Unconvention diagnostic methods, Chugging 7.3. - Ford Powerstroke Diesel Forum
 
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post #1 of 5 Old 11-07-2012, 04:19 AM Thread Starter
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Unconvention diagnostic methods, Chugging 7.3.

I have a 2001 F250 with a 7.3. It has over 200K miles on it, I just bought it this spring so I know nothing about the injectors.

When If first starts after sitting overnight it will rev up and down a couple times and then quit, after the second attempt it will start and keep running. But it has puffs of white smoke coming out of the exhaust until it's warm.

Now here is the reason for my Thread Title....... If I put my hand in front of the exhaust after it starts (white smoke still present) I can feel an inconsistent pulse, like I have a cylinder that isn't doing its job, do you know what I mean or do I sound like a moron. I checked the glow plugs and they all work. I'm thinking I have an injector going bad, I want to be sure, don't want to spend a day and 2000 dollars on a whim.

Also, where can I buy and what brands can I trust?
Should I find out what cylinder is bad and just do one, or do you do all at the same time?
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post #2 of 5 Old 11-09-2012, 08:55 AM
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It could also be your under valve cover harness, if that goes bad it doesn't send power to your injectors which won't allow them to work. But I would say in your case its probably bad injectors. Have a cylinder contribution test done, and you can find out which injectors are bad. You can just replace the bad injectors which is not the recommended way, if you can afford it replace all 8. You'll be much better off!

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post #3 of 5 Old 11-09-2012, 09:12 AM
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ICP or IPR possibly. What oil and how many miles on it?

I made my Samsung SGH-I997 send this.



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post #4 of 5 Old 11-09-2012, 09:47 AM Thread Starter
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I had a cylinder contribution test done, it came up with cylinder 8 as a fault, but the mechanic told me that number 8 always has that fault because of the long lead injector. Maybe I'll have it retested.

I run rotella 15-40 It only has like 1000 miles on it at most. I did notice that the oil level is a little high. But it doesn't look contaminated, at least not with coolant. what would it look like if fuel were leaking into the oil? or isn't that even possible?
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post #5 of 5 Old 11-09-2012, 10:23 AM
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it would stink like diesel and be significantly thinner.
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