Tach on Gauge Cluster

[AlonsoV]

I replaced my gauge cluster in my 92 4.3 5spd so I could have a tach but it reads low by about 500-600 once it gets past about 2k rpm, how could I go about fixing that?

 

[PlayingWithTBI]

I replaced my gauge cluster in my 92 4.3 5spd so I could have a tach but it reads low by about 500-600 once it gets past about 2k rpm, how could I go about fixing that?

Is your cluster from a V8 truck? The tach will read about 75% of actual RPM.

 

[AlonsoV]

Is your cluster from a V8 truck? The tach will read about 75% of actual RPM.

I'm assuming it was since the truck I pulled it from was missing an engine, could the problem be fixed my messing with the gauge cluster or would I have to get one from a V6 truck?

 

[PlayingWithTBI]

could the problem be fixed my messing with the gauge cluster or would I have to get one from a V6 truck?

IDK, maybe someone else could answer this. There may be a jumper somewhere to make it work with your 6 popper. Otherwise, you'll need one from a 6.

 

[someotherguy]

For the 1992-1994 clusters there should be a capacitor you can change if you're decent at all with electronics desoldering/soldering work. Here's the info from a Chevytalk member that should help:

To make it read the correct RPM you will need to change capacitor (C103) on the circuit board.
The V6 uses a .0033uf (3300pf), and a V8 uses .002475uf (2475 pf).

Richard

 

[AlonsoV]

For the 1992-1994 clusters there should be a capacitor you can change if you're decent at all with electronics desoldering/soldering work. Here's the info from a Chevytalk member that should help:



Richard

Thank you, this is very much appreciated