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  #1  
Old 04-07-2011, 10:42 AM
mfever mfever is offline
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Default 2003 1500 ram 4.7 po306 code need help

2003 1500 ram 4.7 po306 code need help
Hello hows it going this is my sons truck it was running very rough so i borrowed a friends code reader and had po300 po303 po306 codes I changed plugs and now it runs better then it did but still not right still have a po306 code.I swapped plugs with number 4 still code swapped coils still po306 plug looks wet and darker then the new plugs when i took out the old plugs it was black and wet only one.I hear people say catalatic converter plugged then why number 6 also egr valve then why number 6 any help would be great I have not done a compression test yet to see if it is a valve or not.thanks
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Old 04-07-2011, 10:45 AM
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Default did compression test

Hello i guess i posted in the wrong place next time i will get it right.But anyway did a compression test today
1=145 2=145
3=150 4=125
5=150 6=115
7=150 8=145
That was at running temp cranking equal times per hole ....myself i am thinking head gasket between 4 and 6 the engine lost a water pump last summer on the highway going to the lake dont know how hot the engine got in the red anyway and for how long i dont know my kid was driving.I guess it could be a crack aswell between the two.Any other opinions would be helpfull thanks
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Old 04-07-2011, 12:01 PM
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A warped head seems more likely than a gasket problem. You shold do a leak down test on 4 & 6 to see where the compression is going.
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Old 04-10-2011, 07:15 PM
mfever mfever is offline
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Yes very possible but just the same i think the head has to come off and once off i will get it machined and vacuum check the valves.Thanks for the input
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Old 04-10-2011, 07:24 PM
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Yup...the leakdown test will definitely help pinpoint where the compression is going.
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Old 04-11-2011, 11:25 PM
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Default

Sure seems like a head gasket. But since you gotta take the head off to get to that, may as well have the head checked...

By the way... I'm currently replacing the same side head... $399 for a head...

10mm and 15mm and a 13mm are going to be your friends.
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