Question about 1997 Ford Mustang Cobra

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1997 mustang cobra fuel pump wont run

The car cranks but thr fuel pump wont run i jumpered the inertia switch changed out the constant control module i also hard wired the fuel pump so it does work but something is telling it not to i also checked the fuses

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  • yadayada
    yadayada May 11, 2010

    The pump works when jumpered or not, u are unclear?

  • Anonymous Mar 16, 2014

    something telling the fuel pump not to turn on changed the pump and still not running

  • Anonymous Mar 24, 2014

    Car starter is working as is the Battery. No power to the starter coils because the fuel pump and associated elements are working. I read somewhere that The Powertrain Control Module or the Integrated Control Module may be at fault. How can those be checked for problems? What is the purpose for each one?

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The relay could be bad, or a problem with the PATS.

Posted on Jan 25, 2009

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How to test fuel inertia cutoff switch....


Do you power coming out of the switch when connected? If you do maybe you fuel pump is bad.

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I have a 1996 mustang v6 no power to fuel pump. Bought used fuel pump relay still have np power. Safty switch is good. Unpluged fuel turned switch on and i have constant power of 9.52 volts plug in pump...


9.5 volts sounds like the power coming from the gas gauge.
I am showing a relay module with the fuel pump and pcm relays built in along with two other relays. The fuel pump relay should not be accessable. In most cases the pump relay gets power from a 20amp fuse and the computer grounds the relay when needed. Power goes from the pump relay to the inertia switch then to the pump. So the inertia switch should be hot when the pump relay is activated.

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How do i reset my 1999 mustang fuel pump?


Reset your fuel pump? If you mean the inertia switch, all you have to do is push the button on the inertia switch to reset it. It is located in the lower left rear corner of the trunk.

Please note that if your fuel pump is not working, it is NOT the inertia switch unless you have been involved in an accident, or slammed something (like a curb or a HUGE pothole) pretty hard recently. If this is what happened, the engine would have died IMMEDIATELY after such an accident.

Apr 30, 2012 | 1999 Ford Mustang Cobra

1 Answer

2000 ford mustang 3.8 no power at fuel pump fuse is good relay is good it does have a anti theft device, inertia is good


You have a fuel pu,p driver module that gets the power from the inertia switch and the power for the fuel pump comes from that module. I would start by checking for a wiring problem. Below is a picture of where that module is located. At the plug of the module you want to make sure you have good continuity from the pink and black wire at the module to the inertia switch. Then you will want to make sure you have continuity from the fuel pump to the module in the brown and pink wire. That should be the power source to the fuel pump. One other thing to keep in mind and that is the PCM controls ground to the fuel pump so this may be an issue. Try that first to see if you have a wiring problem. If you have power from the inertia to the module but no power coming out of it to the fuel pump this may be your problem. Hope I was able to help...

2_29_2012_9_12_02_pm.jpg

Feb 29, 2012 | 2000 Ford Mustang

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My 1998 ford mustang 3.8 had a failure of the ground wire at the battery. I installed a new end and tried to start the engine. The engine cranks but would not start. I parked it in this spot overnight so I...


You sure the ground wires all reconnected? Check for power at the inertia switch. If it has power,the pump may be bad. Power to the Inertia switch comes through the FP relay, from the fuse. The relay is in a box called the CCRM (constant control relay module) Power from the relay to the switch is Dark Green/ Yellow wire.lF that wire has no power in the crank mode, then I think the CCRM is bad. The CCRM is located behind the coolant reservoir on a bracket. The ground for the CCRM is right front of engine compartment G103, dont really have a picture to tell you where exactly to look. Thanks for the detailed story, a lot of people write " it wont run, whats wrong"

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1 Answer

What typically is needed to to be done if a 2001 supercrew has had air bags deployed and wont start after that. The switch in the right kicker panel for the fuel pump does not appear to have been tripped....


Good info on the PATS / theft light. Looks to be the PATS / HEC operation is functioning correctly

The Fuel inertia switch only cuts power to the fuel pump, so if tripped, the truck would have a crank no start issue. Do you have a crank no start, or no crank issue.

To reset, just press down on it. To check if the switch is tripped, check for power at the connector to the fuel inertia switch

Engine compartment fuse # 10 ( 20A ) to the fuel pump relay -> Dark Green w/ yellow stripe wire to the fuel inertia switch -> pink w/ black stripe wire to the fuel pump module.
Check the pink w/ black stripe wire to ground with a meter for power, with the key in the run position.

If you turn the key from off to run ( do not start ) you should hear the fuel pump cycle ( hum, then turn off ).

Could be an issue with the fuel pump relay ( my '01 had a crank no start at ~ 35K miles, bad fuel pump relay ). I proved this out ( after a stupid ID10T error in my diagnoses process ) by jumpering the normally open contacts in the fuel pump relay socket, and then installing the trailer tow reverse circuit relay into the fuel pump relay socket ( same full size Ford Relay ).

Jumpering the fuel pump relay in the relay socket ( remove relay and use jumper wire ), red line
sscullys_16.jpg

If you have a no crank issue, could be the DTR ( Digital Transmission Range ) sensor on the driver's side of the trans is out of alignment.

Check the start motor relay ( on the firewall on the passenger side ) for power on the Tan w/ Red stripe wire when the key is in the start position ( this is from the ignition switch through the DTR when in park or neutral to the starter motor relay ).

You can test another route, turn the key to the run position, and apply power to the Tan w/ Red stripe wire on the starter motor relay in the engine compartment on the firewall. BE CAREFUL, the motor should turn over, keep clear of moving parts.

Post back a comment to this problem with the results of the testing.

Thanks

Nov 03, 2010 | 2001 Ford F150 Styleside SuperCrew

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

2001 Mustang Cobra will not start


check your fuel pressure. also look in your owners manual for the fuel pump inertia switch sometimes they can trip by being kicked or bumped. it is designed to cut fuel off in case of accident.has a reset button usually located in trunk or rt side kick panel

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1 Answer

1997 cobra fuel pump no shuting off


if fuel pump stay running that one thing but it should not get the cylinder full of gas unless injector stay open if as soon you put the key on the injector open anf fill the cylinder that sound like our computer is shorted try another computer if its ok change the oil before you go the engine is full of gas hope it a fixya thanks pierre

Jul 31, 2008 | 1997 Ford Mustang Cobra

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