Question about Dodge Ram 1500

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I changedmy plugs ,coils ,& fuel injectors .Getting code p300 multiple misfire

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If has a distributor check points and cap for cracks if it's not that it may be the module.
if it's got an ecu it may need re-programming. if it's none of these it'd be something more serious. eg head gasket, cracked head etc.

Posted on Mar 17, 2011

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Posted on Jan 02, 2017

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P300 engine code replaced coil,wire,control module runs somewhat better but still has a steady miss and back fires on acceleration or under a load 1998 chevrolet k1500 z71


did you replace all the plug wires and spark plugs if not that may be your problem did not understand if you did or not from your post

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2 Answers

Loss of power


Some things to check since it has sat so long.
Bad gas Fuel filter dirty injectors dirty throttle body
The p300 code is a multiple cylinder misfire code. It sounds to me from what you described, that you are having some type of fuel pressure issues.

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It could be a clogged fuel filter, bad gas. Or if you have done alot of modifications to it, the injectors may not be able to keep up.

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