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Lou6t4gto
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SEP 16, 02:12 PM
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this one (1985 2.5/auto) loses pressure WHILE RUNNING.
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shemdogg
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SEP 16, 05:22 PM
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So either the power to the fuel pumps crapping out, fuel pumps crapping out, or the pressure line is leaking inside the gas tank.
shem
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Lou6t4gto
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SEP 16, 06:50 PM
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new pump, new submersible line, new relay
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shemdogg
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SEP 16, 07:02 PM
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Sounds like stuff that happens to me lol. One of em might be bad, Ive gotten bad new parts before. On my car the fuse connections are dirty and it would cause my fuel pump to lose power off n on. Run a test light on the fuel pump circuit and watch for the light to go off when the motor dies. Good Huntin
shem
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shemdogg
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SEP 16, 07:05 PM
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The fuel pump power runs thru the oil pressure sender, u may check there too...
shem
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Lou6t4gto
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SEP 16, 07:15 PM
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olejoedad
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SEP 16, 07:19 PM
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Check the connection at the top of the tank, where the three wires go through the fuel pump/sending unit fitting.
It may be a long shot, but I have seen problems there.
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1987 Trans Am
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SEP 16, 09:05 PM
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Maybe a faulty fuel pressure regulator? Allowing fuel to just free back into the tank?
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Lou6t4gto
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SEP 16, 11:25 PM
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NEW fuel pressure regulator, rebuilt TB, new injector,filter, hoses,relay,. pressure starts and remains perfect until(at any given time) it just shuts off.
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shemdogg
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SEP 16, 11:52 PM
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Best way to test this would be w a trouble light wired into the fp circuit, that way U could see if the powers getting there but the pump stops, or the power stops and the pump stops whenever it does stop. Definitely do the wiggle test on every harness. While the engines running of course.
shem
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