Yet another P0300 error code - DodgeForum.com


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Yet another P0300 error code

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  #1  
Old 05-09-2017, 11:52 AM
HemiForever
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Default Yet another P0300 error code

The truck is a 2005 Dodge Ram 1500, 5.7 Hemi, about 89,000 Kilometres. I have a P0300 code with nothing else, it seems to only happen on restarts and never from a cold start that I am aware of and until recently it was very intermittent and would not happen for months now it seem to happening a lot more often. I have changed spark plugs, wires from a Dodge dealer so Champion plugs and factory wires, I also changed the EGR valve. I am not sure where I should go from here I have bluetooth OBD 2 reader with the Torque app but not sure what I should be looking for. Any help as where I should check next would be helpful, I am cleaning out my Throttle body tomorrow and if there is something else I should check while I am there let me know. Thanks for any help you can give me.
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Old 05-12-2017, 11:04 AM
HemiForever
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Nothing? No ideas? Asked wrong? Not enough details? Anything?
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Old 05-12-2017, 01:18 PM
TrueDogman
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Are you feeling a misfire?
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Old 05-17-2017, 11:52 AM
HemiForever
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No misfire that I can feel. It happens only at low RPM's I can throttle through the issue if I rev the engine as it about to stall, it runs fine after I get through the rough idle. It is starting to happen even on cold starts now. I am just at a loss, nothing I read or researched seems to give me any answer. I am game to try anything at this point. So any suggestions are welcome. It runs like a dream when it is not about to stall, it idles just round 520 RPM but now it just feels like it wants to stall out for no reason and the only code I get it P0300.
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Old 05-17-2017, 12:01 PM
TrueDogman
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Only a thought. Maybe check for the common issue of a broken valve spring. Although it doesnt completely make sense to do this....as you mention at times it runs like a dream and with a broken valve spring theoretically it should run rough all the time. But its a guess...possibly a broken valve spring is sufficient to close the valve for proper compression and others times it is not. ???
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Old 05-17-2017, 02:41 PM
HemiForever
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Thanks I will look into the valve springs, I might as well since I am just at a loss. I am going to also go over my electrical system to make sure nothing in the area is the issue. Any other ideas I am open to looking into if anyone else has suggestions.
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Old 05-18-2017, 01:45 PM
HemiForever
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It is not the valve springs, so I guess I am SOL for ideas at this point in time. Still going to give the electrical a once over from top to bottom and hopefully it I find something there, going crazy trying to figure this one out.
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Old 05-18-2017, 02:36 PM
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Just a total guess here for me now. You might consider crankshaft and/or camshaft sensor ? Seems your problem is more pronounced when cold. Maybe do a resistance check on the sensors when cold ? Or simply put a new one on one at a time? I would start with crank sensor.
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