Oil Pressure Gauge Bouncing

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Aug 11, 2003
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I have an aftermarket oil pressure gauge in my '73 FJ40. Parked, the needle is fine and shows the correct operating pressure. When I drive, the needle vibrates and bounces around, but is still near the correct pressure. How do I get the play out of the needle?
 

76FJ40

Old Fart
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If it's an electric gauge, you likely have either a short to ground in the wire to the sending unit or a bad sending unit. If it's a VDO gauge, you can get diagnostic instructions at the VDO site.
 
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Its not electric. Its got a stainless hose that goes from the rear of the intake manifold (near the distributor) to the gauge. Oil comes thru the hose to the gauge.
 

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