03 Excursion Runs Bad Cold Fine When Hot - Ford Powerstroke Diesel Forum
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post #1 of 6 Old 07-13-2011, 10:57 AM Thread Starter
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03 Excursion Runs Bad Cold Fine When Hot

Just had ICP sensor replaced. No Change. Test say ICP pressure low. When I crank in the morning, it is sluggish and has a slight miss until it warms up. Once it warms up, runs fine. Keeps turning on "Check Engine Light" after about the third time it is started after I clear codes. Any ideas??? What is the "blue spring" thing I keep reading about?
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post #2 of 6 Old 07-13-2011, 07:04 PM
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Does it start up when it is hot? If no you have a high pressure oil leak or a problem with your ipr valve.
If not you could have a bad ficm, there are a few threads on how to check your ficm voltage, it is pretty easy.
From my stand point I would say check the ficm first even though you are getting an icp code as it is easier to check the voltage than pull your ipr valve. Ficm's will give a few different codes but usually tied to injectors but the rough running when cold makes me think ficm. An ipr valve takes some time to pull if you don't have an ipr socket, 1 3/8" with a cut out on the side, OTC makes them.
When is the last time you changed the oil?

Edit

When they changed the icp sensor did they do the pigtail too?

Also could you list the codes you are getting? What are you using to read your codes?

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post #3 of 6 Old 07-19-2011, 04:42 PM
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FICM is bad or it’s injector stiction. Time to test FICM and get some REV-X
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post #4 of 6 Old 08-06-2011, 09:36 AM
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You may want to try getting someone to put a scanner on it cold and buzz test your injectors and then let it get hot to do a load test. Or you can throw some Rev-X in it to see if it straightens up any. Two ways I can think of to narrow down your problem.

Since you had the ICP replaced, I would go with stiction. My wifes 03 EX did the same thing and found that 2 injectors would fail the buzz test and 3 failed a load test.

Put two bottles of Rev-X in with the next oil change and it cleared up 90% of the problem, but I ended up changing all the injectors last week and now it purrs like a kitten.
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post #5 of 6 Old 08-22-2011, 10:16 AM Thread Starter
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UPDATE !!!! Still Need Help !!!

Update: I do not have a scanner. Took it to a "reputable" shop and they did a full diagnosis. FICM is good. ICP setting "low circuit" code (CEL). Said the HPOP pressure and injector duty cycle was all good. He also got some codes for TPS at different stages. Mechanic seems to think that I could either have an IPR issue or possibly a TPS issue. If the IPR is Sticky, will the Rev-X help. Looking for help
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post #6 of 6 Old 08-23-2011, 08:59 AM
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My truck was having really rough starts and would barely run till was completely warm. Just added two bottles of Rev X yesterday and holy cow! This morning truck runs like a champ. Zero hesitation, idle is smooth and truck will actually accelerate. Not saying it will fix yours but it is a cheap thing to try!



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