Do I need a better/bigger fuel pump? - Ford Powerstroke Diesel Forum
6.0L Performance Parts Discussion What has or has not worked for you?

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Old 08-26-2011, 03:48 AM
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Do I need a better/bigger fuel pump?

Here's the short version to make a long story shorter. Bought an 04 F350 6.0H no with 70k miles, two injectors out, had them replaced. Truck ran well for a month, bought a Superchips programmer that previous owner had used on the same truck. Went on vacation and broke down 250 miles away from home. Replaced fuel pump on side of road cause we thought that was the problem, it wasn't. Towed it home, replaced clogged EGR and unplugged it. Truck ran for a couple days and kept dying, alt was bad and another injector went out. Had both replaced. Truck ran fine for a couple days and another injector went bad, replaced.

My question is this, after I installed the programmer it ran excellent. Then I replaced the fuel pump. Now if I really get on the throttle on the interstate, especially when I'm towing, the truck acts like its running out of fuel. Could the programmer really be telling the truck to use that much more fuel that the stock pump can't keep up?

I traded in a perfectly running 03 6.0 for this piece of junk and am almost ready to cut my losses and get rid of this truck. Any help would be appreciated.
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Old 08-26-2011, 05:28 AM
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Injectors failure could be several different issues.

Low fuel psi causes failure, this could range from a weak HFCM, clogged filters, air in system, or a weak fuel pressure regulator spring. My guess is, your fuel pressure spring is weak. Without a fuel psi gauge hooked up, you won't know what the psi is dropping to at WOT.

Weak batteries, alternator, and/or FICM can also destroy injectors. Here's how to test FICM.
http://www.swampsdiesel.com/content/faq/ficm.htm
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Old 08-26-2011, 10:50 AM
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Thanks, I'll check the FICM tonight, it has been in the back of my mind that it could also be going out.

I just changed the filters and that helped some, but it's still acting up.
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Old 08-26-2011, 11:15 AM
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Do you have the updated fuel pressure regulator spring?
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Old 08-26-2011, 02:54 PM
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I'm guessing no. I've had the truck for about three months. I talked to the guy that owned it before me and it sounds like he didn't do anything to the truck, including maintenance.

Is there anyway to check? Is it a different color spring? Where and how do I look?

Thanks
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Old 08-26-2011, 04:33 PM
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On this link, page 30, fuel regulator. The spring is behind the cover.
http://www.forddoctorsdts.com/articl...eTableBook.pdf

Without gauges/monitor or a diagnostic scan tool, you might be throwing parts at it and hoping for the best. You might want to read this, it's very important to have a monitor/gauge system. Have a look at this thread.
Things to consider about owning a 6.0L
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