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misfire

  1. Chevy Silverado Forum (GMC Sierra)
    Hey guys and gals, Long time creeper, first time poster. I currently have a 2011 silverado 1500, with 163,622 miles on it. It's a 5.3 vortec engine. It smokes from the exhaust a light blue exhaust that's mixed with a grey/white exhaust. It stops smoking after roughly 10 seconds of running...
  2. Chevy C/K Truck Forum
    I recently found I had a misfire on cylinder 3, so I started by replacing all of the spark plugs and wires (the wires seemed to be OE). The 3rd cylinder spark plug looked in pretty bad shape but the misfire is still happening, when I start the truck sometimes it will start missing and the check...
  3. Chevy Silverado Forum (GMC Sierra)
    New to the forum and at a loss. Starting with a 2000 Silverado 5.3 275k never had an issue till about 2 months ago..started witha couple hard starts..then subsequent engine light indicator. Put an obd on it and got a p0300 random misfire. Changed plugs and wires since they were probably due...
  4. Chevy Suburban Forum (GMC Yukon XL)
    So a few days ago I went to start up my car and it was running about as good as a beached whale running a triathlon. So i used my code reader and got 2 P0300 codes which is random multiple misfire. I looked up the causes and parts that could fail (most of the parts on my engine are original) and...
  5. Chevy Suburban Forum (GMC Yukon XL)
    Ok I've got a 04 Z71 Suburban 3.5 inch lift 20" Motos you know the basic Southern Man's vehicle so I got to noticing after 2-3 days of not cranking the trucks battery would be dead so figured well fixing to be time to get a battery so we t got a huge gold top had to make it fit lol ok about idk...
  6. Chevy Suburban Forum (GMC Yukon XL)
    Hey all, going to throw this out there out of desperation. I can tinker on vehicles but I am not a mechanic by any means. Getting the p0300 code for random miss. I have replaced all plugs, wires, and coils before figuring out this code is misfire on random cylinders, so probably fuel or an air...
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