HELP! Diagnosing 2006 6.0 hard start when hot/ loss of power - Ford Powerstroke Diesel Forum
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Old 08-02-2014, 05:39 PM
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Unhappy HELP! Diagnosing 2006 6.0 hard start when hot/ loss of power

Hey guys I have just recently joined the powerstroke family and I'm trying to diagnose a problem so that I know what to replace. I'll start off by saying that I have a 2006 F250 with the 6.0 with about 132,000 miles. The truck a somewhat of a hard start just starting it up in the morning cold. When i drive to the store or what not and when I go back to start it up, it has a long start and I usually have to turn it over and let it crank and then stop and repeat the process a few times and sometimes it will start, some times i have to let it sit a little longer (if it sits for about an hour or so after driving for it to start right up). I also have noticed a delay in my throttle response it i put the pedal to the floor and my truck doesnt have the "get up" it should have. I know that I most likely have a bad egr cooler and/or valve because my coolant levels with drop if a get on the pedal and i blow white smoke (moderately) when i get on the pedal. I am doing an egr delete soon and putting in a high-flow oil cooler but I am trying to figure out whats going on so that i can go ahead and get the parts for whats broken so i can knock it out when i do the egr delete.


The only code my truck is throwing that i know of is an injector pressure regulator too low. High pressure oil leak? Low pressure oil pump? any ideas?

A mechanic i know did an air test on the icp and didnt hear anything but he didnt take the vavle covers off but he said the high pressure is there and he was leaning towards the low pressure end because my oil pressure gauge takes a long time to even show a reading on pressure and is slow to rise even after the truck starts up.
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Old 08-02-2014, 05:53 PM
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I am by no means a pro but sounds like a few issues. Your not driving the truck anymore I would hope. If your heads havent gone yet I imagine with the egr leaking its only a matter of time.

I think if your LPOP goes out then your HPOP isnt going to get the required oil to use to build pressure. However I think there is a code and possibly engine cutout associated with the LPOP not working properly. From what I understand (have not done it yet) but the air test can be kind of tricky to identify any oil leaks.

I would get some sort of gauge setup like a edge CS to monitor all the parameters (there are lots of others also). This will help alot in diagnosing issues.

Skip on the high flow oil cooler. I have one and deltas are normally what you would consider a stock one to have when its clogging up. They dont cool as efficiently. I dont have a problem with mine but when it goes I am going back to OEM cooler. Also stay away from the dorman coolers.

Thats just a start. Hopefully others will add more stuff.
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Old 08-02-2014, 06:05 PM
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Ya I plan on just parking it soon so that I dont have something like a head gasket blown or head lift. As far as the air test goes, I heard it is almost impossible to actually hear or find the high pressure oil leak unless you do the air test with the valve covers pulled. So the air test my buddy did do doesnt seem to be that creditable but he stated there was high pressure there. I wasnt sure is maybe it was the ipr or high pressure oil leak or what.

Now as far as not driving it at all, is it really bad to drive it with a the coolant being burned out the exhaust and stuff? obviously i know its symptoms of a bad egr but how quick will a head gasket go when it starts burning coolant out the exhaust?
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