6.0 Hard start
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6.0 Hard start
Hi all. Got hard start issue with my 2004 6.0 f350. 125000 miles
Just tore into it and replaced:
Head bolts/ gaskets
Heads cleaned and checked at machine shop
New egr cooler / coolant filter kit from sinister
External oil cooler/ stand pipes and dummy plugs/ blue spring upgrade kit from bulletproof.com
new hpop from xtremediesel.com
8 injectors replaced
Got everything back together and finally got to idle. have cranked it at least 10 times and idles very nice. the problem is getting it cranked. I have to turn it over for 20-30 sec to get ti to fire up. So purchased a scangage2 today and checked ICP, ICV, FMP,SYC and IPR. All looks good except IPR. Its around 14%ish with key on then it is pulling 84%ish while cranking till it fires up. The thing I suspect is a HPOil system leak.
Question: Is there anything else that can cause this except a leak(haven't done the air test yet, waiting on adapter)?
Just tore into it and replaced:
Head bolts/ gaskets
Heads cleaned and checked at machine shop
New egr cooler / coolant filter kit from sinister
External oil cooler/ stand pipes and dummy plugs/ blue spring upgrade kit from bulletproof.com
new hpop from xtremediesel.com
8 injectors replaced
Got everything back together and finally got to idle. have cranked it at least 10 times and idles very nice. the problem is getting it cranked. I have to turn it over for 20-30 sec to get ti to fire up. So purchased a scangage2 today and checked ICP, ICV, FMP,SYC and IPR. All looks good except IPR. Its around 14%ish with key on then it is pulling 84%ish while cranking till it fires up. The thing I suspect is a HPOil system leak.
Question: Is there anything else that can cause this except a leak(haven't done the air test yet, waiting on adapter)?
Last edited by Donwan; Jun 8, 2018 at 09:27 PM. Reason: misspelled word
Posting Guru
Joined: Mar 2014
Posts: 1,468
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From: Salt Lake City, utah
How many miles do you have on the engine after the work was done? The HPO will have air still in the heads and the external,oil cooler etc. going to take some driving to get it out. Give it 50-100 miles then come back if you have problems.
Fleet Mechanic
Joined: Jan 2016
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Good point, I always had to take my 6.0 out on the highway and drive it like I stole it to bleed air from fuel system after a filter change. OP may want to do the same thing.
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Thanks. I’ll get it together and give it a go. Haven’t driven it at all yet. Do I need to monitor any specific thing on my scangauge while doing this?
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From: Salt Lake City, utah
You could watch the normals like ECT,EOT,FMP,FLP,IPR,ICP. Just don’t read to much into them until you get some miles then revisit the numbers. Put the batteries on a charge for a while just to keep the FICM happy.
EDIT: maybe also clear any codes that are stored so you start fresh. Take a snapshot of any that are there first.
EDIT: maybe also clear any codes that are stored so you start fresh. Take a snapshot of any that are there first.
Cross-Country
Joined: Feb 2018
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The 6.0 has a self-bleeding fuel system. With the miles I put on my '06, I change filters about monthly and I've never had issues. It is a return-style system, and all that's required to bleed the fuel system is switching the key on. The pump kicks on, pushes fuel into the lines and blows the air into the tank. You can certainly give it a shot, but air in your fuel lines isn't the problem
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