6.7 Powerstroke Diesel Injectors failing at low mileage?

[mbacfp]

Have a 2014 F550 6.7 Powerstroke on a motorhome platform. Have been changing fuel fiters, etc. diligently.

Last repair, had injector #4 replaced...code was P1558.

Fast forward 3,000+ miles later get another code P1555 which indicates injector #5.

Truck has 47,000 miles on it.

Should injectors need to be replaced at 47,000? Or does time factor into it? Impending CP4 failure or problem?

Feeling like a road of potential injector failures?

Appreciate any insight.

 

[Donald]

I have a 2015 PSD in F250. About 150K miles. No injector problems so far.

I try and only buy Exxon/Mobil branded diesel. And add a decent lubricity additive (and not MMO).

Did the person who changed the injector update the ECM with the flow rate for the new injector?

I changed the CP4 to a DCR HPFP not because of any issues but to sleep better at night. One less thing to worry about.

 

[bdcardinal]

I changed the CP4 to a DCR HPFP not because of any issues but to sleep better at night. One less thing to worry about.

I really like that DCR kit. S&S did a really good job with the fitment and having the lines look factory. If I had a 6.7 I would do that conversion.

 

[Donald]

Rather than making new injectors to an exact precision flow rate they make them to a specified flow rate with a tolerance. Then test the flow rate and mark it on the injector or on a sheet with the injector. The installer needs to update the ECM with the flow rate for the new injector.

 

[mattd]

I’ve done a bunch of DCR swaps. The kit is excellent quality and very well engineered.

No, that is not common for that mileage. Would look at possible fuel contamination.

Do you use a lubricity additive with each fill up? Mandatory IMO with a CP4

 

[The motor guy]

Motor home? Does it sit at the storage lot for months on end and not ever started?

 

[GON]

Motor home? Does it sit at the storage lot for months on end and not ever started?

That is a great question, and something @Trav might be able to shed some technical light on. Trav identified an issue with the injectors on my 2004 Lincoln Navigator. The Navigator sat for an extended amount of time, resulting in the injectors unable to perform as designed.

 

[Chris142]

What brand of filters are you using? Are they the OEM style?

 

[mbacfp]

I’ve done a bunch of DCR swaps. The kit is excellent quality and very well engineered.

No, that is not common for that mileage. Would look at possible fuel contamination.

Do you use a lubricity additive with each fill up? Mandatory IMO with a CP4

Been using Archoil...not 100% but most of the time. Have used powerservice anti-gel a couple times when cold. Use OEM fuel filters. Try to get fuel at top tier but sometimes hard when traveling.

Truck can sit for months but I usually drive it in between trips. Haven't noticed any engine issues if I did get bad fuel in the last 5,000 miles or so.

Find it weird #4 goes out and now #5 is having issues.

Service guy mentioned fuel additives can mess with injectors. This did happen after I started using anti gel a couple of times and it sat with it in the tank...which i thought I was protecting it. Only 2 times though over the last 2 years or so.

Thanks everyone.

 

[Donald]

Been using Archoil...not 100% but most of the time. Have used powerservice anti-gel a couple times when cold. Use OEM fuel filters. Try to get fuel at top tier but sometimes hard when traveling.

Truck can sit for months but I usually drive it in between trips. Haven't noticed any engine issues if I did get bad fuel in the last 5,000 miles or so.

Find it weird #4 goes out and now #5 is having issues.

Service guy mentioned fuel additives can mess with injectors. This did happen after I started using anti gel a couple of times and it sat with it in the tank...which i thought I was protecting it. Only 2 times though over the last 2 years or so.

Thanks everyone.

There was a test of diesel fuel additives for lubricity. They were all sent to a lab that performed relevant tests. Archoil was #2 and when you considered value it was #1.

I think the Exxon/Mobil branded diesel has Exxon/Mobil proprietary additives where as most diesel is #2 home heating oil with some additive for lubricity.

 

[snarl]

It is an oldie but a goody.

B

Thread 'Spicer's Diesel Fuel Lubricity Additive Test'

Aug 25, 2007

Arlen Spicer organized a test of various Diesel Fuel Lubricity additives .. The test was performed by Southwest Research Laboratory in San Antonio ..

Results are posted Here ... Lubricity Additive Study

Very interesting results for Diesel Owners ... Hat's off to you Arlen!

(Arlen also organized a popular Air Filter Study several years ago)

• Bill Plock
• Replies: 21
• Forum: Fuels and Fuel Additives: Gasoline and Diesel

 

[Donald]

Been using Archoil...not 100% but most of the time. Have used powerservice anti-gel a couple times when cold. Use OEM fuel filters. Try to get fuel at top tier but sometimes hard when traveling.

Truck can sit for months but I usually drive it in between trips. Haven't noticed any engine issues if I did get bad fuel in the last 5,000 miles or so.

Find it weird #4 goes out and now #5 is having issues.

Service guy mentioned fuel additives can mess with injectors. This did happen after I started using anti gel a couple of times and it sat with it in the tank...which i thought I was protecting it. Only 2 times though over the last 2 years or so.

Thanks everyone.

Maybe the anti gel additives can mess with injectors. But I doubt the top brand diesel fuel additives will mess with injectors. (Don't buy your diesel fuel additives at the Dollar Store.)

 

[The motor guy]

It is an oldie but a goody.

B

Thread 'Spicer's Diesel Fuel Lubricity Additive Test'

Aug 25, 2007

Arlen Spicer organized a test of various Diesel Fuel Lubricity additives .. The test was performed by Southwest Research Laboratory in San Antonio ..

Results are posted Here ... Lubricity Additive Study

Very interesting results for Diesel Owners ... Hat's off to you Arlen!

(Arlen also organized a popular Air Filter Study several years ago)

• Bill Plock
• Replies: 21
• Forum: Fuels and Fuel Additives: Gasoline and Diesel

They change so much, any test from 2007 wouldn't even be accurate.

 

[The motor guy]

That is a great question, and something @Trav might be able to shed some technical light on. Trav identified an issue with the injectors on my 2004 Lincoln Navigator. The Navigator sat for an extended amount of time, resulting in the injectors unable to perform as designed.

I used to keep my boat at a storage place that had a ton of rvs. Rarely did one ever move or even get started.

 

[Exhaustgases]

So many things wrong with the 6.7. Only 2 things right, cgi is one. I could never afford a diesel vehicle now.

That CP4 should be a recall, and dealer install of the DCR.

 

[The motor guy]

So many things wrong with the 6.7. Only 2 things right, cgi is one. I could never afford a diesel vehicle now.

I don't know why some manufacturers just can't seem to make a reliable diesel anymore.

 

[Donald]

So many things wrong with the 6.7. Only 2 things right, cgi is one. I could never afford a diesel vehicle now.

That CP4 should be a recall, and dealer install of the DCR.

So many things wrong with the 6.7. Only 2 things right, cgi is one. I could never afford a diesel vehicle now.

That CP4 should be a recall, and dealer install of the DCR.

I think my 6.7 PSD has been a pretty good engine and truck so far. I think I had to get a DEF nozzle and DEF heater replaced. The DEF heater was a recall and Ford covered it And one EGT sensor replaced. It has 4.

The only issue I have now is high fuel dilution in the oil. Maybe it was the CP4 and it's now fixed. I will pull an oil sample soon for a UOA.

 

[The motor guy]

I think my 6.7 PSD has been a pretty good engine and truck so far. I think I had to get a DEF nozzle and DEF heater replaced. The DEF heater was a recall and Ford covered it And one EGT sensor replaced. It has 4.

The only issue I have now is high fuel dilution in the oil. Maybe it was the CP4 and it's now fixed. I will pull an oil sample soon for a UOA.

That's the regen that dilutes the oil. It ejects fuel on the exhaust stroke. Only the larger semis have an actual injector in the exhaust. I think the duramax does too

 

[Donald]

That's the regen that dilutes the oil. It ejects fuel on the exhaust stroke. Only the larger semis have an actual injector in the exhaust. I think the duramax does too

But the fuel dilution was very low for the first 75K to 100K miles..

 

[mbacfp]

Update to this thread. Had the injector and pigtail replaced for P1555. Got a bad injector replacement and replaced again. All runs good but after every shutdown and restart P1555 keeps coming on. Tech believes PCM is the problem. Truck runs fine and only presents check engine light upon restarting which I immediately erase with my Scanguage and doesn't come back on until truck is restarted...strange.

Anyone have any knowledge or experience with this? They quoted $1,200 to replace and refresh a new PCM.

Take care.