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Old 06-07-2012, 10:49 PM
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Need help with temp and oil pressure gauge

It's a 1986 Firebird.

Oil pressure gauge: With key on, it doesn't blip to max then back to zero. When I start the car it always goes to 60 psi and stays there.

-with IGN on, I can get the needle to max when I disconnect sender wire.
-IGN on and sender wire grounded to negative battery it stays at 0.


Temp gauge: ign on, it never blips to max then back to 100. When I'm letting it warm up in park, I can see the gauge start to move higher a little bit (like it's working fine), then whenever I hit the brakes the needle goes straight to zero.

-can't get gauge to max when sender wire is disconnected.
-gauge stays at the bottom when grounded (100 degrees)

The rest of the gauges work fine.

I don't know what to do next.
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