P CODES (POWERTRAIN) P0300 - P0399

I've Replaced The Valve Stem Seals, Plugs, Wires, Cap, Rotor, Cpi Fuel Injector Unit And It Still Runs Rough When It's Cold And Idling...

Hey Guys My 96 Ford Ranger 3.0 Threw This Code. The Truck Still Runs Good.I Tried To Reset It But The Code Came Back. Ive Done Some Research...

Replaced Camshaft Position Sensor And Still Get The Engine Code. It Is Hard Starting Cranks A Long Time Before Starting. Could This Have...

Hello Everyone, My Vehicle Has Been Throwing These Codes. I've Replaced The Plugs And Coils; I Don't Smell Any Fuel Or Anything And...

My Chev 1500 Is Very Hard To Start When It Has Sit For More Than A Day. As Of Right Now It Has Sit For Two Days And I Can't Get It To Start...

Check Engine Light On, (not Flashing) Code Indicates Engine Cylinder One And Three Misfiring Despite "tune Up". Plugs, Fuel Filter, (no...

I Have Replaced Injectors The Fuel Filter Cleaned The Maf Sensor Checked The Fuel Pressure Checked The Egr Valve Looked For Vacuum Leaks And...

Can't Figure This One Out I've Replaced Wires, Plugs, Ingtion Coil And I Just Bought Capp And Rotor If This Doesn't Work I Don't Know. I...

About Seven Months Ago I Had The Same Code Come Up (random Misfire And #2 Cyldr.) After About Another Seven Months Of Sporadic Diagnosing It...

I Am Still Trying To Diagnose The Above Codes, And One Of The Possible Issues Is A Bent Valve. This Would Be A Rather Expensive Fix, But...