6.0 has intermittent starting
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6.0 has intermittent starting
My 6.0 has intermittent starting. Ford said all components are O.K. It was starting at the time. Went home and about 1/2 hour later, cranks - won't start. Two hours later, started right up - 4 times in a row. I have replaced the FICM, FICM harness, glow plug controller, PCM power relay. This problem has been going on for months. No codes in the PCM. Never had codes in the PCM even when it was missing with the bad FICM. When I go to start it, starting is like a crap shoot. I cannot take it anywhere with confidence. Any suggestions?
Tuned
Joined: Aug 2003
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My 6.0 has intermittent starting. Ford said all components are O.K. It was starting at the time. Went home and about 1/2 hour later, cranks - won't start. Two hours later, started right up - 4 times in a row. I have replaced the FICM, FICM harness, glow plug controller, PCM power relay. This problem has been going on for months. No codes in the PCM. Never had codes in the PCM even when it was missing with the bad FICM. When I go to start it, starting is like a crap shoot. I cannot take it anywhere with confidence. Any suggestions?
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I have 109K miles on it. No fuel in oil. Ford said the injectors are good. They drained the fuel and put new filters in it. i think they just wanted to find something. I think that when it is running, everything checks out. Is there any connections, relays I should check? Are there any sensors that when fail will make a no start. I runs until I turn the key off. Never just stops running.
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Joined: Sep 2011
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From: Minnesota
I had an 06 6.0 that did the same thing hot, once it cooled down it would start fine. You will have to excuse my bad memory but I think it was the high pressure oil rail that was leaking enough pressure while hot tha it wouldn't let the injectors fire, once the truck cooled off the oil becomes thick enough to fire the injectors then it will start.
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The truck was all warmed up when I took it to the Ford dealer. They checked the injectors and all were firing per specs. It ran fine until the evening - many starts. Then did not start. A while later it started. Next morning I drove it to Tahoe from Monerey. Two stops. Started fine. Got to Tahoe and parked in neighbor's driveway so I could plow mine. After I plowed my driveway with snow blower, I went to start it. Would not start. many tries. After 2-3 hours it started fine and I brought it to my driveway. Started it four times great.
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I replaced the head gaskets and installed new pipes and O-rings in Feb when I replaced the oil cooler, egr and egr valve. Would this account for the sporadic hot and cold no start?
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I was informed that it might be the ICP sensor. Where is this sensor? I was told to unplug the sensor when it does not start and see if it starts. I will try it tomarrow if I can find the sensor.
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Starting fine now!!!
The truck is now starting fine. When I got a "no start" condition, I unplugged the wires to the ICP sensor on the right valve cover next to the glow plug controller. I then started the truck and it started right up. This sensor tells the CPM the amount of fuel to inject based upon pressure. Without this hooked up, the CPM will use a default pressure in its calculations. With a faulty sensor, the injectors were not firing correctly.
Thank you for all your help in resolving this intermittent problem.
Thank you for all your help in resolving this intermittent problem.
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