Question about 1992 Jeep Cherokee Sport

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Replaced fuel pump,relay switch,checked fuses,still no start

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  • Richard Scordino May 11, 2010

    what testing have you done and how?

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  • Master
  • 474 Answers

Check the spark they are known for loosing the coil.let me know how you make out please.

Posted on Feb 04, 2010

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Posted on Jan 02, 2017

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  • 7 Answers

SOURCE: 2004 Audi A4 3L won't start

the problem is not the relay switch the problem to me sounds like the fuel filter needs to be replaced so i wouldnt be messing with the relay switch because the relay switch would be harder to replace.

Posted on Aug 19, 2008

  • 1071 Answers

SOURCE: 2000 kia sportage pump is working relays have been

there is a splice for fuel injectors at the front of the fuel rail conduit and electric tape will need to be removed to see if it is ok then clean up all engine grounds and ecm grounds on passenger side kick panel if this doesnt help check coils and crank sensor

Posted on Jul 22, 2009

  • 491 Answers

SOURCE: have no voltage to fuel pump. have checked fuse,

You are checking on the gray wire at the pump.
This wire will ONLY have power for 2 to 3 seconds after key is turned to run position after key has been OFF for 10 seconds.
.....or when there is oil pressure.
If you do not have power under these conditions.....run a new FUSED power wire to the pump/pump wiring that has only power when the key is on.
The other way to fix this is usually a rewire of the relay center/fuse box to supply power to the fuel pump relay when the key is on.

Posted on Aug 23, 2009

Molson02536
  • 3854 Answers

SOURCE: 2003 GMC Yukon - fuel pump

Check your ECM fuse. There should be 2 fuses for your ECM. It's the ECM that controls the function of the fuel pump. Good luck friend and it's also common for the wire harness from the frame to the fuel pump to go bad due to corrosion from the bad weather we get in the winter and rainy spring and fall. 

Posted on Sep 04, 2009

SOURCE: Where is the location of the fuel pump relay

Did it run fine prior to replacing the alt and battery? Check over where you have been working,sometimes things get bumped/disconnected. Fuel pump shut-off switch is in one of the kick panels near the inside of the doors. Reach up over the top of the kick panel. The pump relay are near the battery. What happens on this model too,is the heater leaks on the computer,which is under the heater core.The coolant/water shorts it out.

Posted on Oct 08, 2009

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Why want my 93 ford ranger pick up start without pouring gas into the intake fuel pump want come on unless hot wired straight to batt


There is a fuel shut off switch (inertia fuel shut off-opens on impact) in the wiring between the fuel pump relay (in the under-hood fuse/relay box) and the gas tank. It may have opened. I don't know where it is located, it may be behind a kick panel under the dash. You may have to ask someone where it is.

The fuel pump fuse is a 20amp fuse, also in the engine compartment fuse/relay box. This fuse and it's wire is the power feed for the fuel pump relay.

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First check there is battery voltage to the pump and the pump starts when the ignition is switched on , if not check fuse and relay, check wiring from relay to pump. If ok and the pump is working , check for fuel blockage from the tank inlet to the pump , some have a sock type filter in the tank pick up tube, if all ok remove the fuel filter , switch on and fuel should flow at the filter, fit a new filter, if still no fuel at the rail fit a fuel pressure gauge an check for low pressure , if ok, the fuel pressure regulator may be stuck causing a air lock replace it.

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1989 f-250 inertia fuel shut-off switch switch location


This should be in the owner's manual. I found the below on autozone.com, their repair help location:
An inertia switch is used as a safety device in the fuel system. The inertia switch is located in the cab, generally under the dashboard on the right side. It is designed to open the fuel pump power circuit in the event of a collision. The switch is reset by pushing each of 2 buttons on the switch simultaneously (some models use switches with only one reset button). The inertia switch should not be reset until the fuel system has been inspected for damage or leaks.
When the ignition switch is ON , it turns the EEC power relay ON . The EEC power relay provides power to the powertrain control module (PCM) and the control side of the fuel pump relay. Power for the fuel pump(s) 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 flows through the fuel pump relay and inertia switch to the fuel pump(s). The fuel pump relay is controlled by the PCM.
When the ignition switch is turned ON , the fuel pump(s) will operate. If the ignition switch is not turned to the START position the PCM will shut the fuel pump(s) OFF after 1 second. The PCM will operate the fuel pump(s) operate the fuel pump(s) when the ignition switch is turn to START position to provide fuel while cranking.
After the engine starts, the PCM will continue to operate the fuel pump(s) unless the engine stops, drops below 120 rpm or the inertia switch is tripped.

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2002 GMC Sonoma 2.2l 4cyl. I have been having intermittent fuel pump problems. I replaced the fuel pump and now the truck will not start. There is spark and there is flow at the filter, but it is very...


With the ignition key turned on without trying to start the engine you should hear the fuel pump run for a few seconds. That is how its primed to start. Upon starting the oil pressure reaches normal operations & the prime switch will cut off by the signal from the computer. Thus the engine still needs fuel to run so the computer switches on the fuel pump relay to provide the fuel to the engine. The prime switch is intergrated with the oil pressure switch. If you do not hear the fuel pump upon having the key on replace the oil pressure sensor

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3 Answers

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Check for 12 volts power at the fuel pump harness. If no power is going to the pump, check the fuel pump relay. Also, check the fuel pump inertia switch. Ford usually has it on either inside left or right rear trunk fenders.

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1 Answer

1997 Ford F150 Electric Fuel Pump will npt pump


Did you check the fuel inertia switch in the passenger side kick panel ?

The fuel pump is powered :
the fuse to the fuel pump relay.
The fuel pump relay to the fuel inertia switch
The fuel inertia switch to the fuel pump itself.

At the fuel inertia switch in the kick panel, power from the relay is the Dark Green w/ Yellow stripe wire and the pink w/ black stripe wire is the power. from the fuel inertia switch to the fuel pump.

If you jumper the fuel pump relay, you should hear it run. If not pull the fuel pump relay, and check the pins in the relay socket, pin 30 should be the power from the fuse.

50b0c31.jpg

If you have power at pin #30, jumper the relay socket as shown with the red line above, and check the dark green w/ yellow stripe wire at the fuel inertia switch for power.
Press the button on the top of the fuel inertia switch, and check for power leaving the fuel inertia switch on the pink w/ black stripe wire.

This is tests good, check for power at the fuel pump, same pink w/ black stripe wire.
Fuel inertia switch info is in the owners manual, If you did not get an owners manual with your truck ( purchased used ), you can download one from Ford :
https://www.fleet.ford.com/maintenance/owners_manuals/default.asp

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1 Answer

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Try checking the autoshutdown relay uner the hood in the fuse cluster. If you look there should be another relay with the same number on it try switching them see if it works. If it does start after switching relays you have a bad relay and replace it, if not its not the autoshutdown relay. There should be a fuse for it as well labeled fuel pump, check that as well.

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