Question about 1995 Buick Riviera

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Fuel pump Is there a way to check the fuel pump ,like a bypass or test panel

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Turn key on and have someone listen at fuel door for pump to run, there is a lead on drivers side with green connetor that you can jumper a fused wire to make the fuel pump run. if the fuel pump does not run try tapping with a rubber hammer on fuel tank when someone turns key on, be sure to check your fuses

Posted on Nov 30, 2008

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Bypass fuel pump circuit to run pump


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The main fuel pump in a Volvo is really well built and rarely fails (Bosch simply makes great fuel pumps). A good survival trick if you think a main fuel pump might be bad... give it a quick tap with a wrench. For best results, if possible, tap the pump when cranking the engine (while power is going to the pump). If the pump is bad, often the tap will make it come to life and it may stay running until you shut it off. This trick can get you back on the road and get you home in an emergency. If it's a bad fuel pump relay, this will NOT work as there will be no power going to your pump. If this is the case, you might try the below relay bypass "jump" trick to get power going to the pump. TESTING YOUR FUEL PUMP
How to "JUMP" the fuel pump circuit at your Volvo 240 fuse panel:The fastest method to make the main fuel pump run (bypassing the Fuel Pump Relay) is by jumping two circuits at the fuse panel (left side driver's kick panel).

You can make a jumper from a wire with stripped ends or even a straightened paperclip. Jump the circuits on the right side of the fuses for best results
For a 1979-84 240, jump fuse circuit #5 to #7.
For a 1985-93 240, jump fuse circuit #4 to #6.


If the main fuel pump doesn't begin running when jumped (you should definitely hear it humming), you either have a faulty fuel pump or faulty wiring to the pump (bad wiring is really common under an old 240, near the pump). This test of course assumes your battery is good.
If one of the fuses blows during this test, the pump circuit wiring is shorting to ground somewhere between the fuse panel and the pump.

thx



Jan 18, 2012 | 1984 Volvo 240 Series

1 Answer

Fuel pump does not work, is there an inertia switch on it? The connector wire shows 12 volts but will not light test light. Jump the wire from fuse block under the hood to the fuel pump and it works, is it...


under the hood in the black main relay and fuse box.look for fuel pump relay.the relays most likely bad. or a loose wire to the fuel pump.has it been wrecked? have to ask yourself alot of questions when you bypass the pump straight to battery and it works. start with simplelest 1st. check main fuse relay and fuse panel 1st.then go to wiring harness that goes to the pump. thank you for choosing fixya.com.

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Chevy Cheyenne 2500 not gettibg fuel. I bypassed filter, it was somewhat plugged. Still not getting fuel. How do I check relay vs pump?


Listen at the tank filler area while someone turns the key on (don't try to start), You should hear the pump run for a short time, then shut off. If it keeps running, then the pump is likely worn out. If the pump runs at all, the fuse and relay are ok. You can check fuel line pressure (rent a test kit) at the test port (looks like a tire valve) on the fuel rail just above the injectors. You should read about 45 PSI--anything much lower, suspect the pump or pressure regulator.

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2 Answers

1994 buick park avenue . driving home and shut off


how did you jump the fuel pump relay, by bypassing the relay or by applying power to contact that closes the relay? If you bypassed the relay completely you need to b ench test the relay you can do this easily by using any 12v dc power source. If you tested the fuel pump relay by applying power to the relay and the pump run and developed pressure. I suspect a wiring or ground issue. Good luck

Oct 07, 2009 | 1997 Buick Park Avenue

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