1985–1988 Pontiac Fiero Tachometer Circuit Board – Pre-Calibrated (4-Cyl, V6, V8 Swap)

1985–1988 Pontiac Fiero Tachometer Circuit Board – Pre-Calibrated (4-Cyl / V6 / V8 Swap)

Direct-fit tachometer circuit board replacement for 1985–1988 Pontiac Fiero. Ships pre-calibrated for your selected engine option (4-cyl, V6, or V8 swap) and installs with a simple bolt-on procedure—no soldering required.

Features & Benefits

• Pre-calibrated for accurate RPM readings (option selected above)
• Direct replacement for the original Fiero tachometer PCB
• Bolt-on installation with no wiring changes
• Automotive-grade components, Made in the USA
• Built-in diagnostic LEDs for power and signal verification
• Photo-based installation instructions included

Fitment & Compatibility

• 1985–1988 Fiero with 4-cyl or V6 and tachometer & oil pressure gauge cluster
• 1986–1988 Fiero V6 with tachometer-only cluster (no voltage gauge)
• V8 option available for Fieros with compatible engine swaps
• Not compatible with clusters that use a voltage gauge

What’s Included

• Pre-configured tachometer circuit board (4-cyl, V6, or V8 option)
• Mounting hardware
• Printed installation instructions with photos

Frequently Asked Questions

Do I need to calibrate this board?
No. The board ships pre-calibrated for the engine option selected at checkout.

Is soldering required?
No. Installation is bolt-on using the factory mounting points.

What are the diagnostic LEDs for?
Built-in LEDs indicate ignition power and tach signal input, helping with basic troubleshooting.

Will this work with a V8 engine swap?
Yes, a V8-calibrated option is available for compatible engine swaps.

Why won’t this work with a voltage gauge?
Fiero clusters with a voltage gauge use a different tachometer design and require a different circuit board.

For 1984 Fiero with a voltage gauge, see: 1984 Fiero Tachometer Circuit Board (with voltage gauge)