Check Engine light
#1
Check Engine light
I have a 2005 Chevy Silverado 2500Hd 2wd crew cab. 6.0 litre I have had the motor replaced. Ever since the motor was replaced i get a check engine light warning with erroe code 300 at 2300+ RPMs and 68 MPH. They have checked the coils, injectors. Plugs are OE Iridiums with new wires. They have checked compression, fuel pressure, and for leaks and or cracks in the manifold. Any ideas??? Could this be a computer thing. I never got an error or a engine light before with the old motor
#5
Yes it only seems to happen at 2300 rpms or higher. I cant feel any miss firing at all. Idle rpm was checked and all is good. All sensors have been replaced. The coils have been checked, plug wires and plugs all replaced, injectors checked, and checked for cracks in head. The only thing i can think of that hasnt been replaced or checked is the fuel filter. Ive seen where it says that fuel pressure can be a cause. Can you think of anything else it could be???
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#10
Well to end the saga of this engine problem. It turns out it was an EGR valve that was clogged. It was causing random misfire code. The EGR valve has been replaced and there is no longer any error code showing. Talk about one hell of a headache. Thank you Kevin for your help and suggestions.