Question about 2003 Ford F350 Super Duty DRW SuperCab
Glow plug relay should be on the front are rear of intake.you have a mechanical low pressure pump on the passenger side low near the front. or a electric low pressure pump on the starter side. your truck should have the low pressure electric pump. to check fuel pressure you disconnect the out let line to do a out put test.on the electric low pressure pump.put out let line in a container.crank engine for 20 to 30 sec.you should have a good flow of fuel no dribbles.if dribble replace low pressure electric pump.the mechanical low pressure pump out put test you disconnect fuel line from the fuel filter inlet line.disconnect wire at fuel injection pump electric shut off solenoid .place the fuel line in a container. crank engine for 20 sec. fuel flow looks good.pump is good .if dribbles.replace mechanical low pressure pump.to check glow plug relay you need a .diesel repair ford manual to show you where to put a test light to check the relay.WEAR SAFETY GLASSES WHEN WORKING ON DIESEL ENGINES.DONT DISCONNECT THE INJECTION PUMP LINES WHILE ENGINES IS RUNNING.THE FUEL PRESSURE IS SO HIGH SPRAY IN YOUR EYE CAN CAUSE BLINDNESS.GET IN SKIN OR SORE CAUSE BLOOD POISON. CAN ALSO CAUSE A FIRE BE VERY CAREFUL.
Posted on Apr 16, 2009
The high pressure pump is actually in the valey of the engine. You will need a 5000PSI Gauge and a special oring fitting to go into the top of the pump to check the pressure. It is much easier to get a scan tool and look at the ICP, why do you want to see this pressure? Also the glow plug relay is on the passanger side valve cover. It has two larger posts, one for voltage in from the batteries and one large post to the plugs, then two smaller wires.
Posted on Apr 16, 2009
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Posted on Jan 02, 2017
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