Successful Trip
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Logistics Pro
Joined: Jul 2014
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From: Houston, Texas
Successful Trip
*UPDATE*
Took my truck on an extended trip - yes, I'm a risk-taker. Houston to Dallas to St. Louis to Chicago to Ft. Wayne to Nashville to Memphis back to Dallas and then home to Houston. Pulling a 6,500lb. gooseneck the entire time, most of it with only 2,000-3,000lbs in cargo, but on the Houston/Dallas run I had a 9,000lb truck on it. Temps down in the teens around Chicago and Ft. Wayne.
Recall from my last posts here, my ScanGauge was showing no ICP voltage and an IPR% of 32.8 at warm idle. That didn't change the entire trip.
Results: my truck ran great except when I was carrying the heavy truck to Dallas. Not sure if it's caused by the heavy load or high engine temps (that's the only time EOT got above 208), but something started slipping at that point - the noise was something racing at high rpm, faster than the engine, as if the noisemaker had been engaged with the engine, running the same RPM, and then a clutch slipped and it races faster than the engine. But, if you let off the pedal, the racing part slowly slows to the engine's rpm and meshes again.
My guess is that it's the fan clutch - the Ford tech said mine was going out. And the noise starts when the engine is hotter than normal, and never occurred when I was driving up north (colder).
If it's the fan clutch, my question to the forum is: would I be screwing up by getting a junkyard replacement? The dealership wanted $500 for a new one and they're less than $100 from the junkyard. It seems like a fairly benign part - either works or it doesn't; doesn't endanger you or the motor when it fails, etc.
On the other hand, I also notice that my turbo never outputs more than 20lbs of boost. Even with that heavy load pulling up the hills around Tennessee and Kentucky, it never went above 20. Is that normal? Also, should my truck struggle to pull 15,000-16,000lbs (trailer + cargo). I assumed that since its towing capacity is quite a bit higher than that, it should pull that weight easily. And, I was only getting like 8-9 MPG. Does a turbo make a noise like that?
Finally, on the two cold mornings, the truck was very hard to start. I didn't have the block heater plugged in and I have two bad glow plugs. It would do a half crank and stop. After about 15 attempts, it finally started both mornings. I guess that was to be expected.
Took my truck on an extended trip - yes, I'm a risk-taker. Houston to Dallas to St. Louis to Chicago to Ft. Wayne to Nashville to Memphis back to Dallas and then home to Houston. Pulling a 6,500lb. gooseneck the entire time, most of it with only 2,000-3,000lbs in cargo, but on the Houston/Dallas run I had a 9,000lb truck on it. Temps down in the teens around Chicago and Ft. Wayne.
Recall from my last posts here, my ScanGauge was showing no ICP voltage and an IPR% of 32.8 at warm idle. That didn't change the entire trip.
Results: my truck ran great except when I was carrying the heavy truck to Dallas. Not sure if it's caused by the heavy load or high engine temps (that's the only time EOT got above 208), but something started slipping at that point - the noise was something racing at high rpm, faster than the engine, as if the noisemaker had been engaged with the engine, running the same RPM, and then a clutch slipped and it races faster than the engine. But, if you let off the pedal, the racing part slowly slows to the engine's rpm and meshes again.
My guess is that it's the fan clutch - the Ford tech said mine was going out. And the noise starts when the engine is hotter than normal, and never occurred when I was driving up north (colder).
If it's the fan clutch, my question to the forum is: would I be screwing up by getting a junkyard replacement? The dealership wanted $500 for a new one and they're less than $100 from the junkyard. It seems like a fairly benign part - either works or it doesn't; doesn't endanger you or the motor when it fails, etc.
On the other hand, I also notice that my turbo never outputs more than 20lbs of boost. Even with that heavy load pulling up the hills around Tennessee and Kentucky, it never went above 20. Is that normal? Also, should my truck struggle to pull 15,000-16,000lbs (trailer + cargo). I assumed that since its towing capacity is quite a bit higher than that, it should pull that weight easily. And, I was only getting like 8-9 MPG. Does a turbo make a noise like that?
Finally, on the two cold mornings, the truck was very hard to start. I didn't have the block heater plugged in and I have two bad glow plugs. It would do a half crank and stop. After about 15 attempts, it finally started both mornings. I guess that was to be expected.
Fleet Mechanic
Joined: Jul 2013
Posts: 1,402
Likes: 114
From: Tuscaloosa, AL
Fan clutch can be purchased for less away from the dealer. I would put a used fan clutch on mine without much thought.
The "slipping" you are sensing it's probably the fan clutch engaging. That fan is huge and sounds like a jet when the clutch locks up.... Which brings me to this point. If the "slipping" is your fan, it means your fan clutch is working. Why do you think it's bad?
The puzzling part is you say your eot never exceeded 208. If so, your ect could not have been over 200. If not, your fan clutch should not have locked up and caused the fan to go full speed. Maybe someone else more knowledgeable had other ideas about what the "slipping" is.
I don't know much about the remainder of the post, but will comment with opinions.
You should build up to about 28 lbs of boosts when you stomp it from a slow roll. I don't have much experience with max boost numbers towing around 5k lbs, but would think you could get 25 routinely when the power of needed. Read your codes. If you don't have a low boost code, you are likely fine.
Towing 5k lbs should be pretty easy. I'll speculate the icpv issue may have you a little under powered.
I tow a 8.5k travel trailer. It's a major wind sail and I tow 70 to 80 mph. It will shift down when climbing some long interstate grades to maintain that speed. I don't know if that's normal or not because I don't have experience with other trucks. I did tow a 3.5 k lbs trailer and the truck barely knew it was back there. It didn't shift down towing any grade at any speed.
The only time I've towed the large travel trailer it threw a low boost code. I cleaned the turbo. Turns out I have some significant rust on the surface where the veins ride. I put it back on and its giving me boosts up to 25 when I stomp it doing 50 and empty. I'll see if it throws a low boost code when I tow again.
I didn't expect it to gear down pulling long grades with 8.5 k lbs doing 75 mph. Iv was expecting more power, but don't know what "normal" is.
The "slipping" you are sensing it's probably the fan clutch engaging. That fan is huge and sounds like a jet when the clutch locks up.... Which brings me to this point. If the "slipping" is your fan, it means your fan clutch is working. Why do you think it's bad?
The puzzling part is you say your eot never exceeded 208. If so, your ect could not have been over 200. If not, your fan clutch should not have locked up and caused the fan to go full speed. Maybe someone else more knowledgeable had other ideas about what the "slipping" is.
I don't know much about the remainder of the post, but will comment with opinions.
You should build up to about 28 lbs of boosts when you stomp it from a slow roll. I don't have much experience with max boost numbers towing around 5k lbs, but would think you could get 25 routinely when the power of needed. Read your codes. If you don't have a low boost code, you are likely fine.
Towing 5k lbs should be pretty easy. I'll speculate the icpv issue may have you a little under powered.
I tow a 8.5k travel trailer. It's a major wind sail and I tow 70 to 80 mph. It will shift down when climbing some long interstate grades to maintain that speed. I don't know if that's normal or not because I don't have experience with other trucks. I did tow a 3.5 k lbs trailer and the truck barely knew it was back there. It didn't shift down towing any grade at any speed.
The only time I've towed the large travel trailer it threw a low boost code. I cleaned the turbo. Turns out I have some significant rust on the surface where the veins ride. I put it back on and its giving me boosts up to 25 when I stomp it doing 50 and empty. I'll see if it throws a low boost code when I tow again.
I didn't expect it to gear down pulling long grades with 8.5 k lbs doing 75 mph. Iv was expecting more power, but don't know what "normal" is.
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Logistics Pro
Joined: Jul 2014
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From: Houston, Texas
QUOTE=BryanStein
The puzzling part is you say your eot never exceeded 208. If so, your ect could not have been over 200.
I said the slipping sound only occurred when the EOT was over 208, and it only got over 208 when I was pulling the big truck here in warmer Texas. It did get over 208, but not over 217, and only that high for a minute.
If you don't have a low boost code, you are likely fine.
No low boost codes.
Towing 5k lbs should be pretty easy.
It is. My gooseneck weighs more than that empty and it pulls just fine empty. I was thinking more about 14-16,000 lbs (trailer plus cargo).
I'll speculate the icpv issue may have you a little under powered.
I'm home for a week now and will be trying to figure out that problem.
I didn't expect it to gear down pulling long grades with 8.5 k lbs doing 75 mph. Iv was expecting more power, but don't know what "normal" is.
I expect some of my problem was that I was having to drive slow - about 50mph because of a fragile load - made it hard to climb hills without the good running start of a 70 mph speed.
The puzzling part is you say your eot never exceeded 208. If so, your ect could not have been over 200.
I said the slipping sound only occurred when the EOT was over 208, and it only got over 208 when I was pulling the big truck here in warmer Texas. It did get over 208, but not over 217, and only that high for a minute.
If you don't have a low boost code, you are likely fine.
No low boost codes.
Towing 5k lbs should be pretty easy.
It is. My gooseneck weighs more than that empty and it pulls just fine empty. I was thinking more about 14-16,000 lbs (trailer plus cargo).
I'll speculate the icpv issue may have you a little under powered.
I'm home for a week now and will be trying to figure out that problem.
I didn't expect it to gear down pulling long grades with 8.5 k lbs doing 75 mph. Iv was expecting more power, but don't know what "normal" is.
I expect some of my problem was that I was having to drive slow - about 50mph because of a fragile load - made it hard to climb hills without the good running start of a 70 mph speed.
Fleet Mechanic
Joined: Sep 2013
Posts: 1,303
Likes: 84
Glad to hear it ran decent for you. I guess I don't remember the particulars of your truck but I think I remember reading my ccsb was only rated for 15,400k with a gooseneck of fifth wheel.
The sound was more than likely your fan kicking in. It can catch you off guard as I have only heard mine a handle full of times.
The sound was more than likely your fan kicking in. It can catch you off guard as I have only heard mine a handle full of times.
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