The reason your truck starts with it unplugged is that the pcm defaults to a pre-determined pressure to fire the rig up when it doesn;t sense the ICP. When you plug it in the pcm is calling for the 550 and up psi to fire it off but the ICP sensor won't allow it.

What happens if I unplug my ICP sensor?

If you unplug the ICP sensor while the truck is running, and nothing changes at all, then your sensor is bad. If the sensor was good and functioning, you should hear a change in the idle because the PCM will bump up ICP.

Does an ICP sensor cause no start?

Injector Control Pressure Sensor: When an ICP is failing, the engine runs extremely rough as load is imposed (under throttle), and the condition can eventually contribute to a 7.3L's inability to start. ... If the engine runs smoothly with the connector unplugged, the ICP is bad.

How much ICP does a 6.0 Powerstroke require to start?

Verify ICP & IPR valve function - A minimum 500 psi injector control pressure is necessary to start the 6.0L Power Stroke diesel. If oil pressure does not reach or drops below 500 psi an injector will not fire. ICP typically reaches anywhere between 800 and 2,000 psi while cranking.

How do I know if my 6.0 ICP sensor is bad?

Symptoms of a Bad or Failing Injector Control Pressure Sensor

1. Starting issues. One of the first symptoms of a possible issue with the injector control pressure sensor is issues starting the engine. ...
2. Engine misfires and decrease in power, acceleration, and fuel economy. ...
3. Check Engine Light comes on.

6.0 Startup with ICP unplugged

36 related questions found

Will a bad ICP throw a code?

well,I just did an egr delete and a blue spring on my 04 f550 6.0 and all went well.,the icp will toss a code if you unplug it or unbolt it.,not just if it is bad,maybe test the ficm,and fuel pressure so you can eliminate them from the scenario.

How do you know when IPR valve is bad?

A key indicator of a bad IPR valve is low injection pressure. Symptoms of a bad 7.3 Powerstroke IPR can range from running very rough to a no start situation. The symptoms can sometimes feel like you have multiple bad injectors, among other things. You can easily and inexpensively resolve this problem.

What should ICP be at idle?

At warm idle you should be 600-650 icp and 8-10% Ipr. The Ipr % can be higher when cold.

What does a 6.0 Powerstroke need to start?

1 on page 38 shows a simple oil flow schematic for the 6.0L diesel engine. In order for the fuel injectors to operate, a minimum of 500 psi oil pressure is required for start-up. The high-pressure oil pump can deliver up to 3600 psi, but only if the low-pressure oil system delivers the oil to the high-pressure pump.

What should my ICP pressure be?

Normal readings at idle for a warm engine are 400-550 psi .

Will a 7.3 Powerstroke run with ICP unplugged?

yes you can run the 7.3L w/o the ICP sensor plugged in... though you'll be staring at the SES/CELight constantly... The PCM 'looks' at the ICP sensor to calculate fueling & injection timing...the PCM also uses the ICP signal to better control the IPR valve.

What does the ICP sensor do on a 6.0 Powerstroke?

6.0L Powerstroke ICP Sensor

It senses the pressure in the high-pressure oil system and reports back to the engine computer which in turn adjusts the IPR valve position to achieve the desired pressure for a particular desired engine speed and load.

What should fuel pressure be on a 6.0 Powerstroke?

Maintaining fuel pressure in a 6.0L Power Stroke diesel is as important to injector life as it is driveability. Fuel pressure must maintain or exceed 45 psi at all times, including under wide open throttle (WOT). The fuel filter housing on all 6.0L engines has a test port that is plugged from the factory.

Can you clean ICP sensor?

Cleaning the ICP sensor won't do any good. The oil is coming from inside and leaking thru the terminal alongside the pins. If you mean the wiring harness plug, a little solvent to clean shouldn't hurt, but don't overdo it so as to soften the wiring insulation. Once the wiring is shot, you're looking at a new pigtail.

Where is the ICP sensor on a 2003 6.0 Powerstroke?

03-blue-Powerstroke

On an 03 its on the back of the motor on the driver side and 2004 to 2007 its on the passenger side by the valve cover.

Is it OK to let a 6.0 Powerstroke Idle?

Idling for a while shouldn't be a problem, as long as afterwards you run it up to WOT a bit to clean it out, excercise the VGT Vanes, and burn off the gunk with some nice high EGT's. Idling for 30 minutes, followed by just shutting it off, IS bad. Gotta clean out all that gunk before shutting it down.

What powerstroke to avoid?

Stay away from the 6.0's(commonly known as 6-leakers) and the 6.4's(commonly known as sootbags). I believe that the 2002/2003 7.3 powerstroke is one of the best diesels ever made, even with the tranny situation. After that, the 1997 PS was also a good one for longivity and reasonable power.

Will a 6.0 diesel run with no oil pressure?

You have to have a certain amount of oil pressure/oil flow to the HPOP to run the engine. If you are really running no oil pressure the injectors would not fire and the engine would not start. This is one of the good things about the 6.0 and 7.3 is you can't run them dry...

What is a good ICP reading?

ICP is normally 7–15 mm Hg; at 20–25 mm Hg, the upper limit of normal, treatment to reduce ICP may be needed.

What is ICP on a diesel?

The ICP sensor or Injection control pressure sensor is found on Ford's Powerstroke 7.3 L diesel engines. The ICP sensor is responsible for monitoring oil pressure being passed on to the PCM to pressurized fuel injectors using the IPR (Injection Pressure Regulator) for proper vehicle operation.

What is IPR duty cycle?

This is the Duty Cycle - A Duty Cycle is a time per division of an electrical waveform, a "Signal" to or from the PCM. Also known as I/O on a Bus. In this instance, the cycle of operation of a the IPR operating intermittently rather than continuously.

What is IPR on diesel engine?

Page 1. Injection Pressure Regulator (IPR) General Information: A Powerstroke engine utilizes an electromagnetic valve to regulate the high pressure oil pressure on the engine to tailor the injection characteristics of the injectors. This valve is called the Injection Pressure Regulator or IPR.

Where is the ICP sensor?

The ICP sensor is located on the driver side cylinder head towards the front of the engine near the high pressure oil pump. Remove the electrical connector from the ICP sensor by relieving the retaining clip and pulling upwards away from the sensor.