07-04-2009, 01:55 PM
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Senior Member
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Join Date: Oct 2005
Location: Michigan
Vehicle: 1998 Ford F150 4x4 5.4L
Posts: 14,932
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The biggest culprit is usually the MAF- It gets dirty. If your running a Oiled filter, that makes matters worse. Also you need to run Motorcraft plugs in the 02.
Cold air system, completely sealed air box with DRY element is best.
Don't forget to update your forward O2's and coils every so often.
My 98 runs great just with simple updating and maintenance.
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Windsor built 5.4L, E40D, Transgo kit, 9.75 Rear gear, Brembo rotors, Carquest blue's, Bilstein's, Ported & Polished Intake/TB, Pace setter LTH's, Magnaflow HFC's, Magnaflow 22X4 HF Mufler, Type 3 19lb Injectors, Volant Intake w/ Amsoil EEA191 Filter, 265/17 GY Fortera's.
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