Question about 2001 Ford Taurus

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2001 Ford Taurus replaced fuel pump and filter. Engine turns but no crank. Inertia switch was down.. Turn key and hear pump makes running sounds.... No crank. Popped switch out..turned key and no sounds of pump working. Confused is this a switch problem or what?

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  • Ford Master
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Could be a bad switch. Use a ohm meter to check each switch position. Use fuel pressure gauge to test for correct pressure. Use noid light to check for injector pulse. Check for ingnition spark.

Posted on Dec 10, 2014

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Posted on Jan 02, 2017

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SOURCE: 1985 Ford F-150 Truck (EFI) Fuel Problems

Same problem with my 85 F-150 5.0 EFI---turned out that the fuel pump relay under the hood was teriffically corroded on the inside (I opened up the relay to look inside). When I checked the voltage at the fuel pump it would show 3.5-6 volts instead of 12 volts.

I was thinking fuel blockage or perhaps failure of the in-tank pumps. Sometimes the truck would start and run, othertimes it would neither start nor run. Typically, if running it would stay running until turned off (where the relay had to break).

Changing the green fuel pump relay fixed the problem--12 volts now at the pump and no reoccurance.

Good luck--let me know if this fixed your F-150.

riippa@aol.com

Posted on Sep 22, 2009

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Check for fuel pressure. Commonly fuel pumps are changed when the inertial switch may have tripped. Google ford inertia switch. It is a resettable safety device for the fuel system.

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When you turn on the key to Run, do you hear anything? There is an Inertia cutoff switch which kills the power to the fuel pump. This switch is usually behind the front kick panels and has a reset button that you push. It is a safety switch and can sometimes trip if a doorslam or impact is felt by the sensor.

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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

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The sound you are describing is the fuel pump. When you first turn the key to the on position, the fuel pump pressurizes the system. This could be fix by replacing the fuel pump or even something more simple like a fuse to they fuel pump relay or the inertia switch that some vehicles are equipped with has tripped, which in this case, it's usually located in the trunk, behind the carpet, on the sides of the vehicle. It will have a small button that can be pushed back in. Hope this helps direct you in the right direction and good luck!

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