Question about 1993 Nissan Maxima

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No fuel when you turn on the key

Is there some kind of rollover relay or reset switch I need to reset?

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Power to pump make sure the pump is working

Posted on Jun 23, 2008


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1 Answer

I have opened the old relay and when I turn on the ignition the fuel pump does not function but when I press on the relay myself it does function...could it be the wiring or the fuel pump itself?

Could be a bad relay , fuse that supplies relay, or some other current supply to the relay, such as rollover switch or ECU not getting some feed it needs so won't turn on fuel pump. Check fuse first.

Sep 12, 2016 | Volkswagen Polo Cars & Trucks

2 Answers

I changed my fuel pump and filter and the reset switch why im not getting fuel to the engine

Anti-theft system light on ? Security light ? What reset switch ? What make model an year vehicle ! All vehicles from 1996 on, the PCM/ECM - engine computer controls the fuel pump relay . If there isn't a crankshaft position sensor input to the PCM / ECM ,the PCM / ECM will not energize the fuel pump relay ! There are a few good videos on youtube on fuel pump electrical circuit testing . You need to test the circuit before replacing parts . Parts stores love guy's like you , your helping to make them rich !

Aug 22, 2016 | Cars & Trucks

1 Answer

2001 ford expedition. No power to fuel pump. Not the relay, what could it be?

Check all fuses, check the rollover switch and reset if popped.
Need more info, is check engine light on- ecm turns fuel pump on.

Oct 10, 2015 | Ford Cars & Trucks

2 Answers

Cannot get power to fuel pump

You don't mention what kind of car it is, but typically, the only time power goes to the fuel pump is when the ignition switch is first turned on and it will run just for a few seconds and then quit. When I replace the fuel pump I will cycle the ignition switch several times, leaving it on for about 5 seconds or so to get fuel to the injectors. This is all controlled by a relay.
Once the vehicle is started it receives signals from the oil pressure to a relay to keep the fuel pump running. This was a safety feature so that the fuel pump would not run in case the ignition was left on or the vehicle was in an accident.

Jan 05, 2015 | Cars & Trucks

2 Answers

Where is the reset button for fuel pump c

I think the reset switch is in the rear quarter panel. Open the rear hatch and remove the passenger panel. I am not positive on this it could be on the other side. But on the 1990's vintage it was on the right. This switch is used for "roll overs" to shut of the fuel. You might have a bad pump or clogged filter instead.

Jul 30, 2014 | 2000 GMC Jimmy

1 Answer

Car will turn over but won't start. Through the

No noise from fuel pump when you turn over the car .First thing get voltage at fuel pump relay checked, is there 12 volt to the relay.If no, then problem is again the relay.--------- To reconfirm the problem, try other test, that is remove the relay and by pass the relay terminals with a jumper wire .Then with 12 volt external battery give power to fuel pump connector and see, if the fuel pump starts, then its clear that fuel pump relay is faulty.----------- Also other problem can be fuel pump inertia switch.If the inertia switch is faulty then also fuel pump will not start.-------- The fuel pump relay on a 1995 Ford Explorer is in the power distribution
box, in the engine compartment, driver's side near the firewall.----------
The fuel pump inertia switch is in the right front passenger area
it is below the dash but above the carpet in the right hand corner.--------
Its a push button type inertia switch.
Fuel Pump Activation
When ignition switch is turned to START position, PCM operates fuel pump relay to provide fuel for starting engine. PCM senses engine speed and shuts off fuel pump by opening ground circuit to fuel pump relay when engine stops or engine speed drops to less than 120 RPM. When ignition switch is in ON position, EEC power relay is energized (contacts closed). Power is provided to fuel pump relay and timer in PCM. Fuel pump receives power through fuel pump relay contacts.
Inertia Fuel Shutoff (IFS) Switch
All models use an electrical interrupt switch in fuel system. During a collision or vehicle rollover, electrical contacts within inertia switch open, shutting off fuel supply to electric fuel pump. Fuel supply is interrupted even when engine is running.
A reset button is located on switch assembly. If electrical circuit trips, vehicle will not restart until switch is reset. Fuel system should be inspected before resetting switch.
IFS switch is located under instrument panel, near right side of transmission hump.
----------- If the fuel pump relay, the inertia switch and fuel pump all checked ok, and fuel pump is working with direct 12 volt source to fuel pump.Then problem relates to computer.The computer (power control module, PCM) is faulty and has to be replaced.--------- This will help.Thanks.Helpmech.

Jul 17, 2011 | 1995 Ford Explorer

1 Answer

No power to fuel pump

2 possibles
fuel pump relay
or rollover switch needs to be reset,

Apr 16, 2010 | 1990 Ford Econoline

1 Answer

Were can i locate the fuel regulator on my 2002 explore. change the fuel pump explore still wont start. still acts like its not getting fuel

before you do anything else , scan your vehicle with an OBD 2 scanning tool . If you don't get any codes: make sure your fuel pump cycles on for a few seconds when you turn the key from off to on, (you can hear it huming}...if it does then replace the in line fuel filter. if your fuel pump doesn't cycle for a few seconds when the key is turned on, check your fuel cut off (vehicle rollover )safety switch and reset it if necessary. finally , check the fuel pump relay circuit.

Mar 03, 2010 | 2002 Ford Explorer

1 Answer

Fuel pump not working

I don't know of any rollover switch, but there is a fuse and relay, chk. them. Fuel pumps go bad, common problem on G.M. cars and trucks.

Feb 16, 2009 | 1999 Oldsmobile Alero

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