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I am not getting any fuel to the engine. The fuel pump could be bad or there is not any electricity going to the fuel pump..Is there a fuse to the fuel pump on a 1978 datsun 280Z?

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  • scotttimmer Oct 02, 2009

    It does have an electrical fuel pump and it is located in front of the gas tank underneath the car. 1978 Datsun 280Z's have fuel injection. When the ingnition is turned to the "On" position (Not the "start" position) there is no sound coming frm the fuel pump. So does this mean my fuel pump is bad?

  • scotttimmer Oct 02, 2009

    It does have an electrical fuel pump and it is located in front of the gas tank underneath the car. 1978 Datsun 280Z's have fuel injection. When the ingnition is turned to the "On" position (Not the "start" position) there is no sound coming frm the fuel pump. So does this mean my fuel pump is bad?

  • scotttimmer Oct 02, 2009

    It does have an electrical fuel pump and it is located in front of the gas tank underneath the car. 1978 Datsun 280Z's have fuel injection. When the ingnition is turned to the "On" position (Not the "start" position) there is no sound coming frm the fuel pump. So does this mean my fuel pump is bad?

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No dont think so as the pump is fitted to the engine isent it
if not and there is no pump on engine or on eletric one under the bonnet then it must be in the tank .
(But in 78 they were on engine)
Find pump in elect pump put feed wire to pump and it should (tick) if Man pump then take off and get recoed.

Posted on Oct 02, 2009

  • Ronaldbrains Oct 03, 2009

    Yes it sounds like your problem is the pump.. But before you go doing work you dont need check the fuel line to engine,disconnect it at engine side and turn on if fuel comes out pump is working but if not then it has to be removed. But then when its out recheck it by putting feed wire to the pumpwere and a wire to themetal for earth if pump dosent work through it away But if works then its either the pressure or the feed wire on car.. (let me know)

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Check the wires that go into car from pump under rear of car. the wires connect un der the passenger rear seat in my 280z, the wires could have came unpluged

Posted on Mar 02, 2012

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Car is turning over but not getting fuel ideas anyone thanks


There is not much information for a good answer.
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  2. fuel pump not working [fuse,bad pump,broken wire etc]
  3. computer not telling the pump or injectors to work [should set a code]
  4. dirty injectors

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Car turns over but will not start


Check and make sure that the engine is getting fuel, spark and has compression........ Check all fuses.......... If there is no fuel coming from injectors but there is a injector signal, fuel pump or fuel pump electrical circuit could be bad. If the fuel pump in the tank is starting to go bad, some times but not all the time, if you get a rubber mallet and have someone crank the car as you bang on the gas tank with the rubber mallet, the engine should start. This is only a temp. fix. Depending on what vehicle you have, a faulty fuel pump can be accessed from under rear seat, trunk or the tank has to be physically removed from the vehicle in order to service the fuel pump. If the engine has no spark, again, check all fuses.......... Most of the time for a no spark issue, a crank sensor goes bad or the ohm values are out of specs. To ensure that you have a faulty crank sensor, you can either rent or buy a fairly inexpensive scan tool to check for trouble codes and possibly look at live data the the RPM signal. If you crank the engine and the scan tool does not pick up an RPM signal, more than likely, you have a bad crank angle sensor. If the engine has no compression, if the engine has a timing belt....... check and make sure that the belt has not broke, skip a couple of teeth due to bad tensioner or teeth stripped out at the crank due to oil contamination. If your engine has a timing chain, check to see if chain is stretched, broken or skipped couple of teeth due to bad hydraulic tensioner. Hope this helps..........

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2003 olds alero crank no start, thought it was passlock. by passed this, it almost starts with either. cycle the key and pump works but no pressure after that.


Make sure you're getting power to the fuel pump after start up. GM cars provide power to the electric fuel pump via the starting circuit when cranking and switch to alternator/battery power via the fuse block and 12v relay with ignition on in run position. Check your fuse block (bad fuse; power not getting to part of fuse block) and fuel pump relay. Could also be plugged fuel filter, bad pump or ?. but not likely because you get fuel while cranking. Check for error codes in the engine control computer (GM OBDII) as well but that probably won't show anything. Good luck and good hunting. I had a similar problem with a Chev Astro. Turned out to be power not getting to one bank of the fuse block because of a burned junction terminal buried behind the battery under the hood. Get out the multimeter and start looking for failed electrical components or broken wires.

Jan 21, 2014 | Cars & Trucks

2 Answers

I check the power going back to the fuel pump but there is no power at the fuel pump


I am confused if you are checking the power back to the fuel pump ? how far back to the pump?
if you take some wire ( if you know what you are doing ) and jump the pump straight to the battery will it run ( watch electric polarity )
then you know if the pump is working or not.
All modern cars with electric fuel pumps have cut-off switches/ pressure switches.
if the engine failes to start the pump is shut off, if one of these switches or a fuse is bad the pump will not get power.
If the pump is in the gas tank, and you have power up to the tank but the pump will not run - you need a new pump.

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1 Answer

It appears the vehicle is not getting any fuel. where is the fuel pump fuse and or the cut off switch.? the tank selector seems to b a problem as well, i think one of the tanks are bad... where can the...


you've got dual tanks? the selector switch may be bad,on the dash., check those 1st. remove the panel that switches the tank to tank,make sure that the connections good. switch to main tank and make sure that fuels in the main tank.if you have fuel in main tank,thats good. but keep in mind that you also have an electric fuel pump,located just under the driverside door frame.when you turn your key to 'on' position,do you hear that electric fuel pump humming for 10 to 15 seconds? been there and done that before. because you have 2 tanks it takes alot of fuel pressure to power your engine. when you turn your keyswitch 'on' do you hear the fuel pump humming? if not,then you can check the main fuse box under the hood. look for a square black box,usually on driverside fenderwell under the hood. lift cover off and check for blown fuses or bad relays. under the fuse cover you should see locations of relays and fuse locations. the #1problem{fuel related} with your year truck is a bad electric fuel pump. take my advice and replace the pump with the replacement pump recommended by advance auto,or nappa auto parts. or else dealer parts. autozone parts come from mexico[mostly] i hate to promote anyone autoparts,but learn by my own hard work replacing bad parts and by whats warranty and whats not.thank you for choosing fixya.com and feel free to choose your own parts store! i do however,promote fixya.com!!!!

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2 Answers

No fuel getting to the engine 1995 Chrysler concorde


Sounds like you have a bad fuel pump module. Here's some steps to make sure.
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2nd you need to check the fuel pressure under the hood on the engine. Located on the fuel rail is a small valve that looks like a air fill valve for a tire. If you have access to a guage you can check it yourself. If not then you can spray starting fluid or carb cleaner into the air intake ( after the air filter) and the engine should start. You may have done this step already to find the no fuel scenario. If the motor starts then either your fuel pump is not getting the voltage to turn on (fuel pump relay in this case) or your fuel pump is bad. This would be the most likely case and unfortunately the more expensive culprit.

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1 Answer

Engine will not start.fuel pump does not run. intermittent problem. has been getting progressively worse. have changed fuel filter. checked electrical connectors.need accurate wiring diagram. chiltons...


start by checking the fuel pump fuse and relay. will the fuel pump run for a few seconds when you turn the key to the run position? If so you may need to replace the crank position sensor. When this goes bad the engine will turn over and start, but only run for a second or two then die like its out of gas.

If you do not hear the fuel pump coming on and the fuse and relay check out good then you will have to see if there is power going to the fuel pump. if power is present at the fuel pump plug then the fuel pump is bad

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1 Answer

Need to crank engine 3 to 4 times then you can here the fuel pump activate then the car starts


sound like either fuel pump or fuel pump relay. You can have someone tap the top of the relay when the problem occurs and see if that restores power to the pump. Or you can unplug the pump and check for 12v when the key is turned. If you have power then the pump is bad. No power...then the fuse or fuel pump relay is bad. Not common but possible is a bad electrical ground or faulty electrical connector.

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2 Answers

Engine started and died. Will not restart. Seems to be electrical issue - what fuses or relays should be checked? Thanks.


Does it run if you put gas into the throttle body? If so, then it may be a fuel pump going bad, or the circuit to the fuel pump is dead.

Test for power at the fuel pump, then, when ignition key is on.

Test for pressure of fuel using a gauge at the fuel rail.
---
Basic Fuel System Diagnosis Two of the most import diagnostic checks, when dealing with a driveability problem involve the ignition and the fuel systems. The questions most technicians attempt to answer first are "is there spark?'' and "is there fuel?'' This often leads to solving most basic problems. For ignition system diagnostic testing, please refer to the information on engine electrical components and ignition systems found earlier in this manual. If the ignition system checks out (there is spark), then you must determine if the fuel system is operating properly (is there fuel?).
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chv_sub_25_undr-hd_fuse_blk_lbl.gif

The fuel pump relay under the hood in the fuse box is located in the middle.

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1 Answer

No fuel getting to engine. wont start.


The computer is not resettable in a 1995 Lumina. If the fuse was blown and you replaced it and it worked, then that leads me to believe there is an electrical problem on that circuit.

Check to see if the fuel pump is working and if it has power.

Common problem is to have fuel pump go bad on GM vehicles.
Had a 1999 Ford Expedition with a bad fuel pump and it worked after replacing it.

Good luck to you.

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