As my fuel filter started plugging I would see the same thing. I'm not saying the gauge is not the problem but my car would seem to run OK, too. It's a cheap and not bad idea anyhow to change your filter and see if the pressure improves. I also removed the sock in the tank as it was catching stuff also. I'd rather rely on the inline filter. I wound up getting an Autometer electric pressure gauge and mounted it in the car.
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Rick Dorion
69 RS Conv,355,M20,4.10's and I don't worry about stone chips ( yet ).
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Rick Dorion
69 RS Conv,355,M20,4.10's and I don't worry about stone chips ( yet ).