Chevy Silverado P0304 MisFire Code - Bad Spark Plugs?

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On today’s episode of DIY Willy we try to fix the 2011 5.3 Chevy Silverado. The ECU showed a check engine light code P0304 and was angry, The truck had a rough idle but ran ok. So in this video we will change the spark plugs and hopefully clear the misfire on #4 cylinder.
So follow along as we continue to repair and upgrade our 2011 Chevy Silverado.
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Tools Used:
FoxWell NT201 OBD2 Scanner Code Reader….amzn.to/43BGMX1
NGK Laser Iridium Spark Plugs….amzn.to/3IWhwB8
5/8 Spark Plug Socket….amzn.to/4cBfnbK
Dielectric Grease….amzn.to/4cQmjC7
Spark Plug Terminal Pliers….amzn.to/4cutKOW
3/8” Heavy Duty Flexible Rachet (Pittsburgh Pro)…. amzn.to/3Tw3wD6
½” Drive Ratchet….amzn.to/4a5dS3T
3/8” Drive ¾” socket….amzn.to/3TWGQNC
½” Drive ¾” Socket….amzn.to/3vuiyRV
½” Drive 18” Breaker Bar….amzn.to/3VJZxFT
Plug Wires….www.autozone.com/ignition-tun...
Bi-directional Diagnostic Scanner….www.amazon.com/dp/B09XV8VR35?...
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You can reach me at: diywilliyprojects@gmail.com
Filmed with a GoPro Hero 9 Black
Edited with DaVinci Resolve Studio 18.6
Disclaimer: Please do not try to re-enact or recreate anything you see in my videos.
DIY Willy does not take any responsibility for injuries or equipment failure created by doing so.
These videos are intended for entertainment only.
#ChevySilverado #Sparkplug #NGK #Launch #Scantool #mobil1 #Coldairintake #5.3 #LS #AIRAID

Пікірлер: 20

  • @DIYWilly
    @DIYWilly3 ай бұрын

    Happy Easter!! Mrs. Willy say no projects today. Today is a day off.

  • @ocotillooutlaws4101
    @ocotillooutlaws41013 ай бұрын

    Great video! Really like the trouble shooting and explanation of the job! I had to put tape over my aftermarket stereo alarm it was to loud also. That record button plays hide and seek with me too 😂 Happy Easter 🐣

  • @heathenprojects2639
    @heathenprojects26393 ай бұрын

    I had to replace front def and hole front end on my 2500 new trans a t case almost a new truck but all in all still cheaper then a new one good stuff Willy

  • @DIYWilly

    @DIYWilly

    3 ай бұрын

    Oh yes definitely cheaper than a new truck. I’ll keep this one going as long as I can..

  • @Lou-eye
    @Lou-eye3 ай бұрын

    I had a misfiring '98 dodge ram, if you watched the engine running at night in the dark i could see arcing out of the spark plug wires where they were close to the block, got some good aftermarket wires and cured the problem. But 13yr old plugs i wouldn't trust.

  • @DIYWilly

    @DIYWilly

    3 ай бұрын

    Was definitely time to change the plugs. They’re said to last 100k but honestly I should have changed them sooner. I noticed a rough idle starting last year.

  • @ohio_thunder83
    @ohio_thunder8316 күн бұрын

    I have the same code on my 2010 Nissan versa. I also have a hole in my exhaust near the upstream(air/fuel ratio) 02 sensor and have been getting a code for the o2 sensor as well. Could the O2 sensor issue be causing the misfire?

  • @DIYWilly

    @DIYWilly

    15 күн бұрын

    No wouldn’t think so. You should get the hole in the exhaust plug welded. That may correct the O2 sensor code. Try the simple troubleshooting for the misfire. Move the plug and coil to different cylinders and watch the code. My guess is you have a tired coil. Thanks for watching!!

  • @KentuckyFriedFixes
    @KentuckyFriedFixes3 ай бұрын

    Good one! This reminded me it's time for some fresh plugs in mine too. If the coil isn't too pricey, I'd replace it. I'm planning on replacing the coils on mine when I do the tune up, but it's only a 5 cyl GM and the coils are cheap for those. Your engine sounds good to me. I didn't hear any misfires at all?

  • @DIYWilly

    @DIYWilly

    3 ай бұрын

    Yes the engine is definitely running smoother since replacing the plugs. I moved the coil but the misfire stayed with #4 so not sure what that means. I believe the coil is fine.

  • @KentuckyFriedFixes

    @KentuckyFriedFixes

    3 ай бұрын

    @@DIYWilly I wonder if it may have a little carbon build up on the valves or seats in that cylinder? A good dose of Sea Foam is never a bad idea regardless IMO.

  • @DIYWilly

    @DIYWilly

    3 ай бұрын

    I would much rather there be carbon buildup than a damaged lifter in the AFM system.

  • @KentuckyFriedFixes

    @KentuckyFriedFixes

    3 ай бұрын

    @@DIYWilly Amen!

  • @vicvasquez8554
    @vicvasquez855429 күн бұрын

    was it a fuel injector

  • @DIYWilly

    @DIYWilly

    29 күн бұрын

    Hello Vic, No it was the spark plugs. I’ve already changed the fuel injectors when I had the 219A code. Thanks for watching!!

  • @vicvasquez8554

    @vicvasquez8554

    29 күн бұрын

    oh ok thank you yea i have that same code right now on a 2015 sierra denali 6.2 trying to figure it out

  • @DIYWilly

    @DIYWilly

    29 күн бұрын

    This is where it can get scary. We all know about the AFM/DOD problems with these engines. I hope this is not the problem you’re having. Thanks for watching!!

  • @StarknightMT_official
    @StarknightMT_official3 ай бұрын

    Hello, Are you interested in testing our products? We would like to invite you to test the Air Vent Windshield for your Polaris RZR XP 900

  • @DIYWilly

    @DIYWilly

    3 ай бұрын

    Hello, Normally I would say that I’m interested in testing your products. However my Polaris RZR project is a body swap and will no longer use many RZR type products. Thanks for watching!!

  • @StarknightMT_official

    @StarknightMT_official

    3 ай бұрын

    @@DIYWilly OK, thank you for your kind reply. Have a good day!

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