Question about 1989 Nissan Pulsar

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1987 nissan pulsar

Won't start, no power source to fuel pump, bypassed fuel relay still won't start, engine does start when injection is primed

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Question is, does fuel pump relay come in/ go out when ignition switched on? How do you know "no power source to fuel pump", was that because bypassing the relay didn't cause it to run? Or did you check for supply to the pump and find nothing doing?.
Sounds rather like a frozen pump to me... or a blown fuse??

Posted on May 31, 2008

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Car has been sitting up and will not start now. It seems to not be getting gas and I do not know how to prime a fuel injection system. Any help appreciated.


There is only a few cars fitted with an ancient petrol injection system that needed any priming.

Diesel engines mostly need the injection system priming but petrol injection systems do not.

Lots of cars use a system where the fuel pump runs for a couple of seconds when the ignition is switched on and that is all the time it takes to prime the fuel system. After a couple of seconds the fuel pump switches off and waits to restart when the engine is cranked.

As priming the system takes only a couple of seconds some manufacturers don't bother with the brief priming run of the pump and just have the pump start when cranking.

Could be faulty supply, fuse, pump relay or the pump itself.
If the car is fitted with an immobiliser, perhaps that is the problem.

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I have a 1990 n13 pulsar , where is the fuel pump relay


Some Nissans put that relay and 3 others above or on the fuse panel under the dash. Far left one was the Accessory relay, then the Ignition relay, next was the ECCS relay (the ecu relay), and last on the right was the fuel pump relay, if I recall correctly. I'm pretty sure everyone was exact same relay, same part number. I also believe the fuel pump fuse was in that fuse panel.

Sep 26, 2015 | 1990 Nissan Pulsar

1 Answer

How To bypass the Fuel Pump Relay


Don't bypass the fuel pump relay . power to the relay comes from the ignition switch on start cycle .when the engine is running the oil pressure switch takes over the circuit .so if you crash and the engine .stops so does the pump . If the fuel line brakes a bypassed pump will keep pumping spraying fuel and you could burn.

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Injector not working why put new injector new computer new fuel pump does it have injector relay 1987 celebrity


Check fuel pressure. Have you replaced the fuel filter on schedule? Verify that the fuel pump is getting power. Power goes through an in-line fuse, then the fuel pump relay or the oil pressure sensor. (The relay bypasses the oil pressure sensor while the engine starts, but fuel pump power goes through the sensor during normal run operation. If you lose oil pressure, the fuel pump is shut off to protect the engine.) On four-cylinder models, the fuse is in the fuse block (E PUMP 10)
The fuel injectors are connected to the ECM fuse on one side and straight to the engine computer on the other side. Check the connectors and wiring, especially at the injector.

Aug 26, 2011 | 1987 Chevrolet Celebrity

1 Answer

I have a new pump and there was no power going into it. so i ccut the wires and want to run it to another power source. can i run it to the fuse box and it work the same? also since its fuel injected i...


did you check the fuse for the fuel pump you don`t say.there is also a fuel pump relay in the system.if you bypass the system then the ecm won`t have control for the pump,which controls the 2 second prime at the beginning when key turned on and it won`t shut off the pump in case of an accident when the engine stops.you can bypass it but its not recommended because this.if you do bypass make sure you have a 25amp fuse wired into the power wire and a on/off switch that you must remember to turn on and off every time you drive the car.

Mar 31, 2011 | Chevrolet Caprice Cars & Trucks

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Fuel pressure regulator for nissan nx se 1987. Where is is located its not on the fuel rail. Ive looked, ordered the new one due to the fact its the only thing that could be causing the problem.


Sit on the end of the fuel rail, where the injector's are at, is held on with three small bolt's, that's on fuel injection engine's, if it's a carburetor engine, don't have fuel regulator.

Sep 24, 2010 | 1987 Nissan Pulsar

3 Answers

1997 nissan altima will not start


OK...Some cars use a "prime" relay and a "run" relay on the fuel pump. since manually priming it seems to work, I'd check and see if you have a similar system. If so, the prime relay may be bad.

Jul 30, 2009 | 2002 Nissan Altima

1 Answer

Will turn over will not start was fine 12 hrrs ago getting fuel


may be the green relay on the drivers side of the firewall.

Feb 26, 2009 | 1987 Nissan Pulsar

1 Answer

1987 4.3L starting difficulty


First off, I'm a great believer in the simple solution. If jumping the relay works, then replace the relay.

As far as a relationship between fuel pump operation and oil pressure, coincidence of operation.

If the new relay fails you, I'll need some more info:
  • Fuel Injected? If you turn the key on (not to start) do you hear the fuel pump come on for a sec then shut off?
  • Hard to start when hot, cold, doesn't matter
  • When it does start, does it idle ok? erratically? High? Won't stay running? Dies immediately?
  • Does it blow smoke? Black? Blue? White?
  • When driving, does it lack power? Stumble? Stall?
Hope it's the relay

Mike

Jun 18, 2008 | 1987 Chevrolet Astro Cargo

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