P0300 code
#1
P0300 code
This is a way off topic but I don't know where else to even look. Its for a 2004 Silverado 2500HD...I bought a set of ported heads for it because I hade several exhaust manifold bolts snap off. Short story, I threw in many new parts on it since it was apart and now that its back together and runng it throws a P0300 code.
Injectors tested and passed, all spark plugs fire...hoses were inspected "by me" so not 100% sure there isn't a hairline crack on them. New intake gasket, new crank positioning sensor...I also did a catalytic converter inspection (pressure test), its all good. I have not touched the O2 sensors.
The truck idles great, it turns great and starts right up...no leaks :-) but as soon as I pass the revs over 1500rpm the service engine light blinks and gives the code. If I don't rev it the code does not come up. I left it on idle for 5 minutes...engine temp got up to normal operating range with no code but as soon as I gave it gas it started blinking. When I drive it it feels like it wasn't to bogg down...lack of power...
Any ideas?
Injectors tested and passed, all spark plugs fire...hoses were inspected "by me" so not 100% sure there isn't a hairline crack on them. New intake gasket, new crank positioning sensor...I also did a catalytic converter inspection (pressure test), its all good. I have not touched the O2 sensors.
The truck idles great, it turns great and starts right up...no leaks :-) but as soon as I pass the revs over 1500rpm the service engine light blinks and gives the code. If I don't rev it the code does not come up. I left it on idle for 5 minutes...engine temp got up to normal operating range with no code but as soon as I gave it gas it started blinking. When I drive it it feels like it wasn't to bogg down...lack of power...
Any ideas?
#2
Re: P0300 code
The old P0300 can sometimes be a hard one to find. It means there is a random misfire. I don't know about the idiosyncrasies of the Silverado, but I think I'd start with plugs and plug wires. You could wait until it's dark, take a squirt bottle and mist the wires and plugs and see if you can see any arcing.
#3
Re: P0300 code
The old P0300 can sometimes be a hard one to find. It means there is a random misfire. I don't know about the idiosyncrasies of the Silverado, but I think I'd start with plugs and plug wires. You could wait until it's dark, take a squirt bottle and mist the wires and plugs and see if you can see any arcing.
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