Question about 1999 Dodge Durango

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Fuel pump went out installed new one but won't start

My fuel pump went out so we installed a new one but when we turned the key there was no buzzing sound indicating the pump was working.why?

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Check the wiring to the pump, check the fuse and then check for a relay.

Posted on Jan 01, 2015


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check ground wires on both sides of dash

Posted on Feb 12, 2011

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SOURCE: installed new fuel pump. pump turns on with key

Try changing the fuel filter, then VERIFY that there is fuel pressure or not, at the fuel rails. If you have pressure and engine still wont start, problem is elsewhere. Perhaps the system has air trapped in it still. Did you add at least 5 GALLONS of gas to the tank? Some tank baffles wont let one or two gallons reach the pump, unless the vehicle is moving.

If you do NOT have pressure at the rails, check the following:
Are the hoses from the tank connected correctly to the body lines?
Did you install the hose and clamps(if required) from the pump to the same line the old pump was connected to? You can disconnect the inlet side of the fuel filter, and then turn the key on for split second. If the pump is pumping fuel and connected inside the tank correctly it will spray a bit. You can put an empty water bottle over the end of the line, just tape or wire it on so it wont shoot off.
Was there a cap or plug left on the intake(bottom) of pump?

It could also be the new pump. I know you dont want to hear some of these things, but it happens.
You would not be the first person to get and install a bad pump. Fuel pumps, Ignition parts, and electrical parts, and most brake parts should be obtained at a dealership. Yes they cost more but, they work!

Posted on Aug 22, 2011

Testimonial: "thanks so much for your suggestions! found line to filter unhooked. Still need to put in the 5 gals of gas only put in two. hope the problem is solved"

  • 17970 Answers

SOURCE: won't start, has spark at plug, fuel pump

OBD II DTC P0113 - Intake Air Temperature Circuit High Input

This code means that the Powertrain Control Module (PCM) monitors the temperature of the air entering the engine. The PCM supplies a 5 volt reference voltage to the Intake Air Temperature (IAT) sensor. The IAT is a thermistor that varies resistance based on temperature. As the temperature increases, resistance decreases. Low temperature results in a high signal voltage. When the PCM sees a signal voltage higher than 5 volts, it sets this P0113 check engine light code.

There will likely be no symptoms other than illumination of the Malfunction Indicator Lamp (MIL - Check Engine Light / Service Engine Soon).

A code P0113 may mean that one or more of the following has happened:
Internally failed IAT sensor
Faulty connection at IAT sensor
Open in IAT ground circuit or signal circuit
Short to voltage in IAT signal circuit or reference circuit
IAT harness and/or wiring routed too close to high-voltage wiring (e.g. alternator, spark plug cables, etc.)
Faulty PCM (less likely but not impossible)

To solve it, first, if you have access to a scan tool, is there an IAT reading? If the IAT reading is logical then the problem is likely intermittent. If the reading is less than -30 degrees, unplug the connector. Install a jumper wire between the harness connector signal and ground circuits. The IAT temperature reading on the scan tool should be maxed out at the high end. For example it should be 280 degrees Farenheit or higher. If it is, the wiring is okay, and it may have been the connection. If it isn't install the jumper wire between the IAT signal circuit and the chassis ground.

If now the IAT reading on the scan tool is maxed out then check for an open in the IAT ground circuit. If you get no reading at all on the scan tool, it's likely that the sensor signal is open or the 5 volt reference is missing. Check using a DVOM (digital volt ohm meter) for a 5 volt reference. If it's there, then unplug the connector at the PCM and check for continuity on the IAT signal circuit between the PCM connector and the IAT connector.

Hope this helps; remember to rating this free answer and leave us a testimonial comments.

Posted on Oct 13, 2011

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