WHY DO MY INJECTORS KEEP GOING BAD please help - Ford Powerstroke Diesel Forum
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Old 07-03-2011, 09:16 PM
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Unhappy WHY DO MY INJECTORS KEEP GOING BAD please help

I have a 03 F250 6.0. I had problems with a couple injectors about a year ago. So I replaced all of them. And within 6 months I have replaced 3 of them again. And now it is almost to quit again. Please help.
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Old 07-03-2011, 09:23 PM
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Send a message via Skype™ to 2003kingranch
watch this
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Old 07-03-2011, 09:25 PM
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Have you checked fuel pressure? Below 45psi will damage injectors.
If you never checked your fuel pressure, you may have fixed a symptom and not the underlying issue.
Ford has an updated fuel pressure regulator spring that will raise the fuel pressure into the neighborhood of 70psi.
3C3Z-9T517-AG is the part number
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Old 07-03-2011, 09:26 PM
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What oil are you running?

Here is three things that are necessary for healthy 6.0 injectors:

1) Verified and steady fuel pressure at 65 PSI (with the new updated spring). You will need a fuel pressure gauge to ensure this.

2) 5W-40 Full Synthetic Oil every 5,000 miles with a Motorcraft Filter. Two bottles of Rev-X in the first batch of synthetic will ensure even healthier injectors.

3) New Motorcraft Fuel Filters every 10k-15k.
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Old 07-03-2011, 09:30 PM
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Agreed, I'm going to say Fuel Pressure is the first thing to check.
Then ICR Press (via the Insight, maybe listed as something else on other units)?
Oil quality, and frequency of oil changes?
Frequency of filter changes?

You have a reason these things keep going bad, unless you're using cheap/defective replacements.
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Old 07-03-2011, 09:33 PM
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Thanks. So u think maybe fuel pump?
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Old 07-03-2011, 09:36 PM
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Nope, a simple $55.00 part that I referenced earlier.
You STILL need to check pressure, no matter what you do.
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Old 07-03-2011, 09:37 PM
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I use rotella. And change every 5k. 177k miles on it also added a egr delete to it
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Old 07-03-2011, 09:38 PM
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Low pressure (under 45psi) causes the injectors to not cycle correctly and cause damage. This could be the fuel pump, but it could be something as simple as the Fuel Pressure Regulator Spring (updated blue spring from Ford), or the filters themselves being clogged. You'll want to get a measurement of your Fuel Pressure, before you start throwing parts into the truck.
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Old 07-03-2011, 09:40 PM
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Do I get that part from Ford?
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