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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 04-19-2012, 01:31 PM
ram941 ram941 is offline
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Default 2003 hemi getting slow and poor mpg

hey guys need some help here I've owned this 2003 dodge 2500 hemi for about two months now and it been getting slower and getting reel bad gas milage lately i popped the hood to check oil and all the fluid and saw that my coil packs are getting old looking and look like some are stating to split apart. it also looks as if the plugs and wires are all original along with everything else under the hood. i am looking into the MSD ignition for this rig and need input on if I'm gonna notice anything from doing this up grade?
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Old 04-19-2012, 03:23 PM
Maddevill Maddevill is offline
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Red face Eh?

How many miles on this puppy? Maybe just changing the plugs would help.
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Old 04-19-2012, 03:41 PM
ram941 ram941 is offline
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it has 140k miles and still hauls ass but sometimes doesn't run smooth also i can tell nothings been touched except oils changes
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Old 04-19-2012, 08:00 PM
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chefred112 chefred112 is offline
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change the plugs, wires and clean throttle body..then let us know how she runs afterwards...
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-fast freddie-
one quick 05 hemi qc...with over 250k miles on odo... on the 5.7...stoker 6.4 now, new times coming
performance mods: yes 1/8 - 7.85 @ 93.20, 1/4 - 12.10 @ 113.96
2005 Dodge Ram 1500 QC SLT: 12.107 @ 113.960 MPH
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Old 04-19-2012, 08:08 PM
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heavy2500 heavy2500 is offline
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^^^^ What fred said. When I bought my 03 2500 it ran a little rough, but changed plugs,wires, and all fluids. been runnin great since.
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