What causes bad fuel injectors?

[usmcknight69]

I have a 2005 F250 6.0l with 70,000 miles. This truck has been a gem. Never had any problems with it. I recently did a coolant flush, and within a matter of a day or two, the truck started running rough. Mainly on start-up. P0275 on my Edge CTS. Dropped truck off at Ford and was advised the #5&7 injectors are bad. What would cause two injectors to go bad at the same time? I add DieselKleen every other tank, sometimes every tank.

[PGreenSVT]

Well where to start. How many miles on the injectors? Are you using 5w40 synthetic motor oil? are you using Motorcraft/Racor/Fram oil filters? How often are you changing fuel filters? Using Motorcraft filters? How is the FICM? ab bad FICM will kill injectors. Bad batteries or alternator will kill the FICM. How is your fuel pressure? Low fuel pressure will kill injectors.

[usmcknight69]

Originally Posted by PGreenSVT

Well where to start. How many miles on the injectors? Are you using 5w40 synthetic motor oil? are you using Motorcraft/Racor/Fram oil filters? How often are you changing fuel filters? Using Motorcraft filters? How is the FICM? ab bad FICM will kill injectors. Bad batteries or alternator will kill the FICM. How is your fuel pressure? Low fuel pressure will kill injectors.

I bought truck used, so i would assume they are original injectors. I use 5W40 Shell Rotella synthetic oil. I always use motor craft filters and change the oil between 5000-7500. I change the fuel filters every time i change the oil and use motor craft. FICM reads 47.5-48 per my EDGE CTS. I recently changed to the blue spring and fuel pressure is about 64psi.

[RRF985]

By the time you added the blue spring it was too late. I had a similar experience with my truck. Bought it with 70k and about 6 months later I had to have 4 injectors replaced. You should be fine now with the blue spring and hopefully you won't have any other injectors go bad.

[PGreenSVT]

Don't need to change fuel filters at every oil change. Every other change is fine. Recommended change interval is 15k miles. Sounds like you are doing the right stuff. This happens with a used vehicle sometimes. You don't really know much about its former life.

[usmcknight69]

Sounds good! Thanks for the input. Good thing is the after market warranty I have paid for everything. Only thing I am responsible for is a $100 deductible. Hopefully these are the only two that are bad.

[RRF985]

Well that's good that it's under warranty. Since it is you might end up getting 4 injectors. Even though I only had 2 throwing codes the dealer replaced all 4 on the same side.

[usmcknight69]

That's nice. I'll look into that tomorrow.


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[ZMANN]

alliant PDF if u have not seen it

http://alliantpower.com/pdf/APTB-0109-watermark.pdf

chances are you had stiction in one and when the other started to have issues it was really noticeable

that is how mine went down at 50k

[usmcknight69]

Originally Posted by ZMANN

alliant PDF if u have not seen it

http://alliantpower.com/pdf/APTB-0109-watermark.pdf

chances are you had stiction in one and when the other started to have issues it was really noticeable

that is how mine went down at 50k

Thanks for info. That was good reading.


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