Fuel Pressure 1970 Cutlass Sumpreme 350

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Old December 6th, 2011, 12:28 PM
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Fuel Pressure 1970 Cutlass Sumpreme 350

This weekend I got around to installing a Edelbrock Performer RPM intake, Holley 670 Street Avenger, new Carter Muscle car fuel pump and fram inline fuel filter.

When I first fired up the car the fuel pressure was very low almost non existent according to the fuel pressure gauge. It stayed like this all day when I was driving around town.

The next day I fire up the car and checked the fuel pressure gauge and its reading about 5 psi. Could I have a faulty fuel pressure gauge, clogged fuel lines, bad fuel pump?

Thanks,
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Old December 6th, 2011, 12:40 PM
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5 psi sounds about right. If your pressure was non existent the car wouldn't run. I'd keep an eye on it and see what happens. It may have been stuck from sitting and just took a bit for it to free up.
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Old December 6th, 2011, 01:03 PM
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thanks Randy, the car was sitting for about a month before I decided to work on it this past weekend.
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Old December 7th, 2011, 05:49 PM
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So today i fired up the cutlass and now the fuel pressure guage is reading 3 psi. Any suggestions on what might be causing the sporatic fuel pressure.


thanks,
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Old December 7th, 2011, 07:09 PM
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If the car is running fine, I'd stop looking at the gauge.

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Old December 7th, 2011, 07:15 PM
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x2 with mdchanic. I had a pressure gauge bounce between 5 and 10 all day long but the fuel bowl levels stayed the same drove fine so i left it alone.
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Old December 8th, 2011, 07:49 AM
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Ok thanks guys
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Old December 19th, 2011, 10:34 AM
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I ended up changing the fuel filter and now fuel pressure is reading 6.5 psi all day.
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