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Old 03-01-2014, 05:59 AM   #1
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I have a 2003 ram 5.7 hemi and i have a miss in the engine. it idles rough and jerks when going down the road. The codes i pulled was a P0300 and P0303 and i changed the spark plugs and still had code p0303 so i changed the coil. i still have this code and going to work this morning my power loss light came on and now im have codes P0300, P0303, P0203, P0204, P2106 and P2199. has anybody had this problem i am lost and what to do next. Please any help i can get or feedback would be greatly apperciated. Thanks.

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Old 03-01-2014, 08:10 AM   #2
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lane098
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Check out the Texas Chapter of HTC too .

One of the engine guru's should give you some help soon .




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Old 03-01-2014, 08:28 AM   #3
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Old 03-01-2014, 01:31 PM   #4
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Welcome to the forum, always good to see another 03 join up. Your description unfortunately sounds like the classic 03/04 broken valve spring. It is not recommended to drive the truck until the valve covers have been removed and the springs inspected. Good luck and let us know what you find. Pictures are always good.
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Old 03-01-2014, 01:41 PM   #5
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Def pull the covers and inspect the springs if the coil and plug are now new it's either a broken spring,worn out/broke rocker, or no compression at all (unlikely)
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Old 03-01-2014, 08:12 PM   #6
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Old 03-01-2014, 08:53 PM   #7
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Welcome. Sorry to hear about issues with your 03. Sad to say but I had a broken valve spring on mine after I got it many years ago. It sounds like the same thing mine was doing.

Good luck and keep us posted.
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Old 03-01-2014, 09:25 PM   #8
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When you changed the plugs was any of them smashed closed?
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Old 03-02-2014, 03:41 AM   #9
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Definitely pull off the Valve cover for inspection.
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Old 03-02-2014, 06:56 AM   #10
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The 03s have weak valve springs. Keep us posted.
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