Cluster Help
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Member
Joined: Jul 2009
Posts: 123
Likes: 0
From: Lebanon, Pennsylvania
Car: 1984 Berlinetta,'82 and '86 Camaro
Engine: Rebuilt 350
Transmission: Automatic. =[
Axle/Gears: Stock
Cluster Help
I bought a cluster from a 1986 Berlinetta with a tach, to go into my 1986 Sport Coupe, which does NOT have a tach... I finally got around to putting it in today and found that the tach is WAYYY off. Both cars were/are a V6 car, the gas gauge and speedometer work perfectly, and i know the other gauges need a sending unit to work, but the tach claims my car idles at 3000 rpm, and at 45 mph, im past red line, and the needle is buried... HELP!
Supreme Member
Joined: Jan 2006
Posts: 3,341
Likes: 12
From: Mooresville NC
Car: LOWERED ♦ CRIMSON METALFLAKE
Engine: ► 400 KUBES ◄
Transmission: 765R4
Axle/Gears: EATON POSI 4.56
Tach This On The Bulletin Board
Your problem is in the circuit inside the dash that moves the pointer.
It’s contained on a small plug-in PCB or integrated in the main board.
On the PCB you’ll see a resistor chip.
Desolder pins 4 & 10.
Use a 500K potentiometer.
Solder it across traces 4 & 10.
Move the potentiometer to half way.
Start the engine and compare the tach reading with a test equipment quality tach.
Dial it in, unsolder one side of the potentiometer, measure it and install a matching resistor.
◙◙◙◙◙◙◙◙◙◙◙◙◙◙◙
Happy Racing!
It’s contained on a small plug-in PCB or integrated in the main board.
On the PCB you’ll see a resistor chip.
Desolder pins 4 & 10.
Use a 500K potentiometer.
Solder it across traces 4 & 10.
Move the potentiometer to half way.
Start the engine and compare the tach reading with a test equipment quality tach.
Dial it in, unsolder one side of the potentiometer, measure it and install a matching resistor.
◙◙◙◙◙◙◙◙◙◙◙◙◙◙◙
Happy Racing!
◙◙◙◙◙◙◙◙◙◙◙◙◙◙◙
If People Drove Any Slower They’d Be Going Backwards
When you see fog or “running” lights on in good weather beware. Low performance driver ahead.
How bout those nitwits too scared to drive without headlights in the daytime,
and the nitwits that need headlights for a little rain
.
.
If People Drove Any Slower They’d Be Going BackwardsWhen you see fog or “running” lights on in good weather beware. Low performance driver ahead.
How bout those nitwits too scared to drive without headlights in the daytime,
and the nitwits that need headlights for a little rain.
.
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Elephantismo
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Feb 13, 2019 12:51 AM