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Why does the fuel pump on 1993 ranger not shut off when switch is in on position?i replaced the fuel pump,filter,&p[ressure regulator & it still runs constantly.what now

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There should be a fuel pump relay located somewhere under the hood. The relay may be your problem.

Posted on Nov 08, 2014

6 Suggested Answers

6ya6ya
  • 2 Answers

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Posted on Jan 02, 2017

SOURCE: 92 ford ranger

check your vacuum lines if one is off then it will do that too.

Posted on Jun 29, 2008

  • 136 Answers

SOURCE: Ranger fuel problem

There is a fuel cutoff switch on the passengerside floorboard, towards the right kick pannel, there will be a little red button on top of it, check to see if that is tripped, also when you turn the key to the on position listen to see if you hear the fuel pump prime up, just a short buzzing noise from the underside of the cab, if you dont hear it, that is a good indicator that your fuel pump maybe bad, i would also check the pressure at the fuel rail, chrome or black colored bar located near the fuel injectors.

Posted on May 05, 2009

savindude
  • 175 Answers

SOURCE: 1993 chevy lumina van acts like it is out of gas

The question is how much pressure is actually getting to the fuel rail and engine. Ideally you should test the pressure at the rail to see how much pressure you're actually getting. If it's fuel injected it should be around 50 - 60 lbs, carbuerated should be much lower. Depending on the outcome, possibilities, fuel pump, strainer ( located in the tank), filter or maybe a plug in the fuel lines or problem with injectors. Good luck. If this helps, please rate this. Thanks

Posted on Jul 04, 2009

SOURCE: 1992 Dodge Grand Caravan 3.3l dies on highway.

Its normal for the pump to run for three seconds then shut off if the car engine is off. . This indicates that the fuel pump turned on and the pressure did reach specifications. If the pump did not reach pressure the pump would continue to run, You need to check for proper pressure with a gauge. If tthe pressure is ok then you have another issue like an ignition module or crank sensor if applicable. You may have to drive the car with the fuel gauge hooked up to see if you still have pressure when it dies.. I know you said you replaced the pump already but do you have the same issues as before you replaced it. This would indicate which direction you need to go now. If the same then its prabably not the pump.

Posted on Sep 20, 2009

  • 79 Answers

SOURCE: 93 mazda mx6 wont run. will start but runs very

If yours is the v6 2.5 the tps is adjustable and you can turn it up and down. On my mazda it acted like it was in the fuel system and i ended up replacing the distributor.

Posted on Feb 06, 2010

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Why does the fuel pump on 1993 ranger not shut off when switch is in on position


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I have a 1993 Ford ranger and the fuel pump keep going bad everything in the system is new pump filter fuel pressure regulator. What could make it keep going out and I have tried pumps from different...


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You've already eliminated the spark plug & wireset, distributor cap & rotor.
Sounds like your car needs a tune-up, specifically, the PCV (positive crankcase ventilation) valve, and/of the EGR (Exhaust Gas Recirculation) valve.

Components checked/replaced during a tune-up are:
air filter
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Troubleshooting the no-start condition - from the 1990 Mitsu Mighty Max Repair Manual:

Priority Action Part Type -- Cause
1 Inspect Battery -- Battery Discharged or Faulty.
2 Inspect Battery Cable -- Corroded, Broken, Shorted or Poorly Connected Battery Cable.
3 Inspect Distributor Cap -- Distributor Cap Cracked or Burned.
3 Inspect Fuel Filter -- Clogged or Dirty Fuel Filter.
5 Inspect Ignition Coil -- Faulty Ignition Coil.
6 Inspect Wireset -- Worn, Damaged or Faulty Spark Plug Wire(s).
7 Inspect Spark Plug -- Incorrectly Gapped or Fouled Spark Plug(s).
8 Inspect Starter -- Starter Motor Faulty.
9 Inspect Fuel Pump -- Low Fuel Pressure.
10 Inspect Solenoid Switch -- Faulty Starter Solenoid Switch.
11 Inspect Fuel Pump Relay -- Faulty Fuel Pump Relay.
12 Inspect Fuel Injector Pressure Regulator -- Faulty Fuel Injector Pressure Regulator.
13 Inspect Ignition Switch -- Improperly Connected or Faulty Ignition Switch.
14 Inspect Starter Drive -- Faulty Starter Drive.
15 Inspect Fuel Injector -- Dirty or Worn Fuel Injectors.
16 Inspect Fuel Pump Strainer -- Clogged or Dirty Fuel Pump Strainerat.
17 Inspect Engine Control Computer -- Incorrect Operating Information Being Delivered and Sent From The EEC.
18 Inspect Fuel Tank -- Fuel Tank Empty.
19 Inspect Carburetor -- Carburetor Flooded or Faulty Choke.
20 Inspect Distributor -- Worn, Loose, or Incorrectly Installed Distributor.

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Jun 23, 2009 | 1993 Ford Ranger SuperCab

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Ranger fuel problem


There is a fuel cutoff switch on the passengerside floorboard, towards the right kick pannel, there will be a little red button on top of it, check to see if that is tripped, also when you turn the key to the on position listen to see if you hear the fuel pump prime up, just a short buzzing noise from the underside of the cab, if you dont hear it, that is a good indicator that your fuel pump maybe bad, i would also check the pressure at the fuel rail, chrome or black colored bar located near the fuel injectors.

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1993 E-350 Fuel pump not powering up.


1994 econoline fuel system electrical

Vehicle Application Escort/Tracer, Crown Victoria/Grand Marquis, Thunderbird/Cougar, Town Car, 5.0L Mustang, Aerostar, Ranger, Explorer, E-Series and Bronco.
  1. The electrical circuit of the Inertia Fuel Shutoff (IFS) switch may vary per engine/vehicle application.
  2. Inertia Fuel Shutoff (IFS) switch with fuel reset light (F-Series and Bronco).
  3. Inertia Fuel Shutoff (IFS) switch with fuel reset light (Town Car).
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Fuel Pump Circuit Operation When the ignition is switched to the ON position, it turns the EEC Power Relay on. The EEC Power Relay provides power to the EEC-IV processor and the control side of the fuel pump relay. Power for the fuel pump is supplied through a fuse link or high current fuse attached to the starter solenoid (battery side). From the fuse link or high current fuse, current flow is through the fuel pump relay and Inertia Fuel Shutoff (IFS) switch to the fuel pump. The IFS switch is a safety device used to shut off the fuel pump in the event of a collision. If the IFS switch is "tripped," it must be reset by depressing the white or red button on the top of the switch. The fuel pump relay is controlled by the Powertrain Control Module (PCM).
When the ignition switch is turned to the ON position, the fuel pump will operate. If the ignition switch is not turned to the START position, the PCM will shut the fuel pump off after approximately one second. The PCM will operate the fuel pump when the ignition is in the START position to provide fuel while cranking.
After the engine starts, the PCM will continue to operate the fuel pump unless the engine stops, engine speed drops below 120 rpm, or the IFS switch is "tripped."

System Diagnosis Note: Grounding the FP lead at the DLC will allow the pump to run continuously with the ignition switch on.

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