Torqued_Up Posted March 5, 2005 Share Posted March 5, 2005 In the last year I have seen quite a few 5.4L trucks with low power and codes P0171 and P0174. All of them except one had bad fuel pumps. I know that there was a TSB or SSM back a couple of years about the pick up screen being too fine and clogging. A lot of these trucks also had water problems with custom bodies that had the wrong sized fuel filler vent hoses. Water and dirt would whip up from the rear tire and enter the tank at the loose hose near the filler cap. Quote Link to comment Share on other sites More sharing options...
Torqued_Up Posted May 15, 2005 Author Share Posted May 15, 2005 PCV tubes rotting out and splitting too. They seem to rot at the throttle body connection and make a lot of noise so they are easy to identify quickly. Quote Link to comment Share on other sites More sharing options...
sajeev Posted September 19, 2005 Share Posted September 19, 2005 check the maf sensor filament,it may be contaminated,clean the hot wire with carb cleaner and road test,i have encountered with atleast 10 of such cases sajeev bahrain ford tech Quote Link to comment Share on other sites More sharing options...
sixturbosix Posted September 22, 2005 Share Posted September 22, 2005 how about tsb 05-13-04.Just ran across this my not be what you are looking for but contains these two codes. Quote Link to comment Share on other sites More sharing options...
Matt Posted January 17, 2008 Share Posted January 17, 2008 Biggest thing i've found is a cracked pcv hose at the back of the intake. I've only done i think one fuel pump Quote Link to comment Share on other sites More sharing options...
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