P0300/ P0302 random misfire 2003 Toyota Corolla diagnostic and fix ( 🙏 donate if this helpped you)

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My clients 2003 Corollas engine was stalling, misfiring, and dying while the ac was on. hopefully this video will help a few of you guys out there with similar issues.

[@Kicsa]

I'll have to try this out this week. Got a P0300, P0303, and P0420....I'll definitely try your method for the first two codes, I suppose since my engine is dirty, the MAF might as well be dirty. Thanks for the video simple and straight to the point.

[@stgrsa]

Those are the exact codes I have on my 2000 Corolla right now. Black soot is making the bumper above my tailpipe black and cleaning my throttle body carbon helps. Were you able to figure out a fix?

[@mikezarate1727]

Thank you so much for helping me. New spark plugs didn’t fix it, but I get the coils tomorrow.

[@DFRxSTANCE]

Michael Zarate reply with your results bro let me know if you need any help.

[@mikezarate1727]

Built 2 Drive , I followed your exact guidance and the results were flawless. Thank you for showing me how easy it can be. I saved a lot of money and stress thanks to you. I really appreciate you and this video.

[@bluewave7120]

A big thumbs up for this video! My 2000 corolla started running rough and pulled a po300 TY for the fix!

[@DFRxSTANCE]

Glad i could help bro. Pleas sub if your into this type of content

[@bluewave7120]

@@DFRxSTANCE just subscribed.and.looking forward for to more videos

[@ZPDSurvival]

Great Video. Who would have thought PPE would be so important these days. Cheers man. Working on my Corolla today.

[@ZPDSurvival]

I went to the Junk yard and got a set of coil packs. Autozone had the NGK Plugs you were talking about and I bought a can of mass air flow cleaner. Did everything and at first the car did not start. Checked the fuel cap also because of a P0446 Code and then it started. Very Peppy! Thanks Bro. Cheers, Subscribed.

[@DFRxSTANCE]

Thanks bro appreciate and i guess i had notifications off now its all on sorry for the long reply

[@ZPDSurvival]

@@DFRxSTANCE All Good. Thank You So Much. This Car is Awesome. Replaced the Gas Tank Also. Cheers. Happy 2022.

[@DFRxSTANCE]

Thanks bro

[@bravewilliams9856]

You are an excellent teacher, superb video! Thanks, I am sure you are going to save me many $$. Apreciate it.

[@pops9190]

Well done, I'm into the job right now thanks for your guidance.

[@Alexmechanic559]

Nice diag/ fix

[@DFRxSTANCE]

Soy Karma thanks brother

[@janishacastille5045]

Great video.. very nice..thank you.👍

[@ChicagoBulls2007]

Same P0302 and P0300 misfire and engine shakes like the video on my 2000 Celica GTS 2zz engine. I replaced the fuel injectors, PCV hoses, spark plugs, denso coil packs, MAF and cleared the codes. Car idles OK and then misfires and shakes the same was as this video. Any other ideas? The seller that sold me the car did mention thjs happened shortly after putting in Costco gas (premium) Bad gas? Filler/fuel pump? He’s also changed the valve cover gasket and orings (spark plug seals) too

[@DougHinVA]

You may keep a Toyota another 20-30K miles and platinum plugs will do that job well. Iridium is for very long life. My 2000 Corolla got platinum ones lately.

[@vyvanse70mg]

bro ur corolla is fucking beautiful i love white 8.5gen rollas

[@hassemsadiq]

Awesome video can a bad fuel injector cause check engine light to come on

[@DFRxSTANCE]

Yes it can

[@joshhemingway3099]

They definitely make those spark plugs FYI

[@shopslave5123]

Thanks dude

[@beexiong2171]

i dunno if u fixed it for sure.. i still the see check engine light on..

[@DFRxSTANCE]

It was fixed

[@beexiong2171]

@@DFRxSTANCE oh on the video during then end the check engine light can still be seen on...but if it was fixed great! now i gotta get my car fixed been at the shop for 2 days and they still have not figured the misfires yet....but i have hope the mechanic ase certified there will find the cause of it lols.

[@DFRxSTANCE]

Trye i drove it till it turned off i did not reset the light it was a clients car so i had gave it back then finished / edited the video

[@chrism8180]

To all the people in the comments throwing parts at their misfire. A 15 dollar code reader and googe will save you money

[@girohead]

I think that intro triggered a seizure! Just kidding. I've got a 2000 with renewed misfires. I suspected this but plugs are pretty new and coils not much older. I've been reading up and saw things about injectors or intake gasket (causing lean mixture). I'll try the MAF, coils and plugs first but it seems it could even be fuel - it really only happens on accel, especially when climbing or with A/C on. Suggestions?

[@DFRxSTANCE]

girohead i wanted the intro like those crazy Russians clubs hahaha. Let me know how it goes.

[@dealerauctionnightmare4689]

No diagnostics in this video. Just replacing parts.

[@DFRxSTANCE]

Cool

[@joemccrary2917]

What kinda cleaning spray u used on the sensor?

[@DFRxSTANCE]

Mass air flow sensor spray

[@lukabrazi2179]

What if brake lights won't turn off even when car is off???

[@DFRxSTANCE]

Sorry for the long reply notifications were off hope it worked out for you

[@mxkcrm]

Plastic clip broke that makes contact with your brake switch (top of the brake pedal and you'll find it)

[@glendonbenoit5766]

Hey so what was the problem with the misfire have the same problem with mine thanks

[@DFRxSTANCE]

Glendon Benoit could be did you ever get it fixed?

[@starwart]

my 2001 toyota echo had a bad upstream o2 sensor. it made my car misfire like crazy. i was able to isolate the misfiring problem to that o2 sensor by unplugging the wire harness to the o2 sensor. when unplugged, it drove perfect-- no misfiring. i didn't know a bad o2 sensor could make a car run so terrible! i will leave it unplugged until the new one i ordered arrives (permanently leaving it unplugged would permanently affect my MPG...) hope this helps someone else with their random misfire!

[@dicksonnjuguna8620]

Why NGK plugs don't fit some Toyota engines

[@twinkiissb]

I'm gonna try this out on my 03 corolla because mines has the same code and has been rumbling like a washer machine. I'll post an update later.

[@DFRxSTANCE]

TwiNkii please do id love to hear your results

[@ianmatthew6689]

Mine has misfire on all cylinders new plugs and tested all my injectors still runs like shit

[@DFRxSTANCE]

Ian Matthew what car year make and model

[@starwart]

my 2001 toyota echo had a bad upstream o2 sensor. it made my car misfire like crazy. i was able to isolate the misfiring problem to that o2 sensor by unplugging the wire harness to the o2 sensor. when unplugged, it drove perfect-- no misfiring. i didn't know a bad o2 sensor could make a car run so terrible! i will leave it unplugged until the new one i ordered arrives (permanently leaving it unplugged would permanently affect my MPG...) hope this helps someone else with their random misfire!

[@joshhemingway3099]

P0302 code with no start. Any ideas?

[@PeterFeederHQ]

RIP spark plug with impact🤦🏻‍♂️

[@DFRxSTANCE]

300ZXXX lol what haha. Were loose already lol i broke them free with a ratchet first then impact after theirs no force from the impact and i always hand tighten. But thanks for the comment 🙏🏽

[@austindacosta6498]

@@DFRxSTANCE learn how to correctly install the plugs before you break something buddy

[@DFRxSTANCE]

@@austindacosta6498 never broke one in my life also off camera they were broken by hand and tightened by hand 🤚🏻 thanks tho have a great day

[@DFRxSTANCE]

@@austindacosta6498 its funny how you dont see whats edited out on a video right?

[@4bvenom733]

never use a power tool to loosing the spark plug cause you never know you have a very tight spark plug it will break inside the block. I replace all 4 spark plug to NGK Laser Iridium and clean the hell out he Mass Sensor really good didn't solve it. Now I have to order me a new MAF Sensor smh

[@DFRxSTANCE]

I broke them free with a ratchet then i used a m12 ratchet to remove them bro. Hopefully you figure your situation out.