sadavis Posted September 30, 2016 Share Posted September 30, 2016 Fuel filter was replaced on our 2007 Ford Expedition XLT 5.4l engine 180,000 miles. Now we get steady service engine light, mash the accelerator and the engine RPM will barley get to 3000 rpm, car runs ok once speed is obtained but when you mash accelerator the engine is very rough. per Advance auto engine code is cylinder one issue. any idea please Quote Link to comment Share on other sites More sharing options...
Pioneer Posted September 30, 2016 Share Posted September 30, 2016 Sounds like a bad coil. Quote Link to comment Share on other sites More sharing options...
1999 White C5 Coupe Posted October 4, 2016 Share Posted October 4, 2016 Fuel filter was replaced on our 2007 Ford Expedition XLT 5.4l engine 180,000 miles. Now we get steady service engine light, mash the accelerator and the engine RPM will barley get to 3000 rpm, car runs ok once speed is obtained but when you mash accelerator the engine is very rough. per Advance auto engine code is cylinder one issue. any idea please Did you use a genuine Motorcraft fuel filter or an aftermarket one? Any other work done? Why did you change the fuel filter? Quote Link to comment Share on other sites More sharing options...
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