Yes, that put me one step ahead of the the game when one doesn't have the extra tools and tech to diagnose the spark plugs and/or coils! Good job on this video!
Thanks. I was too concerned about what it could be. Now that I have your info, I'm planning to investigate before allowing some mechanic to rip me off. ❤
I'm sure an air or fuel leak would effect all cylinders too. I geuss he is assuming you have a diagnostics kit which gives the code p301 which is misfire in cylinder 1. Hope that explains 👍
Another thing that can cause a misfire is loose camshaft bearing caps. I had a P0302 which every single garage failed to diagnose. I took the rocker cover off and every single bolt could be unscrewed by hand. Tightened up the bolts in sequence and the misfire went away, I spent money on a coil pack, spark plugs, fuel injectors, and compression tester for nothing. Compression was perfect so it's one to check people.
@@ChrisSRT_. bro i changed the spark plugs and changed the ignition coils and changed the fuel injector and still have the same code and same exact issue
I had my car just stop running 3 days ago I noticed oil around my coil in number 1 and found it was burnt as well as the plugs. Thanks for these videos as a chick it's always a RIP off going to a mechanic RU-vid has saved me thousands of dollars. Thank you again for the videos!
I am having a same problome . Code p0301 celender 1 missfire and oil around my plug 1 . survice center thold me to meke hole engine in 1000$ :( i am in big problome .
Thank you so much. you just saved me a ton of money. I put new plugs in my car and started to get the misfire cyl 1 code. it never dawned on me that the new plug was bad. Changed it for another new one and the car was fine. thanks again.
Auuugh.... I'm at a loss. the first time to check engine light came on the car died was sputtering I change the spark plugs everything was fine. We put a new gas cap and change the fuel pump. New air filter and cabin filter. We checked the ignition coils adding seafoam to the gas we checked for any vacuum leaks we cleaned the throttle and my car is still sputtering
With a rough running car it is always best to diagnose the issue first. Most of the time a quick scan of the car and getting the related fault codes will point you in the right direction. You are definitely on the right track to diagnosing an engine misfire/rough running issue, however due to the complexity of most newer automobile engines, you will need to find out what fault codes are being thrown then reassess. For example, if it is a fuel supply issue, you replaced the fuel pump but could have an issue on the injector side. This could be a leaking injector, dirty injector etc. Give it a scan and check faults.
@@dha588 Did the problem go away on its own? I’m asking to see weather water in the engine bay can create false alarms tripping this particular engine code for a false alarm.
Funny though. I had the worker at an Autozone run the engine check. He got this p0301 and wanted to sell me an entire ignition coil for about $90.00 Since I also have one of those, I ran a check myself. I have the p0305 and it turned out to be the spark plug.
Wow! So sorry to hear that happened to you. Glad you had a way to double check that scan though and get your spark plug back in working order. Happy and safe driving! 😊
Very nice. Easy to understand and very informative. Saving people hundreds if not thousands of dollars...depending on how crooked their mechanic is. Subscribed...now hopefully i don't need to come back for another video any time soon. Ahahaha. I know where to look 1st now if I have too anyway
Thanks man. Yeah, if one it's gonna get their hands dirty and the car is kina old, replace all sparkplugs, coils and most paramount, the upper air intake house and if splurge, a brand new MAF. All of these parts are pretty easy to replace.
0301 cylinder misfire does not mean you should start buying several parts. Means you should check that one spark plug first and that one plug wire first. Start with the basics.
This is a very informative video, unfortunately, my cylinder is misfiring and I needed to replace my coil and I had no idea what that was until I watched this video. UGhhhhh........
Geez, $1500 for a fuel injector+labor? I live in England, that's more than what my current car cost to buy lol If the repair costs for my car ever exceed the initial purchase, i just scrap it and get another preowned car. My £800 honda civic has been going strong with 183k miles for the last 4 years =P
Where Ami’s that Simple Fix you promoted with the title of this video.. and every other cylinder video which Btw Are all THE Exact SAME VIDEOs!! Wtf. How annoying and to be straight with you insulting.. as I didn’t hear any simple quick fixes. But a laundry list of somewhat difficult system checks which specialized tools are needed along with the experienced eye of a seasoned mechanic to point out the subtleties of the operation performed and what they are telling him about the misfires and there root causes.
2010 Buick Lucerne. I changed plugs 18000 miles ago. Car started to run rough. Progressively worse. Inniva scan tool said misfire on cylinder 1. Never got a check engine light. Not sure how that was. Basically checked resistance of plug wires. Cleaned mass airflow. Then found out it was a bad plug by swapping into cylinder 4 and it misfired there. Plug looked fine .
I had the same code switch the coil still getting the same code changed spark plugs still getting same code then I noticed oil on my new plug so I replaced the valve cover gasket, Its been one week still no check engine light hopefully that was it
I changed out all sparkplug and coils, two days later the light came back on. I did notice a leak on my oil gasket near the spak plugs. Maybe that's the issue
Great video and valuable information to use especially when you have to be your own mechanic like I am. If you want it done right you better learn how to do it yourself. 💪😎💪👍😁👌
So here's what I did, I swapped out the ignition coils from bank 1 and bank 2 clean them up with some brake cleaner and the cold went away. So is my problem my ignition coils? I already replaced the spark plugs and the control valve solenoids.
@@brandonrice2990 no he is not. fuel injectors do not start at 600 dollars and and coil plugs do not start at 200 dollars. even expensive stores like autozone don’t have prices like that
I have a 00 GS300 with only a P0301 code, ive replaced the spark plugs, wires, coil pack connectors. And i still have the damn misfire code n when i give it throttle it sounds like its breaking up. So im thinking fuel injector otherwise idfk
Hello everyone, so i have a 2008 Jeep wrangler that recently got that code. Mine has "p0301" I took it to a mechanic, turns out hes telling me i need a new engine because of it?... that i have low engine comoression and he gave me numbers between 130s.... i have no idea on what to do. Should i be concerned? I cant afford a new engine, none the less a new car. Can anyone give me their opinion?
Wrong my coil cost me $70 original part. And labor is like $20 which I believe is a waste when you can do it by yourself! It’s so easy and the spark plugs too
My 04 Prius had been a little off when coming to stops every so often (felt like a standard does when stalling). I thought it was the brakes at first, but kept driving since they were fine otherwise. after a couple weeks of daily driving (and a 2 hour trip over a mountain) I checked it and it threw this P0301 code, drove it to the auto shop and it started smoking on the way there. I changed my spark plugs and coil packs and it wasn’t smoking anymore, but then one day my check engine light came on. I checked and it still had the P0301 on. I’m sure there’s dirt in my fuel line after an attempt at taking the injectors out. I’m not sure what else to look for since it wasn’t the spark plugs/coils and the smoke and I dont have the means to tow it. The battery is currently dead and the last time I drove it, it started barely accelerating to my driveway and sounded very rough.
I have a 2012 Ford Escape XLT. Engine light came on. Firestone changed all my Spark Plugs, & Ignition Coils and did a Fuel System cleaning. Light still on. Then they changed out my Fuel Injector. Light still on. Lastly they replaced the Pigtails. Light still. After 6 tries @ Firestone they couldn't fix it. Now they will give back my money plus Uber rides. I was super patient with this nightmare. Can someone please help?
Original owner of an ‘07 Prius. Ignition coils in two of them were bad and the other two were less than good but just ok. Checked on a meter. Plugs were light to dark grey after 40,000 miles. Changed all plugs and coils. $750. Labor was $150 included in the $750. 250,000 miles on it. Passed CA smog after a 100 miles of driving. Now I can drive it another two years and then make a decision. 👍
I’ve been an owner of a FIXD scan tool for about 5 years. It has paid for itself 20fold. This OBD scanner has correctly diagnosed problems while a scanner at a major auto parts was throwing out all sorts of bogus info! Trust me…all scan tools are NOT created equal.
I got a PO302 code on my 2012 Ford Transit. I checked my oil and was low, so I filled it. Then I switched 302 with 301. Started it up and it ran good. So I was assuming (hoping) the problem was oil. I cleared the cobe and all was well for 2 months. Today I started with engine banging and poor idle. There were NO codes on my dash. Now I looked at my phone and was getting an issue on 1 & 2. I couldn't understand why my dash wasn't reading a miss fire in one. It onley shoed up in 'history' My friend works on cars said my FIXD reading on my phone probadly showed this fault right after I originally switched parts. I thought it would automatically show up on my dash as an alert. WRONG! The past history stays on the phone for your history reference. I don't know if I explained this well. $180.00 later with 4 new injector and I am running great with no laber costs. This may require a bit of thinking if you are not savey with codes like i'm not. ALSO. Auto Zone informed me the injecter I bought have a lifetime warranty.....I asked why the injecters in the van weren't got for the vehicles lifetime. They said they were a ford product, they see it all the time. Oh well.
@@909fresh ok thanks I got new coil packs and spark plugs.my mechanic said fuel injector next but I seen your comment and change.my mind.im gone get that done before I do anything else
The quality of fuel is significant. Maybe a higher octane would help your vehicle, or try not run it on corn cobs? I would suspect the wire set first damaged by heat under the hood, and maybe fresh spark plugs correctly gapped. ..the spark plug wire is dead at 300+ Ohms. ..and the wire from the coil should be zero Ohms. ..you need good spark, maybe the coil is weak? Thank you for the coil check procedure.
I have a misfire cylinder 1 on my 2010 gmc 1500 and I love my truck. I only had changed the spark plugs and went away for about a month then came back with the same problem. Spark plug went black at the bottom. And I’m no fixer trucker dude. And have no shop in my town. Anyone help.
I have fix this problem 3 times at precision auto tune it’ll work good for a while like 3 to 4 weeks then misfire again please tell me what’s the problem we changed the spark plug and coils 3 times
Hi I have a 2007 Liberty 3.7L V6, 117,000 miles. Owned it since 67,000 miles. It operated perfectly for the first 30,000 miles and then it started getting a #1 Cyl misfire code P0301. It also seldomly gets a #1 cyl fuel injector circuit open P0201. It must be a very mild fault as the misfire freeze frame data shows it always happens at less than 350 rpm and when cleared it comes back immediately at next startup, cold or hot. So it seems to only happen once on startup as its moving up to regular idle speed. The miss isnt noticeable when driving or idling. Its getting 15.5 mpg fuel mileage. Doesnt burn oil. Doesnt smoke. Has great power. I've changed plugs and coils but no difference. Cleaned air intake, air filter, and ran cleaner through system. I've cleaned and inspected the injector plug and all wires but no difference. Dry / wet compression test of #1, 3 and 5 cylinders all read good: 160 / 175 psi. I'm wondering if there's a mild wire defect for that injector, or just a flakey connection somewhere. Has anyone tried to use a new set of compatible gauge wires and run them to a place closer to the injector control? I can't see where the wires go though. I'm not sure if I should just live with this, or troubleshoot it more. I don’t care about the engine light as we don't have emission requirements. Now that I know the compression is good, I'm not so worried about it. Any suggestions of what to do next? Thanks!
Hey Fred! good question, you can buy the part yourself if you'd like. Just make sure it fits with your year, make, and model. If you want to replace it yourself there is a helpful video in the link description, or you can bring it to your mechanic to have him/her do it. Cheers!
Greetings Fixd! Just wanted to thank you for 'keeping it simple' for me! I have cleaned my MAF, purchased and installed new plugs, and ignition coils, changed the head gasket, changed transmission fluid/filter, and installed a new PCV Value...Yet the P0301 persists! When the weather permits, I shall tackle the task of removing the ignition coil into the #2 position and see how it goes, ugh. Thank you again and I hope your days are well.
Lol dude!!! I subscribed halfway through the video. I knew u were a great presenter and a great teacher. U remind me of Peter McKinnon... he helped me a lot when I wanted to start my videography career. Such great teachers and simple instructions that gets STRAIGHT to the point and make it look like an easy task to do... thank you man 🙏 I'm really a fan now, u gonna see a lot of likes flying in randomly from old videos 👌🏾🙏
Question. If there is a leak …. And you check the spark plugs and coil. Could the leak damage either 2. Then if you replace it. Would it still Throw a code or no. Even if the leak isn’t fix. ….. in my situation I have a 2015 mustang gt with 15,000 miles. That was running perfect. I just had the intake manifolds changed to a 350gt manifold and got hp tune …. I haven’t been able to drive it. 1st it was running lean. We found a lose clamp…. I picked up the car today drive it 10 block and the check engine light started blinking going into a limp mode for about 15 second. Then the check engine light stayed on. Code was misfire in cylinder 1 and 6 Please help lol.
Does anyone know what would be going on with my truck? I have a 2010 Dodge Dakota with a 3.7L V6 engine. It has a check engine light that has been coming on and off for a little while. Whenever I start it up it makes this puttering sound that seems to get better as i drive it. I have also taken it to a shop and they told me that Cylinder 1 is misfiring but they are stumped on the cause of it. They are telling me that these issues may not even be connected and there might be 2 things wrong with my truck. They are recommending I replace the engine as trying to find out and fix whatever is wrong would not be worth it. What should I do? Sell my truck off as is for whatever I can get for it or try to fix it???!? A new engine plus labor will likely be at least 4 grand :(
Change mechanics for starters...in the end if you dont get it sorted out and get a new vehicle DON'T buy another dodge...unless you like continuous wiring and electric issues
@fixd Any thoughts on getting misfire codes, yet the car doesn't misfire? I get combinations of 300, 301, 302, 303, and 304 after 4 ignition cycles or so with my 03 Civic 5 speed. I've changed plugs and coils, cleaned the EGR, EGR/intake channels, and cleaned the throttle body. Not quite sure what it could be. Sometimes the code goes away if I don't clear it. I have had to change the cam position sensor twice in the last 4 years and had valves adjusted about 3 years back, if that helps point to a possible cause. Thanks in advance!
Thank you! Solved the issue on Nissan Rogue 2011, it was the inition coil. detected with an odb2 scanner, switched the ignition coil with the cylinder number 2 and it returned me the code p0302. Buy a new one for 25 box.... Priceless your suggestion!
Thank you for the video. I have a misfire code on one of the cylinders. After doing various diagnoses, it has been definitely determined that the issue is with a bad ground wire on the fuel injector connector on the cylinder with the misfire code. I replaced the entire ground wire for that cylinder with the misfire code from the fuel injector connector all the way to the ECM just to be sure, even though I didn't even see a broken or chewed up wire. This didn't resolve the issue. The car has a V6 cylinder and I also diagnosed the other 5 fuel injector connectors. The ground wires for all those 5 fuel injector connectors are fine. Since replacing the ground wire didn't resolve the issue, is there anything you can suggest I try out at this point? For the time being, as an alternative method, I decided to splice and share the functional ground wire from the adjacent cylinder. In other words, I now have two fuel injector connectors sharing the same ground wire. This method has worked and has resolved the misfire issue. However, my concern is if this method is an acceptable resolution or is there any type of downside or hazard this could cause? Thank you!
2009 tahoe hybrid 6.0. P0301. Oil all over spark plug threads and ceramic tab. I cant figure out if its rings or valve seals because I cant do compression (dry or wet) because I dont have the tool to tell computer to crank. Any advice?
Oil on the spark plugs can be a few different things. This can be caused by a faulty pcv allowing too much oil back into the system. There are a few different tech bulletins addressing these issues. If the oil is in the spark plug wells, this can be caused by a leaking valve cover gasket, and/or o-ring seals. If the above listed are not the issue, a leak down/compression test is a good place to start. You will need a cylinder leak down tester and a compression gauge. This can be difficult to do and you may need to find a local repair shop to do this for you.
@@fixdapp yes. I grew up in a shop from 10yo. I changed the valve cover with faulty PVC to the new gm part with new gasket, Didnt help. I've done all the research possible. I've found the bulletins. I know how to do leakdown and compression tests but it's a hybrid so I have to have a tech2 scanner and place the computer in crank mode because it wont crank otherwose being that its hybrid. I just dont have the tool and GM will charge me easy 500 to test. Its leaking on the spark side threads. I've heard there is no spark tube gaskets because they screw right into the head. So that leaves valve guide seals or ring blowby. Guess I have to invest in a tech2 scanner :/ If you can reply and tell me the likeliness of it being ring problem or gasket problems base on symptoms I'd appreciate it. It misfires so bad that it wants to chug and shut off..vibrates the whole truck, and I lose reaction time when I press the gas...bad lag time.
No need to get codes for misfire. Turn your car on. Open the hood and remove one spark plug cable, if the car gets worse, plug it back in, that’s not the faulty cylinder thats misfiring. Keep doing this until you remove a spark plug cable and there is no difference in the performance of the car. This means that that cylinder is the one misfiring. First thing you do, check the cable/coil (whichever one it has), make sure it’s not broken and shorting out if it looks good continue. Second, check for spark, if no spark you’re gonna check your distributor cap (if it has one), if it has a coil and no spark, it’s gonna be a bad coil. If you have spark, take the spark plug out and check for any defect. If it’s fine smell the bottom of the spark plug, it should smell like gasoline. If it does not smell like gas, it’s your injector. If you check all these and everything is fine your problem will be a vacuum leak or a valve in the cylinder head is stuck open (not likely).