So I got a 06 f350 6.0 in Dec. The truck has 47k miles now with 4inch exhaust, and the rest is stock. I was pulling a 8k lbs camping trailer over mountain passes and hills from northern Utah to southern Colorado. Everything went well on the drive down and back. I have a couple of questions on my numbers I had during the trip because I have not pulled with the truck until now.

1- EOT's were about 205 to 220 on rolling hills. (ECT followed as they should) That is higher then I have had not pulling. Normal, low, high???

2- EOT's got up to 235 then alarmed on my phone so I backed off, would go as high as 236 pulling long steep hills. (ECT's would get up to 220-222 and fan would really start to go, then ECT's would come down and try to bring EOT's down) Temp never got above 236 because I backed off. I am sure it would have gotten higher had I not backed off. Is this high, low, normal?

Temperatures outside were in the 80's

3- After getting home and running a few errands without the trailer I started to see black smoke on take offs and when I would step on the peddle. I now have the CEL on and am getting a P1335 code. Any thoughts?

4- My FICM voltage was 48 - 47 most of the time with dip to 46.5 every once and a while. I have never seen it go to 46 except when pulling this trailer on this trip. Could the the trailer be pulling needed voltage from the alternator? (maybe a stupid question)

Thanks for the info FTE.

 

P1335 - EGR

 

I'll give you some more advice. When pulling hills if the coolant starts to get high, drop the gear shift down to 3rd and let the gearing do the work. That selector is there for a reason. You'll be amazed at how fast the temps. drop.

 

Thanks for the advice 69cj...

Will cleaning the EGR valve usually clear this code and the black smoke issue?

Another number I forgot to mention is my boost was hit 25 a couple of times pulling the hills. It seemed to stay around 13 give or take a couple. Normal?

 

firstly, the ficm voltage won't be affected by the minimal load of a trailer.
not a dumb question. unasked questions are dumb.

check your system voltage. if you have a stock alternator, it's probably
13.2~13.4 volts.

it should be 14.8 with the engine running. that way it takes the load off
the ficm and keeps the batteries fully charged.

the ficm is an amplifier. it takes a nominal 12 volts, and bumps it to 48
volts to operate the injectors. it is a self regulating device. if the input
voltage is low, the ficm pulls more current to get the job done.

more current means more heat. more heat burns out ficms.

your temperatures are, IMNSHO, too high for ambient temp of 80....

i was driving home from Pasadena today... stop and go. temp was
98 on the iphone, but rolling on the 210, at 60, my intake temp was
106, and in stop and go traffic, getting to the 210 freeway, my intake
temp was 133. my vehicle weighs 10,500#.

my peak coolant temp was 194, and peak oil temp was 192.
BPD external oil cooler.

and this is in a van, and they run hotter, with a smaller engine compartment.

you are gonna have some real problems on a nice hot memorial day weekend..... just my opinion......

 

P1335 is a code that can come from anything from turbo, ebp sensor or plugged tube, icp issues, high pressure oil issue, low side oil volume issue, FICM concerns (especially low voltage), failing injectors, low battery voltage or alternator issue, fuel pump, egr valve, damaged MAP sensor or hose, etc. To know for sure will require more troubleshooting. An egr valve stuck wide open (you WILL have a P1335 w/ this condition) will cause a miss, major loss of power, and lots of black and gray smoke, and stalling. You may also see EGR marbles that are holding the EGR valve open - this may be a result of a slight leak in an EGR cooler.

 

Temps look fine for the most part. How was the ECT EOT delta?

 

Under a load pulling the hills, the delta would be 5, give or take a few. on flat ground 10, give or take a few. After cresting a hill... 20, but the EOT would come back down to ECT.

 

What sort of trouble shooting should I start with. I was planning on cleaning the EGR valve any way, is that a good place to start?

 

What can I do to keep/get my temps down? Any mods or is that just how my engine is?

 

Don't pull a 8000 lb trailer, seriously, I wouldn't be concerned with those temps loaded.

 

Pulling the EGR valve to inspect/clean would be a reasonable place to start.

 

I would not be happy if my truck derated because of high oil temperature - especially on an 80 degree day only towing 8000 pounds. because of that, I too think the temps are a little too high.

Maybe it is EGR related. Post up what you find.

 

What is the defueling point for oil temp?

 

Hey - good question. It is 253*F.

I guess I didn't read the thread very thoroughly (sorry) - the OP said his oil temp alarmed on his phone (not the same as defueling)! Not sure what "alarmed on the phone" means really.

That being said, he did say the oil temp got to 235. With a 15 degree delta, that means the coolant temp is 220*F or warmer (which he stated that they did reach this range).

The engine defuels at 221 *F coolant temp.

The temps still seem high to me (but thanks for the oil temp question so I could ammend my post!!!).