question about autometer tach w/2002 pcm (cross posting)
10-01-2007, 05:52 PM
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question about autometer tach w/2002 pcm (cross posting) Hi All,
I'm running an 02 pcm and have an autometer tach in a LS1 swapped car. I have it wired to PCM wire #10. The tach doesn't pick up RPM. I tried setting as 4 CYL and tach seemed to pick up 2X rpm. Can anyone tell me the right way to connect the tach?
cheers
TIm
I'm running an 02 pcm and have an autometer tach in a LS1 swapped car. I have it wired to PCM wire #10. The tach doesn't pick up RPM. I tried setting as 4 CYL and tach seemed to pick up 2X rpm. Can anyone tell me the right way to connect the tach?
cheers
TIm
10-08-2007, 10:20 PM
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I did that on my 98z28, but it uses the 35 wire, from what I remember it is a white wire#10, I just spliced into that wire and ran my autometer tach in 4 cyl mode, it worked for me.
How are you tapping into the wire and are you sure the tach is in 4 cyl mode? I think you have to cut both small wires to run 4 cyl mode if I remember right, if it is picking up 2x the signal, just reconnect the wire back to a 8 cyl mode?
How are you tapping into the wire and are you sure the tach is in 4 cyl mode? I think you have to cut both small wires to run 4 cyl mode if I remember right, if it is picking up 2x the signal, just reconnect the wire back to a 8 cyl mode?
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10-14-2007, 02:26 PM
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I attach to the end of the #10 wire off red PCM plug (02 pcm).
I put it in 4 cyl and it's definitely higher than actual, idle says over 2000 and a small bit of throttle puts it over 5000, and it's not screaming.
with wires attached idle says about 500 and a lot of throttle puts it at 1200 - like it's just not reading it.
I think it's a voltage in issue and 8 cyl mode is correct, something about the sensitivity with the wires connected vs. not.
I'll probably just try to get an answer from autometer.
Thanks!
Tim
I put it in 4 cyl and it's definitely higher than actual, idle says over 2000 and a small bit of throttle puts it over 5000, and it's not screaming.
with wires attached idle says about 500 and a lot of throttle puts it at 1200 - like it's just not reading it.
I think it's a voltage in issue and 8 cyl mode is correct, something about the sensitivity with the wires connected vs. not.
I'll probably just try to get an answer from autometer.
Thanks!
Tim
I did that on my 98z28, but it uses the 35 wire, from what I remember it is a white wire#10, I just spliced into that wire and ran my autometer tach in 4 cyl mode, it worked for me.
How are you tapping into the wire and are you sure the tach is in 4 cyl mode? I think you have to cut both small wires to run 4 cyl mode if I remember right, if it is picking up 2x the signal, just reconnect the wire back to a 8 cyl mode?
How are you tapping into the wire and are you sure the tach is in 4 cyl mode? I think you have to cut both small wires to run 4 cyl mode if I remember right, if it is picking up 2x the signal, just reconnect the wire back to a 8 cyl mode?
