Higher pitch engine sound
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From: Poconos
Higher pitch engine sound
So we were finishing up a 500 mile ski trip in N/E PA (handled great in the snow) with our 08 350 with a 4,000 lb camper on board, climbing up the hill into the development, and when I accellerated up the hill, the engine sound changed from its normal deep growl to a higher pitched 'tinny' sound. It stopped when i let off the throttle a little, and came back when I accellerated more. Abrubt change in pitch. Like from a A below middle C up to a D sharp.
Anyone else experience this? Should I be worried (my first diesel, so the noises are a little strange to me)? No loss of power, wasn't in regen, wasn't shifting (rpms were constant). Temp gauges all OK right in the middle.
Was the EGR doing something funny?
Have about 2,000 miles on the truck, it was running about 30 psig boost going up the hill, the temperature had dropped to about 6 degrees F. Had just gone down a long steep hill in tow/haul about 5 miles back.
Anyone else experience this? Should I be worried (my first diesel, so the noises are a little strange to me)? No loss of power, wasn't in regen, wasn't shifting (rpms were constant). Temp gauges all OK right in the middle.
Was the EGR doing something funny?
Have about 2,000 miles on the truck, it was running about 30 psig boost going up the hill, the temperature had dropped to about 6 degrees F. Had just gone down a long steep hill in tow/haul about 5 miles back.
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From: Poconos
Thanks for your help, but it wasn't a gradual increase, it was more like a switch was turning something on or off, or a gate opening and changing the sound.
Out of town right now, so I will have to take it out this weekend and see whats up. Covered with mud now from the road treatment in PA - we were on the Rt 80 Sunday about 5 miles away and about 3 hours after the 62 car pile-up on Rt 81 near Hazleton due to a snow squall.
Out of town right now, so I will have to take it out this weekend and see whats up. Covered with mud now from the road treatment in PA - we were on the Rt 80 Sunday about 5 miles away and about 3 hours after the 62 car pile-up on Rt 81 near Hazleton due to a snow squall.
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Joined: May 2006
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From: MACON, GA
I think your electric fan kicked in. Mine has a similar sound on a steep grade. Are you running with a grille cover? Your engine compartment temps will rise faster with a grille cover, even in cold snowy weather. If you have an EXT temp gauge run with it on, and see if it increases when you hear the sound. Proof of the fan kicking in.
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Originally Posted by ab257z
Thanks for your help, but it wasn't a gradual increase, it was more like a switch was turning something on or off, or a gate opening and changing the sound.
Out of town right now, so I will have to take it out this weekend and see whats up. Covered with mud now from the road treatment in PA - we were on the Rt 80 Sunday about 5 miles away and about 3 hours after the 62 car pile-up on Rt 81 near Hazleton due to a snow squall.
Out of town right now, so I will have to take it out this weekend and see whats up. Covered with mud now from the road treatment in PA - we were on the Rt 80 Sunday about 5 miles away and about 3 hours after the 62 car pile-up on Rt 81 near Hazleton due to a snow squall.
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snegri
1997 - 2006 Expedition & Navigator
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Aug 30, 2003 09:57 AM
