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1-9 of 9 Results
  1. Chevy Silverado Forum (GMC Sierra)
    Hi all! Hopefully there is someone out there that can help me! I have a 2006 Silverado w/t 4.3L v6. I've been trying to diagnose a random / multiple misfire code for a few weeks now and have exhausted all my options (at least all that I know). The truck will start, run, drive, then randomly lose...
  2. Medium-duty Truck Forum
    I have a 1990 Kodiak with the 7.0L TBI, air brakes as it is a dump truck. I'm the mechanic at our company, heavy truck/equipment to be exact, but I pretty much know how to work on everything. The truck was out working with the crew when the boss called me saying the alternator gauge was pegged...
  3. Chevy C/K Truck Forum
    I bought a 1998 Silverado 2 days ago knowing it had some “misfire” problems but I didn’t know the causes, I’ve replaced the rotor cap and rotor and nothing really changed, sometimes it take 3 cranks to start up and sometimes it fires right up. I’ve put a video of it running, it won’t go past...
  4. 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...
  5. 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...
  6. 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...
  7. 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...
  8. 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...
  9. 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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