P CODES (POWERTRAIN) P0300 - P0399

Hello I've Got A 2001 Nissan Altima With How Do I Go About Finding The Problem And Rectifying It? I've Changed The Intake Gasket...

01 6.0 In A Yukon Xl. Cyl #2 Misfiring. Parts Changed/checked ; Head Gaskets, With Valve Job. Coil. Plug Wire. Plug. Injector. Fuel Psi Reg...

I Need To Know How I Should Go About Fixing The Issue, Considering I Am Going To Be Repairing It Myself. What Are My Options And Price...

Code Says Cylinder 2 Misfire. Changed Plug Wires. Still Same After I Cleared The Code. Now Moving On To Coil. What Else Can I Do Or Look For...

Hi I Was Just Leaving My House And The Check Engine Light Started Flashing And This Code Is What Came Up. I Was Wondering What I Can Do To...

Truck Is Running Lean, But Drives Good. Starts Acting Up When I Am Going Slow And In Idle But Not All The Time. I Have Replaced Fuel Tank...

Ok I Started With The Basics, Fuel Is A Solid 55-60 Even Under Load Driving. I Diagnosed The Ignition Module As Bad (had It Tested) Failed...

Engine Performance Problem 2004 Chevy Malibu 4 Cyl Automatic 78,000 Miles I Changed The Spark Plugs And I Still Am Getting The Misfire...

Just Replaced Head And Did Complete Tune Up And Don"t Know Where To Go Next? Car Has Random Misfires On Idle Updated 2-5-09 Already Did...

My Auto Has Engine Lite On And Has Po300 Code I Need To Check The Fuel Pressure But Dont See The Check Valve To Hook Up To It. Also I...