P0300 is one of the most common OBDII codes that occurs in the Chevy Trailblazer vehicles. It stands for: P0300: Random Multiple Misfire Detected. P0300 is certainly a cause for concern, and can be a threat to the drivability the Chevy Trailblazer. It will often be accompanied by codes P0301-P0308. 2004 Chevy Trailblazer misfire with codes P0300 and P0410 I have a 2004 Chevy Trailblzer. 4.2L. Three weeks ago it - Chevrolet 2004 TrailBlazer question. 19/07/2019 · 2004 trailblazer 4.2. was driving and lost power. unable to go above 2500 rpm engine light started blinking. pulled over, and towed home. Initial code was p0300. In the past, Ive had p0302 etc did some tests, replaced coil. Problem solved. This time. Similar tests came up blank. Searched for vacuum leaks. tested fuel pressure. Tested throttle.

ok i have one for you, i have a 4wd 2004 chevy trailblazer ls and i keep getting the code p0300 random misfire now ive had two mechanics look at it weve replaced coil packs spark plugs cam shaft position sensor everything more or less and it is still having issues like its stalling out or something. ive even used fuel injector cleaners nothing. 13/11/2015 · In order to be able to post messages on the Chevy TrailBlazer, TrailBlazer SS and GMC Envoy Forum forums, you must first register. Please enter your desired user name, your email address and other required details in the form below. Only letters, numbers, dashes and underscores are permitted for user names.

02/11/2012 · Trailblazer P0300 Misfire Repair. Unread post by 4Walt2 » Sat Oct 16, 2010 2:16 am If this is the 4.2 L straight six cylinder engine, a very common cause of misfire is a bad ignition coil, and/or spark plug. They usually break down under heavy engine load. Hi, I am a one-owner of a 2004 trailblazer 6 cylinder. I have been having a problem with missing and rough idle. The problem has been gradual and getting worse. The service engine light stays on and intermittently flashes when the miss is really bad. I have had a tune up.

P0300 Random misfire Random misfire is where it cylinder is not contributing, You have 6 ignition coil and 6 cylinders, when the misfie is random 2 or more are not contributing to the engine so would be running of 4 cylinder or sometimes 5 cylinder depending on what the cause of the misfire is. P0300 CHEVROLET Tech Notes The P0300 code means that a cylinders is misfiring or is randomly misfiring. Start by checking for intake leaks, intake gaskets are.