 60' , 610 RWHP Mustang Dyno
www.speartech.com
Thread Starter
Teching In
Joined: Nov 2008
Posts: 3
Likes: 0
From: ICELAND
tach I tried this at first, then tried another tach and that didn´t work either. Connected it to white wire, but can´t remember what number. I have to use some kind of scope to see the signal, right?
Somewhere I´ve seen something about 5V squarewave signal
Little confused, Asgeir
Somewhere I´ve seen something about 5V squarewave signal
Little confused, Asgeir
Joined: Nov 2001
Posts: 1,707
Likes: 33
From: Anderson, Indiana
Make sure the wire is coming from PCM RED-10. Usually the F-body PCM's work well with aftermarket tachs, other than setting it to 4 cylinder to get the readout correct. Old tachs that are looking for the high voltage spike from the ignition coil negative have problems with the low amplitude square wave from the PCM, but that's about it.
Yes, either double check your wire location or put a scope on it to make sure you have a good signal.
Yes, either double check your wire location or put a scope on it to make sure you have a good signal.
__________________
91 Z28 LS2 408CI, LS9 Supercharger, LPE GT7 cam, Yank3000, 3450 raceweight.
Latest numbers: 9.71 ET, 141.42 MPH, 1.40 60' , 610 RWHP Mustang Dyno
www.speartech.com
91 Z28 LS2 408CI, LS9 Supercharger, LPE GT7 cam, Yank3000, 3450 raceweight.
Latest numbers: 9.71 ET, 141.42 MPH, 1.40 60' , 610 RWHP Mustang Dyno
www.speartech.com
