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I have a 2003 ford ranger 2.3 5 speed that will not start. Has low fuel pressure at the pump so I replaced it and still low pressure

Posted by on

2 Answers

Did you check voltage at the pump
or anywhere in the fuel circuit?

Did you check Amps in pump circuit?

Did you check the battery & alternator
output?

Posted on Dec 03, 2014

Testimonial: "Getting almost 12 volts on one side but the other only goes to just over 9 while cranking on the motor. I don't know exactly what the specs are for this particular vehicle"

  • gettoredneck Dec 03, 2014

    I know the battery and alternator are good but don't have tools to check voltage. Pump kicks on but very low pressure

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  • 279 Answers

Did you replace the "sock" pre-filter on the pump? This is the white plastic mesh screen which attaches to the inlet end of the pump. These clog up and prevent the pump from drawing fuel in. Did you change the fuel filter? It may be clogged.
Also, in the past 5 years, most aftermarket parts are made in China, which means they are JUNK. Lots of quality control problems with brand new aftermarket parts now.

Posted on Dec 03, 2014

  • gettoredneck Dec 03, 2014

    I replaced the whole unit and the relay. Filter is good also. I figure its electrical but don't really know where to start on that end

  • Charlie Dec 03, 2014

    As Teddy B mentioned earlier, make sure you have a good ground and battery voltage at the wires going into the pump. Another cause of low fuel pressure is a bad fuel pressure regulator.

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