Bad fuel pump

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Feb 29, 2012 | 08:39 PM

el_gringo

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Bad fuel pump

I have 5 injectors misfiring due to my bad fuel pump, and my 2500.00 $ ford warranty doesn't cover it, go figure. Why did that clogg my injectors?

Feb 29, 2012 | 08:42 PM

bismic

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what codes do you have?

can you read fuel pressure and FICM voltage?

how regularly do you change both fuel filters and what brand filters do you use?

Feb 29, 2012 | 08:50 PM

el_gringo

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Idk the codes I took it to the dealer and they did the diagnostic read. And they said the fuel pump was bad and was causing 5 injectors to misfire. I've always changed the filters regularly but never used motor craft, I buy them on eBay.

Feb 29, 2012 | 08:59 PM

bismic

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There are MANY cases where aftermarket filters do not properly remove the water, bypass from a leaking o-ring, or deform due to excessive pressure drop.

All of these can/will damage injectors.

Many 6.0L engines have low fuel pressure due to a weak regulator spring. Ford has an upgraded spring that corrects the issue. Fuel pressures under 45 psig is the #1 cause of injector failures.

A fuel pressure sending unit and gauge installation is highly recommended.

The HFCM's (fuel pumps) are not all that common of a failure part.

Feb 29, 2012 | 09:02 PM

bismic

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Many times multiple injector codes really means a bad FICM (fuel injection control module). Testing the FICM volts is a necessary thing to do from time-to-time IMO.

Feb 29, 2012 | 09:12 PM

el_gringo

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Ok I can test the FICM with a meter I suppose. Where can I get a fuel pressure sending unit?

Feb 29, 2012 | 09:20 PM

bismic

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google time. start w/ looking at the dieselmanor.com site or doing a search here on FTE.

lots of choices. you will first need a sending unit installed on the test port at the base of the secondary fuel filter. Then connect the sending unit to a gauge. Some people (me included) bought a hose that allows the sending unit to be located near the drivers side battery - where it is easier to get to (wiring, etc).