Tach install Quick question please!!

Troyzstang · November 16th, 2006, 08:08 PM

Ok guys I need a little help.

I just installed a sunpro tach ( cp2012) I took the signal off my ecu. Same place as my raptor shift light & my msd window switch. But the tach won't rise above 800rpms Do I have to have a tach adaptor? And if so Why?

Please reply

Troy

White99stang · November 16th, 2006, 08:30 PM

do you have a digital window switch

White99stang · November 16th, 2006, 08:32 PM

oh now that i think about it you will need a tach adapter, the signal the tach needs is a 12v square wave pulse and the signal coming from that wire is a sine wave. The raptor shift light works there cause it is programed to read the sine wave and same with the window switch.

White99stang · November 16th, 2006, 08:40 PM

so in instance you are only reading off one coil right now. thats why if you multiply the max rpms the tach will go by 8 then it would read normal lol

Troyzstang · November 16th, 2006, 08:42 PM

Originally Posted by White99stang

do you have a digital window switch

Yes I do.

White99stang · November 16th, 2006, 08:47 PM

your still gonna need a tach adapter cause the window switch is programed to read off one coil also. you can find them for around 40 bucks used

Troyzstang · November 16th, 2006, 08:53 PM

Originally Posted by White99stang

your still gonna need a tach adapter cause the window switch is programed to read off one coil also. you can find them for around 40 bucks used

Thanks Tim.

I'll start looking. Do you have an extra one in your pocket

White99stang · November 16th, 2006, 09:09 PM

nope just the one already on the car

Troyzstang · November 17th, 2006, 05:40 AM

Oh cool that one will work

I'll stop down later and pull it out of your car.

Thanks
Troy

November 16th, 2006, 08:08 PM	#1
Troyzstang Newbie Join Date: Aug 2006 Posts: 21	Tach install Quick question please!! Ok guys I need a little help. I just installed a sunpro tach ( cp2012) I took the signal off my ecu. Same place as my raptor shift light & my msd window switch. But the tach won't rise above 800rpms Do I have to have a tach adaptor? And if so Why? Please reply Troy

November 16th, 2006, 08:30 PM	#2
White99stang #1 Asshole Mod Join Date: Aug 2005 Location: elkridge, MD Posts: 2,633	do you have a digital window switch __________________ 99 Mustang GT VT 302 Stroker (race car) 11.13@123 for sale 9k 06 Dodge MegaCab. Cummins diesel power. Diablosport Powerpuck, Silencer ring removed, intake baffling mia, Isspro pyro, boost, and tranny gauges, 6inch chrome tip

November 16th, 2006, 08:32 PM	#3
White99stang #1 Asshole Mod Join Date: Aug 2005 Location: elkridge, MD Posts: 2,633	oh now that i think about it you will need a tach adapter, the signal the tach needs is a 12v square wave pulse and the signal coming from that wire is a sine wave. The raptor shift light works there cause it is programed to read the sine wave and same with the window switch. __________________ 99 Mustang GT VT 302 Stroker (race car) 11.13@123 for sale 9k 06 Dodge MegaCab. Cummins diesel power. Diablosport Powerpuck, Silencer ring removed, intake baffling mia, Isspro pyro, boost, and tranny gauges, 6inch chrome tip

November 16th, 2006, 08:40 PM	#4
White99stang #1 Asshole Mod Join Date: Aug 2005 Location: elkridge, MD Posts: 2,633	so in instance you are only reading off one coil right now. thats why if you multiply the max rpms the tach will go by 8 then it would read normal lol __________________ 99 Mustang GT VT 302 Stroker (race car) 11.13@123 for sale 9k 06 Dodge MegaCab. Cummins diesel power. Diablosport Powerpuck, Silencer ring removed, intake baffling mia, Isspro pyro, boost, and tranny gauges, 6inch chrome tip

November 16th, 2006, 08:47 PM	#6
White99stang #1 Asshole Mod Join Date: Aug 2005 Location: elkridge, MD Posts: 2,633	your still gonna need a tach adapter cause the window switch is programed to read off one coil also. you can find them for around 40 bucks used __________________ 99 Mustang GT VT 302 Stroker (race car) 11.13@123 for sale 9k 06 Dodge MegaCab. Cummins diesel power. Diablosport Powerpuck, Silencer ring removed, intake baffling mia, Isspro pyro, boost, and tranny gauges, 6inch chrome tip

November 16th, 2006, 09:09 PM	#8
White99stang #1 Asshole Mod Join Date: Aug 2005 Location: elkridge, MD Posts: 2,633	nope just the one already on the car __________________ 99 Mustang GT VT 302 Stroker (race car) 11.13@123 for sale 9k 06 Dodge MegaCab. Cummins diesel power. Diablosport Powerpuck, Silencer ring removed, intake baffling mia, Isspro pyro, boost, and tranny gauges, 6inch chrome tip

November 17th, 2006, 05:40 AM	#9
Troyzstang Newbie Join Date: Aug 2006 Posts: 21	Oh cool that one will work I'll stop down later and pull it out of your car. Thanks Troy

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