Why do my injectors keep failing? - Ford Powerstroke Diesel Forum
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Old 01-04-2013, 08:02 PM
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Why do my injectors keep failing?

The truck is at the dealership right now waiting to get checked in-depth.

My back story is...I've replaced 5 injectors 1,3,5,7,6 then had one of the new ones fail so # 6 was replaced again. I let the dealership replace it. Now two more are not contributing according to there scanner 1 and 2.

What gives? The fICM was repaired by FICMrepair.com less then 6 months ago, all injectors mentioned have been replaced within 6 months. I have new filters and water separators on the airdog within 3 months. The turbo was just rebuilt a month ago. Coolant flushed within 7 months, new radiator within 7 months.

My fuel pressure was checked a couple of months ago at 48 psi, (dont know what it will be until monday when the dealer looks at it.)

Its studded, deleted, and builtproofed.

O yea - the only thing I can think of, the oil has not been changed for 10 months but I am running synthetic and have less then 3000 miles on it.

Everytime I let the truck sit for 2 weeks or so while I drive my Jeep something goes wrong!!!

Any ideas?
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Old 01-04-2013, 08:04 PM
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How many miles on truck?
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Old 01-04-2013, 08:21 PM
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2006 with 150,000

block is good, cylinder pressure checked clear when dealership did # 6
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Last edited by Blown03HD; 01-04-2013 at 08:37 PM.
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Old 01-04-2013, 08:37 PM
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Maybe you're getting contaminated fuel in your local fuel station. (Just a guess!). Instead to get your oil analyzed, try to analyze your current fuel in your tank. As I said it's just a guess.

Last edited by ruizhernandeztrust; 01-04-2013 at 09:31 PM.
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Old 01-04-2013, 09:02 PM
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has the dealer checked the wiring harness from the ficm to the injectors? sometimes wires will ohm out ok but as soon as you put a load on they fail. i highly doubt your injectors are failing that much...that fuel pressure is almost at the low point also, maybe you should do the blue spring upgrade..also double check the connections at the ficm plug in, un plug several times on each connector to break any corrosion free.
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Old 01-04-2013, 09:22 PM
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i believe i have the blue spring.
the aiedog is adjustable so we can up it if needed.
the ficm has a new connector since the last one got fried thats why i needed the ficm repaired.
it could be the fuel but the airdog filters filter better than stock ones.

im getting sick of this truck.
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Old 01-04-2013, 09:48 PM
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How's the charging system health? Batteries, alternator(s)? Also might want to double check your FICM. I have heard of a few of the repairs lately that haven't been holding up and have been done recently as in within the last 6 months and are starting to fail.
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Old 01-04-2013, 10:10 PM
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48 psi fuel sounds low. Is that pressure at idle? In winter I see 65 @ idle and 61 in summer at idle.

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Old 01-04-2013, 10:13 PM
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cts says 47-48 volts at all times
Alt was when i did the radiator and put a new battery in it.

I was told by the dealer when I learned the 5 injectors were over or under contributing that my alt, battery, FICM were all bad so I fixed everything.

I monitor FICM volts, EGT's, EOT, ECT and battery volts at all times

Maybe it was 64 or 68 psi, I cannot remember now what the exact fuel pressure was
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Old 01-04-2013, 10:30 PM
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Fuel pressure seems low. Low fuel pressure will kill injectors. Need you need to monitor to see where its at in all driving conditions. 55-60 is where it should be. How long have you had the problems while running the Air dog. Can u put the factory pump back on?

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