Question about 2001 Kia Sportage

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No electrical signal to the fuel pump. Could it be the relay?

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Check all of your fuses and relay first and still nothing then its your fuel pump is gone give these websites a try and if all fails stop by your local library and get your hands on a Haynes auto repair manual for your car wish you the best of luck Michigan Man.

Posted on Sep 03, 2010


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Posted on Jan 02, 2017


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No start. no fuel. no spark.89 2.9 ranger 1989 FORD RANGER 2.9L

Any electrical component, I want to check wiring circuits before I replace component. If problem with wiring circuit, replacing the component won't fix anything.
The pip signal is the rpm signal, at the three terminals, voltage--ground--signal. The computer has to see this signal. In the diagram, pay attention to terminals only. There are ford people here, who may be able to help you more than I can?

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Electrical prblem

There would be a fuel pump fuse, either under dash or under hood. Check that fuse, use the test light to see if fuse has power. If not, then it might be a fusible link or maxi-fuse that feeds the fuse panel. If fuse has power with key on, pull the relay, and use the test light and probe relay terminals, key off. One terminal should be hot at all times. If not, check for power loss between battery and relay terminal-possibly a maxi-fuse or fuse link.
If relay does have power to terminal, quickly check other terminals while someone turns key to on-for about 2 seconds, another terminal should show power-this would be signal from computer to turn the relay on to prime the lines and fuel rail. If you have that, plug relay in and cycle key. Does relay click? If yes, relay is working and problem may be at fuel pump connector. If relay is not working, but you have power to it, and the short signal from computer is there, then check the relay's coil side ground. Computer signals the coil side and the signal goes to ground from relay coil side.
Pull the relay and use a jumper wire from relay's hot terminal to fuel pump terminal-the wire to pump from the relay. If pump comes on, the problem is right there at the relay-either no signal from computer or the relay coil's ground is lost. If pump does not come on, again check connector at pump-that or the wire to pump[ has a problem.

May 12, 2013 | 2001 GMC Savana

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Installing an elec. fuel pump

Normally you would use a relay, and have something that is controlled by the key switch signal the relay to turn on.

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1999 Ford Explorer Sport Starting Issue

It sounds like the pump is failing. That or sometimes not getting electricity. To check which it is, you could use a voltmeter or test light at the gas tank's electrical plug in. You need to check for power on the fuel pump wire when the engine is being cranked for starting. Do this when turning the key to on does not cause the pump to turn on for 2 seconds as it should. The fuel pump has power for those 2 seconds when key is turned to on, and again has power when the engine is cranked. You might miss the two second signal, so check for power when car won't start-when pump won't turn on-and with the engine cranking. If you have a signal then and still no pump coming on, then you must have a failing pump.
But if you have NO power to fuel pump wire with engine cranking, then it is a problem elsewhere-probably the pump relay (try a new relay if you haven't already). That relay is signaled by the engine computer when key is turned to on or when engine cranks . so you could do some testing at the relay if needed.

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87 nissan z24 fuel pump not running

The power to the pump comes through the relay.
To verify the pump circuit is working right, and that the fuel pump needs replacing, do the following test: You will need a voltmeter or test light, and a helper. The pump wire at the tank is a white wire with, it appears, a blue stripe.
This may have been the wire you saw a brief signal on. In fact, it should have a 2 second signal when key is first turned to on-this is to prime the lines and system for starting.
There should be a steady signal on this wire when the engine is being cranked over. The relay should turn the pump on full time during cranking and running. So have a helper crank the engine over while you check for power on the wire. If there is power then, the pump circuit is working right and you probably have a failed fuel pump motor. The only other possibility is a bad ground wire for the pump-which you probably should also check.
You are right about the relay having two hot wires or terminals with key on, so that much is correct. The ecu turns the relay on when it grounds the coil side of the relay.

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Cant locate or reset fuel pump relay on 89 oldsmobile 88... ran it out of gas- any solutions?

Ok. First you can't "turn on" a relay. It is either working or it isn't. "several electrical accessories in the vehicle use relays to transmit the electrical signal to the component. If the relay is defective. that component will not function properly." ( Haynes Repair Manual, General Motors 1988-2002, p12-5) Your fuel pump relay should be located under the hood in the fuse box on the right (passenger side) of the car. It is a black square approximately 1" by 1". Replace it if your fuel pump isn't working as a cheap method of elimination.

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The fuel pump relay is in the engine compartment fuse block at location K4/C-1051.

Jan 09, 2010 | 2004 Ford Freestar

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Both fuel pump relays run hot. I have replaced both of them. The truck started and ran for about 30 minutes then quit. I replaced the relays and it ran for a few minutes and quit again.

You could have a bad fuel pump relay switch. The fuel pumpmag-glass_10x10.gif relay switch gets the fuel pump running in the vehicle during the start cycle. The terms fuel pump relay and fuel pump relay switch are used interchangeably. The fuel pump relay begins its job when the automobile operator turns to the ignition on, but before the motor is actually running. At that point, the fuel pump relay in some cars sends a signal to the ignition switch, which in turn sends a signal to the fuel pump to turn on. Others fuel pump relays have actual circuitry inside of them that receive the ignition signal and directly signal the fuel pump to engage.

Have a great day!

Sep 05, 2009 | Ford F-350 Cars & Trucks

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