New member. I have 2010 6.4 super duty. I'm loosing power on inclines towing a 13500 cyclone FW. It drops me to about 30 miles an hour and is burning fuel more than what I believe to be normal, 6-7 miles a gallon. I took to dealer and everything shows fine. Is this normal? Any ideas what can be causing this? The inclines are not high degrees. Normal highway hills. anyone with same issue towing with a similar truck? Would an air exhaust system, like banks help any?

 

Has it thrown any codes? Recently my 2008 threw a code for high fuel rail pressure and subsequent loss of power. The dealer had a reflash that solved the problem. But the key is to know if it threw a code.

 

Moved to the 6.4 forum.


It sounds to me like you are saying you have full power on the level road surfaces but on hills it goes into reduced power.


Does the clutch fan come on? Hear an airplane sounding noise from under the hood?


What does the temp guage do?


What codes do you have?

 

no codes at all, temp steady in the center. fan clutch does come on.
on level road, I do ok. Can't go faster than 60-65 for passing. I get it to that speed with a little struggle.

 

no codes at all, temp steady in the center. fan clutch does come on.
on level road, I do ok. Can't go faster than 60-65 for passing. I get it to that speed with a little struggle.

 

ok, so you are then in constant limp mode.


Who scanned for codes?


Most likely you have a code but it is ford specific probably the P0088 code. This code is for the HPFP.

 

When was the last time you changed both Fuel filters?

 

Ford dealer

 

Less than 10000 miles

 

You need a certified diesel tech.


If you can take it to another location..


Also contact the ford cust svc rep here. She if she can help set you up.

 

Welcome to the forum, Mr_wp. As a next step, I'd recommend making an appointment at your dealership so they can inspect. How many miles are on your truck currently? Come back and post your results after you've visited the dealer; I'll be able to look into some ways to help after you've received a diagnosis.

Crystal

 

At Ford dealer now. No codes, Everything looks normal after diagnostic. They're asking me to bring back with trailer and do a road test. I'll update once I get it done.

Thanks for help.

 

That is the best idea..also what kind of boost do you get when towing?

 

That's the problem there, I hear the turbo kick in but no power. At first I thought it was the normal down shifting up hill. Once I saw all the other trailer flying by. I started to inquire and realize that 30 mph on a not so long and not too steep incline was not normal. I'm here in southern Cali and haven't tried the grapevine up fwy 5. I don't think I can make it and if I do I'll be there for quite a while. According to dealer turbo is fine. The truck though has been burning a lot fuel or a while now. I change the fuel filters and did an injector clean there at ford. Did not help. truck has a little over 66k miles. She's a baby to be giving me such a headache.

 

Have you gotten any info back from the dealer? Im curious to hear the verdict.

The only times my 6.4 has gone into limp mode was #1 it had a faulty EGT temp gauge in the exhaust pipe just behind the DPF. It threw a code and i replaced the sensor myself, all better.

#2 was when the DPF was full and the truck had not completed a successful regen in a while apparently (which to me was weird as i drove the rtuck 30 miles to work all highway and then 70 miles to my ranch to feed cattle after work and then 25 or so miles back home after feeding) so this case puzzled me. Since that limp mode i have put my truck on the Diet that everyone loves these trucks to go on.

The second case there was also a code thrown so the no code part from your truck really perplexes me.

I once had an intercooler hose blow off of the end of the turbo and it sounded like my entire truck self destructed but it was a small repair. This kept me from having any turbo pressure at all though as the turbo lost all compression i guess.