3 thump-thump-thumps drivers side psd???
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3 thump-thump-thumps drivers side psd???
Whenever I punch the throttle on my '06 f250 then let off,I hear 3 thumps in the motor at drivers side..This only occurs for the first five to ten minutes of running then quits..Does anyone have any ideas as to what this could be?? Thanks a bunch.. I have a whopping 532 miles on my new truck..
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Originally Posted by jetch114
Whenever I punch the throttle on my '06 f250 then let off,I hear 3 thumps in the motor at drivers side..This only occurs for the first five to ten minutes of running then quits..Does anyone have any ideas as to what this could be?? Thanks a bunch.. I have a whopping 532 miles on my new truck..
May be "turbo fart" which is the release of pressure when you let off the throttle so quick???
Break it in for longevity...
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From: Hendersonville, NC
Originally Posted by jetch114
Whenever I punch the throttle on my '06 f250 then let off,I hear 3 thumps in the motor at drivers side..This only occurs for the first five to ten minutes of running then quits..Does anyone have any ideas as to what this could be?? Thanks a bunch.. I have a whopping 532 miles on my new truck..
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From: Hendersonville, NC
Originally Posted by Beachbumcook
Don't be punching the throttle on such a new truck!!!!
The FMC-provided owner's manual only says not to tow, and to vary RPM during break-in period. I know of no better way to vary RPM than to run the truck through the gears at WOT.
As a technical side note, higher cylinder pressure during break-in will help bed the upper keystone and center compression rings into a stationary rotational position on the cylinder wall faster than babying it will. The added load will also help seat the lower crankshaft main bearings into the bedplate, and the higher RPM (which in turn creates forward crankshaft thrust/rearward camshaft thrust due to the helical cut rear timing gears) will help break-in with the crank thrust bearing and help the lifters to find a seat position on the camshaft lobes to prevent it from walking back forward when unloading (chopping) the throttle.
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I would normally yield to your vast technical knowledge Matt. But, hammering a 500 mile truck, likely before it has reached optimum operating temps (engine or tranny for that matter) seems like a pretty extreme break-in procedure.
If it was my money I would make sure the truck was at normal temps for all components prior to punching the throttle. Not sure 10 minutes is enough.
If it was my money I would make sure the truck was at normal temps for all components prior to punching the throttle. Not sure 10 minutes is enough.
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Let me rephrase...I didn't mean hammer it down to the floor. I meant when I hit the throttle and then let off (for break-in pourposes) I hear the three thumps(for lack of a better term).. As I stated,after I drive for a while it wont do it anymore..Was just curious if it was noemal or not..
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From: Hendersonville, NC
Originally Posted by kw5413
I would normally yield to your vast technical knowledge Matt. But, hammering a 500 mile truck, likely before it has reached optimum operating temps (engine or tranny for that matter) seems like a pretty extreme break-in procedure.
If it was my money I would make sure the truck was at normal temps for all components prior to punching the throttle. Not sure 10 minutes is enough.
If it was my money I would make sure the truck was at normal temps for all components prior to punching the throttle. Not sure 10 minutes is enough.
Last edited by PSD 60L Fx4; Nov 22, 2006 at 01:17 PM.
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From: Florence,SC
Originally Posted by jetch114
Let me rephrase...I didn't mean hammer it down to the floor. I meant when I hit the throttle and then let off (for break-in pourposes) I hear the three thumps(for lack of a better term).. As I stated,after I drive for a while it wont do it anymore..Was just curious if it was noemal or not..
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From: 3rd Rock
Originally Posted by PSD 60L Fx4
Mind giving a technical explanation for this one?
The FMC-provided owner's manual only says not to tow, and to vary RPM during break-in period. I know of no better way to vary RPM than to run the truck through the gears at WOT.
As a technical side note, higher cylinder pressure during break-in will help bed the upper keystone and center compression rings into a stationary rotational position on the cylinder wall faster than babying it will. The added load will also help seat the lower crankshaft main bearings into the bedplate, and the higher RPM (which in turn creates forward crankshaft thrust/rearward camshaft thrust due to the helical cut rear timing gears) will help break-in with the crank thrust bearing and help the lifters to find a seat position on the camshaft lobes to prevent it from walking back forward when unloading (chopping) the throttle.
The FMC-provided owner's manual only says not to tow, and to vary RPM during break-in period. I know of no better way to vary RPM than to run the truck through the gears at WOT.
As a technical side note, higher cylinder pressure during break-in will help bed the upper keystone and center compression rings into a stationary rotational position on the cylinder wall faster than babying it will. The added load will also help seat the lower crankshaft main bearings into the bedplate, and the higher RPM (which in turn creates forward crankshaft thrust/rearward camshaft thrust due to the helical cut rear timing gears) will help break-in with the crank thrust bearing and help the lifters to find a seat position on the camshaft lobes to prevent it from walking back forward when unloading (chopping) the throttle.
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our 05 with 60 000kms does this as well as our customers boom trucks with the 6.0
from what i have heard it is normal and it whumps through the air to air. i believe ford says it it normal but annoying. funny though when you punch it through a drive through and the "whump whump whump" makes the lady walking jump about 2 feet in the air lol
from what i have heard it is normal and it whumps through the air to air. i believe ford says it it normal but annoying. funny though when you punch it through a drive through and the "whump whump whump" makes the lady walking jump about 2 feet in the air lol
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From: Florida
re
I run the air raid intake (yes I know it is lame, unnecessary and potentially harmful). However, I had this noise on my 2003 6.0 and took it into the dealer for this exact thing. The dealer told me it was the Turbo backing off on the variable vanes. I get the same noise on my 2005 6.0 and the air raid makes the noise even louder. It is apparently a normal thing if you back off the throttle at specific times.