Help with Camaro tach! - The 1947 - Present Chevrolet & GMC Truck Message Board Network

Alex Stilwell · 10-20-2011, 12:51 AM

Can anyone help me with wiring a Camaro tach into a 84 Custom Deluxe. I have tried 2 or 3, none have registed correctly. I even took one out of a running Camaro that works in the Camaro but won't read correctly in the truck. Any info would greatly be helpful, Thanks
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Jonboy · 10-20-2011, 09:20 AM

Is your truck a 6 cylinder and the tach an 8 cylinder version (or vice versa)? that will cause the reading to be off. If it simply isn't working, it has to be in your wiring. There are only 3 wires, and they should be seperate. Tach signal goes to the terminal on the HEI (or negative on the coil), 12+ goes to switched power, and a ground.

spudz · 10-20-2011, 11:19 AM

I mess with alot of third gen camaros, almost everyone I ever had the tach was way off... The 86 z28 I just got the tach read double the actual RPM. But since yours was working fine in the camaro it came out of I dunno. Just something to look for.

INSIDIOUS '86 · 10-20-2011, 11:21 PM

im going to be supplying tach conversions for these trucks with repaired gauges that have the board modified to read accurate, but most likely you have the 90-92 tach that blows some resistors and has to have them calibrated and repaired, gauges should be available in febuary-march

10-20-2011, 12:51 AM	#1
Alex Stilwell Registered User Join Date: Oct 2011 Location: Lenoir NC Posts: 14	Help with Camaro tach! Can anyone help me with wiring a Camaro tach into a 84 Custom Deluxe. I have tried 2 or 3, none have registed correctly. I even took one out of a running Camaro that works in the Camaro but won't read correctly in the truck. Any info would greatly be helpful, Thanks Posted via Mobile Device

10-20-2011, 09:20 AM	#2
Jonboy Slots go on anything! Join Date: May 2003 Location: Richardson, TX Posts: 5,957	Re: Help with Camaro tach! Is your truck a 6 cylinder and the tach an 8 cylinder version (or vice versa)? that will cause the reading to be off. If it simply isn't working, it has to be in your wiring. There are only 3 wires, and they should be seperate. Tach signal goes to the terminal on the HEI (or negative on the coil), 12+ goes to switched power, and a ground. __________________ 1974 Jimmy- 5.3/4L80e/NP241

10-20-2011, 11:19 AM	#3
spudz Registered User Join Date: Oct 2005 Location: Branchville SC Posts: 1,647	Re: Help with Camaro tach! I mess with alot of third gen camaros, almost everyone I ever had the tach was way off... The 86 z28 I just got the tach read double the actual RPM. But since yours was working fine in the camaro it came out of I dunno. Just something to look for. __________________ 2004 z71, 96 z71 on 38s, 88 Chevy k5 blazer, 4in lift. 84 swb project, 82 SWB project , 84 chevy 4x4 lwb project, 88 Jimmy beater/highschool ride. 79 c30. 99 tahoe 4x4 project. and a bunch of parts trucks..

10-20-2011, 11:21 PM	#4
INSIDIOUS '86 Registered User Join Date: Jul 2009 Location: washington Posts: 4,178	Re: Help with Camaro tach! im going to be supplying tach conversions for these trucks with repaired gauges that have the board modified to read accurate, but most likely you have the 90-92 tach that blows some resistors and has to have them calibrated and repaired, gauges should be available in febuary-march __________________ 377 sbc thumpr cam autogear m23 muncie 3:73 Detroit trutrac 3''spintech prostreet mufflers xpipe 1 3/4 headers build thread !http://67-72chevytrucks.com/vboard/s...d.php?t=577217 Iroc gauge threadhttp://67-72chevytrucks.com/vboard/s...d.php?t=554511



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