Electronics Need help wiring something up? Thinking of adding an electrical component to your car? Need help troubleshooting that wiring glitch?

New problem with gauges, tach

Old May 3, 2010 | 12:14 PM
  #1  
Charlz B.'s Avatar
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Joined: Mar 2004
Posts: 120
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From: South Charleston, WV
Car: 87 IROC-Z
Engine: LB9
Transmission: 700R4
New problem with gauges, tach

I'll preface this by saying I appreciate everyone that provides great information everytime I have a problem. Hopefully, I can learn enough to help a few others out eventually.

That said, my battery guage is dead at 0, the tach does not move and stays at approximately 800rpm, oil pressure gauge shows about 2 lb., and the fuel guage is doing it's own thing from moment to moment. Speedometer and odometer are working properly it appears.

This started after a distributor rebuild and retiming recently. I know the tach used to be reliable, but have always questioned the temp gauge, fuel gauge, battery gauge. I just installed a new fuel pump and the fuel gauge used to work, although it would hang at full sometimes.

Where do I begin chasing this gremlin?
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Old May 3, 2010 | 01:58 PM
  #2  
NINÅ's Avatar
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
Ground To A Halt

You might have a ground that came loose at or near the dash connectors.

With an ohmmeter you can trace the ground.

Or sometimes the dash circuit board develops a crack causing similar problems.


Happy Racing!


How bout those too scared to drive without headlights in the daytime and the ones that need headlights for a little rain
.
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