P0304 Cylinder Misfire | Troubleshoot Engine Misfire Problem

In this video I will show you how to troubleshoot and diagnose a cylinder misfire problem in your vehicle. This problem is caused by either an issue with the ignition coil or spark plug. You will get an error code P0301, P0302, P0303, P0304. The steps to troubleshooting this is quite simple and you can do it yourself. I will show you the troubleshooting steps in this video.

======
TOOLS
Autel MaxiCOM MK808BT OBD Scan Tool (Bluetooth Wireless)

1/4” & 3/8” Socket Set - 69 Pieces

Spark Plug Gap Tool

NGK SILZKR7B11 Iridium Spark Plug

3/8" Torque Wrench (5-80 ft-lb)

3/8" Electric Ratchet

=======
Shop Dial2Fast Store For List Of Tools & Parts

=======
If you need VPN, get TORGUARD
50% Off Code: dial2fast (does not expire)

=======
Support Dial2Fast on Paypal

Support Dial2Fast on Patreon

Dial2Fast website

Like us on Facebook

Shop Amazon

Join Amazon Prime

Try Amazon Prime 30-Day Free Trial:

========
As an Amazon Associate, I earn commissions from qualifying purchases with the links provided here.

[amandam]

Awesome video! I ended up needing a new spark plug and the error is gone! whoohoo! Thanks for the help :)

[michaelforsythe]

Nice. Even new parts can fail, great troubleshooting process

[pebbleslove]

Is there a more serious problem if this happens more than once afrer replacing 4 cylinder coil within 6 months time???

[jimrichards]

Very helpful video and great explanations thank you for your time on this I appreciate it

[notfound.....]

Excellent video, just a pro tip though you don't have to do an auto scan, you can do a manual scan and just bring it over to diagnostics for engine. I have the same autel but it's the mp 808. Also don't forget a little bit of dialectic grease to go on the end of the boot before you reinstall back to the spark plug.

[frankdillon]

there many complaints where people purchase fake NGK iridium plugs off the internet. where did you get the plugs?

[papertowel]

Smart troubleshooting, many many thanks.

[jcravatt]

mine was an newer ignition coil- luckily had a few original coils lying around

[i-ammoney]

I have this code P0304 I replace the coil oack and the spark plug. Still miss firing. Maybe I got a faulty coil oack or spark plug. This is driving me nuts!!

[clench]

Sir what specific tool do you use to take out spark plug?

[Dylan-kwol]

Hope you had a Merry Christmas and a Happy New Year

[waterview.]

excellent video. Help me a lot. Thanks.

[buddyboyx]

When you first checked after switching the coils, surely the fault code from before would have showed until you erased it then scanned again, as you did with the spark plug later?

[JR-ygjv]

I have a question sir i’m having the same issue with that code p0304 I replace all spark plugs and I replaced all ignition coils and the light is still on with that same code what else can it be? Thank u

[Alex-ficb]

Wow.thank you.thank you.and very thank you of your intelligence genius thought for found out what engine misfire.again thank you.
Can you please tell me.what it the name of obd scanner.and where did you bought it.?

[bruciferknight]

I have changed both ignition coil and spark plugs but i get a misfire when the car is tilted

[ivansebugere]

My question..is...do i need to replace all the 4 spark plugs...or i just need to replace the one misfiring...

[wildwolf]

What’s the scan tool that are you using?

[nazgeebowe]

Torque setting to install spark plug on the Elantra GT…???

[MilwaukeeMarco]

First off that's a Hyundai it's going to run rough anyway😂