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Custom Dodge Ram Performance Mods - Engine - 5.7 HEMI V8 Discuss modifying your Dodge Ram with Performance Parts and Accessories!
Factory Spec: 5.7-liter HEMI® V8 engine - 390 horsepower, 407 lb-ft of torque.


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  #1  
Old 01-06-2011, 01:31 PM
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Default 1500 rpm waw waws

Noticed this about a month ago buthe truck runs great just from normal acceleration i get what sounds like a mild waw waw waw waw pitch getting higher as the engine revs from 1000 to 2000 rpm's. Almost like the ecu is trying to choke the trottle but it is not extreme. Any info would be great. Im also suspecting that it might be my plugs fouling cause im running 2 degrees colder NGKs other than that the truck's a beast.
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  #2  
Old 01-06-2011, 02:37 PM
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When I hear a waw waw (LOL) sound on a vehicle I first think of the vehicle needs an exhaust. I have never heard that described as you have getting higher piched. I would check with Randy AKA RamTech to see if he can shed any light. Personally I say stick with OEM plugs.
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Old 01-07-2011, 01:10 AM
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Default ram its no problem mine does it also because,

we opened up the exhaust and there isent as much back pressure. the tq in the lower rpm just isent there anymore, i just shift down one gear and its fine. it only happens when were in our finnal drive gear.
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Old 01-07-2011, 11:52 AM
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Yeah i also think when its going in and out of MDS its the MDS making the waw waw waw sound
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Old 01-07-2011, 02:49 PM
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If its during acceleration, its not the MDS. MDS only works when cruising with rpm in 1000 - 3000 or deceleration.
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Old 01-08-2011, 12:20 AM
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Default my mds is totaly off

its when iam in the final gear and very low in the rpms, have to give a little to get a lot
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Old 01-08-2011, 12:35 AM
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Quote:
Originally Posted by SPEEDFREAK View Post
its when iam in the final gear and very low in the rpms, have to give a little to get a lot
Sounds like the MDS "drone". Is the ECO light on at the top of the EVIC?
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Old 01-08-2011, 03:35 AM
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MDS sounds like crap on an open exhaust...when you say higher speeds at low rpms, that's whats happening...why the colder plugs and i don't know many people using MSD coils..The high performance guys still run stock coils..
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Old 01-08-2011, 03:38 AM
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not sure which gen truck your running but 3rd gens don't react well to iridiums in the long run...
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