Subaru Misfire Repair | How To Fix With One Tool Only!

Рет қаралды 184,032

Күн бұрын

This is a 2010 Subaru Impreza with 150k miles. It recently developed a misfire for cylinder one. This is how I diagnosed the problem in less than 10 minutes. Certainly something many of you can do at home. Cheers.
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This being a four cylinder box engine, there are four possible misfire codes:
Subaru P0301 - Cylinder One Misfire
Subaru P0302 - Cylinder Two Misfire
Subaru P0303 - Cylinder Three Misfire
Subaru P0304 - Cylinder Four Misfire
Chances are the misfire is due to a bad or worn ignition coil, spark plug wires and/or spark plugs. If all look okay with spark, then check the fuel injector. If everything checks out, then a compression test or, even better, cylinder leak down test would isolate the problem.
Note:
Any attempt to repair automotive parts and/or systems carries risk of personal injury. Always adhere and follow safe practices when working on vehicles. Such as, safety glasses, jack stands, no loose clothing, etc. No guarantee or warranty is implied. Use the information in this video at your own risk. Carsntoys is a member of the Amazon Influencer Program.
Publication, reproduction or distribution of this film is strictly prohibited.
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#subarumisfire #misfire #Subarurepair

Пікірлер: 123

@paul48 3 жыл бұрын

I have been doing my own work on cars for a few year now, but I was still able to learn a lot from this video. Very good information, and well presented.

@CarsNToys 3 жыл бұрын

Great to hear!

@mohabatkhanmalak1161 3 жыл бұрын

We really appreciate you bringing us these Subaru diagnosing and repair clips. Thank you.

@doranvee5944 2 жыл бұрын

Superb teaching video. I have never used a multimeter, but you going through step by step makes me think I can do it. Thank you so much!

@drake.debars 3 жыл бұрын

Fantastic video! A lot of people can benefit from this. I’m glad I clicked on the first recommended instead of scrolling down like usual

@aTROLLwithBlades 3 жыл бұрын

Thanks man! Great video! And not annoying or in terrible quality! A very rare find on KZfaq in this age of clickbait

@o.c.stiggs5377 3 жыл бұрын

Thanks for an exceptionally well-done and useful video.

@DavidS-iq4oo 3 жыл бұрын

Thanks a lot! I have an 09’ impreza and my sister actually has a gen 3 TL so I will definitely be binge watching your channel lol. Great stuff 🙏🏻

@doranvee5944 2 жыл бұрын

Me too!

@slack757 2 жыл бұрын

What a great video. The video is well done, easy to understand and very easy to follow. You pretty much cover everything one would get on a misfire.Thank you for saving a ton of time.

@paddler-sn7ub 2 жыл бұрын

Many Many thanks, I always forward to watching your very informative videos. I’m 100% sure it saves money that could be spent on the family.👍🏽👍🏽

@kcole-xu8nm 2 жыл бұрын

Thank you so much! I recently changed the spark plug for cylinder 1 and had no clue why I’d be getting a code for it 2 months later, going to avoid spending lots of time and money trying these out

@Nickdeltone Жыл бұрын

Great video. The spark plug wire test should be reading in the kilo ohm range. The wire you tested showed 5.21 k ohms or 5210 ohms.

@yachtwork Жыл бұрын

Really good how-to video. thanks for posting. Nice work.

@rrpawluk2 3 жыл бұрын

Thank you - very informative with so many ways to test. Would have been neat to check one other quick home test for wires, specifically if wire casing is damaged causing short. At dusk or in dark garage spray fine mist water on wires with car idling. It the wire is shorting or arching should see a spark at wire itself and/or a dip in rpms. Not sure how reliable but you def had a bad wire so would have been neat to see if shorting was obvious. Also good check if P0304 code seems to correspond with rainy weather.

@jesseullberg4217 Ай бұрын

Great straight forward video and not just scatter gunning parts at things.

@harlankraft578 10 ай бұрын

Thanks was checking the injector with a screwdriver and found was only a loose plug wire! Thanks for sharing the tips and tricks!!

@MrZbiggles 2 жыл бұрын

great video, well spoken and perfect camera angles. would hurt to mention what size sockets they are. Subarus are great cuz theyre usually 10,12, or 14 mm.

@nurivandominguez6244 2 жыл бұрын

Amazing video. Gracias for teaching.

@TheeJudge Ай бұрын

This video was very helpfull thank you

@jp5617 Жыл бұрын

My lucky day - just discovered your channel and have the same suby so will enjoy doing new stuff in addition to what I already did. In terms of design this is one of my favorite imprezas. I think this gen design is underrated for some reason. Glad there are people like you there appreciating them and keeping them in good shape. Mine is in France gen 3 R 2.0l model - having a big trouble finding ignition coils for some reason. Do you think that coils for 2.5 engine would fit on mine as they look exactly the same. I presume yours is more powerful model there in USA. In any case thank you very much for sharing your skills.

@christhomas7750 2 жыл бұрын

Great video very informative!!!!

@lawxr6eBay Жыл бұрын

Make sure to wear insulated gloves or carefully inspect the boots for splits/cracks First before Pulling on it Live- with vehicle Off. Pull on a Hot One that's cracked while it's running and get Cracked! Lol great help for simple diagnosis, Thanks!

@robtaft9139 11 ай бұрын

I just learned this the hard way...1" arc

@kinyosidennis4103 Жыл бұрын

i leaned a lot from the video thanks dude

@Mark-ks9jj 9 ай бұрын

Very informative video thank you

@577buttfan Жыл бұрын

great video bro lots of knowledge.

@uprailman 3 жыл бұрын

Like others , well done video. I have forester that all of a sudden while driving started running rough. No check engine light. Go figure. Thought these things knew everything about the car.Any comments

@theplageragexb1391 27 күн бұрын

Dude, i love you!

@ronaldgreer8097 2 жыл бұрын

great video. what if you have an intermittent misfires/stumble but no code error?

@TheStrider138 2 жыл бұрын

Thank you!! Super helpful!

@yehtutnaung7164 3 жыл бұрын

Thanks for sharing

@JamesBond-gb1do 3 жыл бұрын

You have one of the most detailed videos on problem solving Subarus. 👍's up & a Sub

@ArmoredCore5000 Жыл бұрын

Great video, thank you!

@Blue_devil_209 11 ай бұрын

Dude great Video.

@dalebechtel8904 2 жыл бұрын

Great video

@atypican Жыл бұрын

Great video. Thank you.

@crazyDIYguy 2 жыл бұрын

I love the ej253 intake manifolds. Not crazy about the newer black plastic ones.😐

@dfields9511 3 жыл бұрын

Great video there , I recall some you did before on a Nissan Maxima. Do u still have that car ? If not what killed it Transmission, accident , engine etc

@josesalguero3139 Жыл бұрын

Great video thank you very much!!!

@MsTheGamingBro 3 жыл бұрын

Really helped me out for my own Subaru thanks a lot, I have 4 codes coming out of my OBD2 and it's for cylinder 1&2 so I guess I need to work of that

@user-gp1qu2sd1p 11 ай бұрын

Well said everything! Thanks!!!

@TheHandyHippy Жыл бұрын

Nice! Thank you!

@maciekmurano Жыл бұрын

Just an excellent video i typs

@robinmceachern1911 Жыл бұрын

Here you are round 2 week 2 saving me more money. Just finished my transmission cooling lines. Everything works perfectly. Now I’m solving a miss fire problem. Let’s hope you have something for the airbag light for when I get there 😂

@KB-ie7jr Жыл бұрын

Could be totally unrelated, but for certain '03-'14 Subaru models a Takata airbag inflator recall was issued for the front pass. side

@robinmceachern1911 Жыл бұрын

@@KB-ie7jr thanks buddy definitely relevant. Going for my break lines and air bag in 6 months they have it on back order.

@Kradle 2 жыл бұрын

Does polarity matter when connecting your multimeter to the injector? Thank you!

@mintpatrol3319 2 жыл бұрын

I may have just missed it but whats the bolt size for the metal plate covering the fuel injectors?

@gizzyguzzi 2 жыл бұрын

Does a wet plug mean the injector is working? Or can it overfuel? Had the P0301 and bad miss. But after gapping plug and checking the wire, and still throwing the same code, suddenly miss went away and not throwing the CEL. I'm guessing coil but haven't tested it.

@sicklecell9999 2 жыл бұрын

THANK YOU! I'll try this next. I have gas leaking into my oil, a lot. My injectors all sound like they're click'n/working fine. No smoke out of exhaust, no 'check engine' lights, car starts & runs ok. maybe it's not getting spark on a cylinder??

@undertaker6fd 2 жыл бұрын

Probably won't see this since it's an older video but would the process be the same if you are only getting a misfire when the AC is on? My 2006 WRX runs great but within 5-10 min of running the AC I get a cylinder 4 misfire.

@Mrjonblakely 2 жыл бұрын

You said 11 ohms @14:40 on the coil, I think you meant 11k ohms. Thanks for your video.

@stephenhurd1489 2 жыл бұрын

I'm sure u meant well but what about the shock from the plug wire when the engine is running!

@jamesdodds3195 3 ай бұрын

I have a p0171 only, think it might be a spark plug or a vaccume leak near the cylinder?

@LB-ge9yz 3 ай бұрын

I have the exact same Subaru and I also had my first engine blow a head gasket, destroying the engine. I put in a new remanufactured engine with better head gaskets and replaced everything else with new as well. Everything has run great except for periodic cyl 3 and 4 misfire codes. I have yet to be able to find the cause for it. 80,000 miles later and I am still getting the cyl 3 and 4 misfire codes periodically. Not sure what else I can test or how to go about testing internal mechanical issues.

@mrfester42 2 жыл бұрын

If the injector test shows the correct resistance reading, is it still possible that the injector may be clogged and thus still not functioning as it should?

@valireklaam Жыл бұрын

If the injectors are clicking consistently with the screwdriver test, then the ohm resistance test can still show other errors with the injectors, correct?

@gomirlez 3 жыл бұрын

Hello, mr subaru!!! I have a 2011 outback with 140.000 milles and I recently put a fluid injector cleaner in to the gas tank( i put half of bottle LUCAS BRAND) the next day my car started to shakes and loose power, also the check engine light turns on, the brake light is on, the cruise light is on and the vehicle dynamic control warning is on…. Some videos on KZfaq says it could be the gas cup or the parking brake light switch….. I CHECK THIS ALREADY AND THE ARE GOOD…. Do you think the injector cleaner DAMAGED the ignition coil or the spark plug or the injector???? Thanks again for letting me know, i subscribed to your channel to watch all the videos you have… the will help hound people like me….

@kb1qzh Жыл бұрын

Wish I saw this last year (P0301 and P0302}I've already gone through coil/wire/plug replacement with the dealer. I have my Fix at a Subir shop for a second opinion. The current thought is the fuel pump.

@markdiffendal4202 Жыл бұрын

Does the code always tell you what cylinder? I have a 2011 Legacy 3.6R and my mechanic says the code just says cylinder, not which one

@torkrench Жыл бұрын

gotta test the primary windings of coil as well

@gunnarlarson4677 2 жыл бұрын

Check engine light came on yesterday with a P0301 code. So does that mean I only have to worry about cylinder 1 or should I check the other ones as well? Also this was probably one of the most helpful car fix KZfaq vids I’ve ever seen.

@justinhalvorson7571 2 жыл бұрын

Cylinder 1 is ur problem

@traviswillis5559 Жыл бұрын

I’m looking a buying an 97 outback with a misfire. It’s got about 180k miles and it’s auto. How likely do you think it is to have blown a head gasket. The owner isn’t mechanically minded and they don’t know the engine light code, or if it uses water etc.

@Yk-fkiign1 2 ай бұрын

My car is doing the exact same thing in this video I replaced my spark plus just not the wires yet I also changed the MAF sensor still misfiring all 4 cylinders please help.

@StanTheMan-us3tp Жыл бұрын

Similar issue, What if the wire is arching when you remove it? Does this necessarily mean the wire is working ?

@taurinediamond1069 Жыл бұрын

My 2004 Forrester XT is misfiring on all four cylinders at high RPMs. It'll throw 8 codes, each for each four cylinders twice. I've replaced the spark plugs and the fuel filter and I still can't find the problem. I was hoping maybe someone would have some input.

@gbsk12 5 ай бұрын

I put new plugs wires and coil pack in and the injectors are good and I still get a P0301 reading What do I do now? It still does not run good when I get a load on it

@lv2fishrn971 7 ай бұрын

I have issues on cylinder 4. I have replaced plugs wires and coil pack. I have 238k miles. Maybe time for a new injector? Or maybe the wire harness that pluggs into side of coil pack is damaged?

@arieswrld5536 6 ай бұрын

i’m having the same issue right now! Did you end up figuring out the problem?

@saefhindi6184 3 жыл бұрын

Thanks for this helpful video. Appreciate it. I got 2010 Forester N/A engine. Had new spark plugs and wires, clean mass air flow sensor, new air filter. but still have what i call it ""detontation" when press gentle on gas peddle only. It goes away i put gas 94 octane. Otherwise will happen if put 91 octane or less. Any suggestions pls ?

@JaguarDieCast 3 жыл бұрын

Sell it and buy a Toyota

@mohabatkhanmalak1161 3 жыл бұрын

Does the "Check Engine" light come on? Then it should give some code(s) and you go from there.

@o.c.stiggs5377 3 жыл бұрын

Perhaps carbon deposits are causing increased compression ratio.

@saefhindi6184 3 жыл бұрын

@@mohabatkhanmalak1161 No engine light on. Engine accelerates just fine based on the age and mileage of car (280k). No losing oil. I am just worry if needs engine repair or may be take it for Tera clean service for any carbon build up

@Nbomber 2 жыл бұрын

Probably carbon buildup. Something in that cylinder is getting too hot. Could be so many things. Valve not seating properly, and thus getting too hot, or an injector worn out and not providing enough fuel. Or carbon buildup. Id look at the injector first since its easiest. Get it out, clean it up or replace (usually requires ecu programming for calibration) and see what happens.

@nelnutta1055 2 жыл бұрын

I am having the same issue with a misfire P0301 Cylinder one. I did the beginning part and verify if there was something wrong with the motor unplugging the plug which it it changed the motor's idol So I believed it to be working correctly. I have tested everything you have stated and all seems in good working order. If your coil pack plug wire spark plug An injector is good What would be the next step if you're still getting A code for miss fire?

@nelnutta1055 2 жыл бұрын

My motor was also pulled out recently had head gaskets and a valve job that has all new plugs and wires.

@Americansikkunt Жыл бұрын

@@nelnutta1055 I’m in the exact same situation. What ended up causing the misfire? Fuel injectors? Burnt valve?

@klum8872 3 жыл бұрын

I had a cylinder one misfire. So I changed spark plugs and wires. Then after pushing some gas, all cylinders misfired. So I replaced the coil pack. When I replaced the coil it wouldnt start. But then I got another coil. Lights off again. If it doesnt stay off ill check injectors. But so far so good.

@VictorioLopes 2 жыл бұрын

How did it go, tho?!

@SmittyEh. 2 жыл бұрын

Just because it's new doesn't mean its good. shame you got a new faulty coil the first time.

@theoriginalmungaman 3 жыл бұрын

Can’t the injector read correctly but still be bad?

@RIPdBOON 3 жыл бұрын

Great video. I have an 04 Legacy with cylinder misfire on 1 & 2. I was warming up my car when the engine started to shake and the check engine light started flashing. I also noticed the Catalytic Converter was glowing red hot. Any idea what could be causing this?

@nonenone6937 3 жыл бұрын

You answered your own question

@RIPdBOON 3 жыл бұрын

@@nonenone6937 started with a tune up. Spark plugs and wires and ignition coil and she purrring again. Thanks tho 🤙

@lauriergauthier5368 3 жыл бұрын

you could have 2 spark plugs mixed up as well

@RIPdBOON 3 жыл бұрын

@@lauriergauthier5368 I just went ahead and replaced all spark plugs and the ignition coil and she's been running great ever since. I know a lot of people talk crap about the boxer engines, but I didn't think it was that bad of a fix.

@lauriergauthier5368 3 жыл бұрын

@@RIPdBOON I wish i could say that about mine I have spark on one cylinder and it won't start. what baffles me is i only have spark to one cylinder when it is a wasted spark system

@luisrojas4517 2 жыл бұрын

I have Subaru Impreza WRX STI 2008 no turbo problem is star in off mechanic no find the problem

@chadharris5072 2 жыл бұрын

Spark plug tube seals leaking oil onto plugs and plug boots is a common reason for a subaru to misfire.

@pitviper7924 8 ай бұрын

I am a retired electrical engineer. Through my whole career, if I needed to fault find with electricity, the multimeter was the most used. The oscilloscope was second. For this type of trouble shooting, a cheap Harbor freight multimeter will be sufficient.

@pansaint2662 2 жыл бұрын

I have a 2012 Subaru Forester 4 cylinder I did 4 4new spark plugs and 4 new coil packs only codes I get is a permanent misfire in all 4 cylinders I checked all hoses and replaced throttle body and still misfire in all cylinder ?? Help does anyone know what the problem is?

@cedric5323 2 жыл бұрын

Check the coil pack. Each coil wires go to the coil pack. Unbolt it and check for continuity. There are youtube videos showing you how to do it

@paddypointhound1688 2 жыл бұрын

my subaru runs great til it warms up?...help!ps your vids are very informative as well...

@cedric5323 2 жыл бұрын

I'm not a mecanic but from the research I did, I would check the EGR valve "exhaust gas re-circulation"

@bobhunter9439 3 жыл бұрын

Any advice for a choking 2015 Outback 2.5l. No error codes or engine light coming on? It chokes only at around 1500 rpm's. it's not the PCV valve, that's new.

@GSmith-je4gl 2 жыл бұрын

Let me know if you got this resolved. I have the same car & same problem.

@GooseBumppps 3 жыл бұрын

What does it mean if I have misfire code but when I pull the wire the engine does begin to shake and stutter

@Nbomber 2 жыл бұрын

It means the misfire is probably intermittent.

@GooseBumppps 2 жыл бұрын

@@Nbomber yes my check engine light goes away sometimes does the point to any certain issues

@Nbomber 2 жыл бұрын

@@GooseBumppps tbh, I wish I knew.

@michealmeaden1300 2 жыл бұрын

What if my coil packs are not numbered, any way to tell witch goes where

@michealmeaden1300 2 жыл бұрын

Someone Answer this need help

@cedric5323 2 жыл бұрын

There are 2 long, 2 short. 2 long go to cylinder 2 and 4. 2 short go to cylinder 1 and 3.

@michealmeaden1300 2 жыл бұрын

The front ones have a different color connector to it

@iBLaCKOuTxZ 2 жыл бұрын

I have a Misfired cylinder P0304 those that mean its a ignition coil or the wire?

@cedric5323 2 жыл бұрын

Could be a lot of things. Bad injector Bad coil Bad wire Bad spark plug Bad coil pack Bad cylinder compression Bad fuel pump Bad MAF sensor Air leak Bad EGR valve Pretty much anything that has to do with air/fuel mixture and electricity.

@user-gp1qu2sd1p 11 ай бұрын

Bank 2? Where?