HAVE A FOR 5.4 L. I HAVE BEEN HAVING PROBLEMS WITH THIS THAT NO ONE CAN FIGURE OUT FOR SOME REASON. I HAVE NO ACCELARATION WHEN DRIVING. IT JUST REVS UP. I TOOK IT TO A LOCAL MACHANIC AND A FORDALERSHIP. THEY SAID CHANGE THE EGR VALVE SO
2003 Ford Expedition • 130,000 miles
Have a 2003 for expedition 5.4 L. I have been having problems with this that no one can figure out for some reason. I have no accelaration when driving. It just revs up. I took it to a local machanic and a fordalership. They said change the egr valve so I did that and the dpfe sensor. It still runs bad. I have two codes p0171 p0125 I have checked for vaccum leak. I changed my o2 sensor and mas air flow sensor. Now my check engine light is on and I drive it and the engine keeps running but all power falls off.
April 2, 2012.
April 2, 2012.
P0171-Check the injector pulses. Pull the catalytic converter and give a quick test drive. If you can, buy a pipe that will fit in place of the converter temporarily to test it. If the power comes back, replace the converter.
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