Question about 2003 Ford F250 Super Duty Crew Cab
Installed K&N air box.installed new fuel pressure regulator. New ring in tubo. Still coughs when under load. Ford says its the fiter system. K&N thinks not. Help?
I would suggest first checking the seal on the air box and all connections to your intake. Make sure there are no penetrations where air could leak. As you probably know, the 6.0 has a world of problems, but I cannot tell you if this is related to the engine or not.
Posted on Mar 25, 2014
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Posted on Jan 02, 2017
if you have the 6.0 then the filters are located on top on the motor right beside your oil filter and under the drivers side on the fuel pump, check to see if you have diesel in your bowl where the fuel filter is, no diesel in there your fuel pump might be dead, check fuses to fuel pump and check relay on the passengers side kicker panel, check your owners manual
Posted on Dec 02, 2009
there is an additive at most auto parts stores and even some gas stations, i forget the name but if you read the bottle it will say something about removing water from the fuel system, they are generally located next to the "octane booster" or "fuel system cleaners"
Posted on Aug 09, 2009
SOURCE: 98 FORD ESCORT ZX2
1998 ford escort sport engine started making a tapping noise and engine light started flashing. Had oil and water at normal level.
Car has 110,000 miles. Been serviced regularly!
Posted on Mar 30, 2011
SOURCE: 1991 Ford truck 150 300
CLEAN FUEL INJECTORS AND CHECK FOR INTAKE MANIFOLD LEAKS.PCV VALVE AND EGR VALVE COULD BE LEAKING STICKING OPEN.CHECK ALL VACUUM HOSES FOR VACUUM LEAKS.OLD VACUUM HOSES WHICH IS CRACKED OR BROKEN WILL CAUSE VACUUM LEAKS AND ROUGH IDLING.IF ALL IS GOOD DO A COMPRESSION TEST CHECK FOR LOW COMPRESSION.WORN VALVES WILL CAUSE ROUGH IDLING.
Posted on Aug 28, 2011
Tips for a great answer:
Fuel Pressure Regulator is located on the fuel rail.
1. Disconnect the negative battery cable.
2. Properly relieve the fuel system pressure.
3. Remove the air cleaner outlet tube(s).
4. Remove any necessary components to access the pressure regulator.
5. Disconnect the vacuum hose from the pressure regulator.
6. Remove the pressure regulator attaching screws.
7. Remove the pressure regulator from the fuel rail.
8. Discard the O-rings on the pressure regulator and replace them with new ones.
9. Lubricate the O-rings with clean engine oil.
10. Install the regulator into the fuel rail and tighten the retaining screws.
11. Connect the vacuum hose to the regulator.
12. Install any components removed to access the regulator.
13. Install the air cleaner outlet tube(s).
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Fig. Fig. 6: Replace the old fuel filter/pressure regulator mounting gasket
Fig. Fig. 7: Check the condition of the fuel filter/pressure regulator O-rings
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