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I HAVE A VOTAGE METER BUT THER IS NO POWER IN THER FUEL PUMP TO GET A READING

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A voltmeter measures voltage, so if your meter says there's no voltage, there's no power in the circuit at that point. Check your fuel pump fuse and electrical connection at the pump.

Posted on Feb 08, 2010

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What tools specifically will I need to replace the fuel pump on a 1995 ford Taurus ,sockets ect also is there a way to troubleshoot to be sure it's the fuel pump that is bad?


Yes, there is! And without taking the fuel pump out. You can disconnect the power feed from the fuel pump at the tank, and connect a power source (such as a separate battery), to it, but route that power source through a current meter. If the current meter shows normal current draw, take note of the current reading, drain the fuel tank, and take a second current reading, which should be much lower because the pump is only pumping air! By the way, you can ALSO disconnect the fuel line and let that pump push the fuel out of the tank, and into a holding tank. That will also give you an idea whether a fuel filter may be clogged or clogging up! If the pump does not run at all from the alternate power source, you have found your problem!

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95 astro has no spark to the coil what next


Try this tips:
1. Check the battery voltage at the battery with the digital volt/ohm meter. Set the meter to "Volts D/C" and touch the black meter lead to the negative battery post and the red meter lead to the positive post. A fully charged battery will measure 12.7 volts or more. A measurement of 12.5 volts is considered discharged, and the battery should be charged before any further testing. Any measurement below 11 volts indicates a severely discharged battery--the battery is most likely damaged and should be replaced. If the battery measures above 12.7 volts, proceed to the next step.

2. Check the starter for battery voltage by touching the red (positive) meter lead to the battery cable terminal on the back of the starter and the black (negative) lead to the chassis. The voltage reading should be approximately the same as the measurement at the battery. If the reading is lower than battery voltage, check for bad connections at the cables on the battery and the starter or ground cable.

Check for ignition switch signal at the purple wire on the back of the starter. When the key is turned to the "Start" position this wire should measure battery voltage. If the reading is less than battery voltage, or zero volts, check the fusible links (orange wires) on the back of the starter. If the fusible links are intact and not burned or broken, replace the ignition switch. If battery voltage is present at the purple wire, and the starter doesn't turn, replace the starter. If the voltage measurements at the starter are correct, and the starter cranks the engine over when the key is turned to the start position, proceed to the next step.

3. Remove the air duct attached to the throttle body, and spray a liberal amount of the carburetor spray into the throttle body. Replace the hose, and try to start the engine. If the engine starts, the fuel pump is not supplying fuel or the ignition module is not pulsing the injectors. Check the fuel pump fuse located in the under-hood fuse block. If it is good, check for power at the fuel pump electrical connector located near the rear of the fuel tank on the driver's side of the van. In the Chevy Astro van, power is supplied to the fuel pump by the the gray wire on the electrical connector when the engine is being cranked. If power is supplied, hitting the fuel tank with the flat side of a hammer while someone else is turning the ignition key to start will sometimes bump the fuel pump enough to allow it to start. If the fuel pump checks good, proceed to the next step.

4. Check for spark. Disconnect the coil wire at the ignition coil, and try to start the engine. If no spark occurs, replace the coil and ignition module. If a strong spark occurs, plug the wire back in, and remove a spark plug wire from a spark plug and repeat the test. If a spark is not present, replace the spark plug wires, and distributor cap and rotor.


Keep us updated.

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1 Answer

I cannot get power to fuel pump on my 94 mustang gt...car died sudden while driving and the fuel pump will not cut on..only testing votage at 1.90volts when keys is turned on..i tested fuel pump..its runs...


When you turn the key on it will only energize the fuel pump relay for two seconds , or until you crank the engine over . The PCM - engine computer controls the fuel pump relay . Watch this video
Fuel Pump Electrical Circuits Description and Operation

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1 Answer

Car runs great but on a cold start it has a rough idle like a bad plug or fuel filter replaced both after car is warn will start fine every time


has the engine coolant temperature sensor been checked to see that it has the correct ouput votage at the chart temps, if it is out of spec the engine can run lean and this would cause cold start issues, also what is the fuel pressure reading when key is shut off, does it drop rapidly? should never loose more than 5 PSI, if it does the fuel pump is defective, also a fuel filter will not cause hard start or rough idle, only overall loose of power, does it have that at anytime?

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You will need to drain fuel tank and drop it down t from tank. Remove the fuel pump and check the fuel pump sending unit. Using an ohm meter, connect the ohm meter connecters to the fuel level sending unit. Carefully lift up the float and the ohm reading should be approximately 8 ohms. Then let the float all the way down and the reading should be approximately 100 ohms. If not replace the fuel pump assembly. Hope this will help you.

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check battery votage at fuel pump while cranking if not replaced main relay locate at left kick panel

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Power from the relay comes from the ignition switch. If you don't have power at the relay then its likely the switch.

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1991 pontiac 2.5 tech 4 fuel pump relay wont energize


Look for a bad fuse or relay. If both check out, most likely an ECM problem

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940 1991 volvo estate


Your problem is fuel gauge is hanging up on the fuel pump. The slide bar/fuel sender is located inside the fuel tank alongside the fuel pump. Today I removed my fuel tank and replaced the pick up strainer on my fuel pump and previously my fuel gauge didn't work, but all I needed to do was slightly bend the slide mechanism and my fuel reading read correctly on my gauge. Previous to that I showed no reading on the dash meter.

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