1997 Nissan Altima Misfire Diagnosis -EricTheCarGuy

[@Jono.]

Is it just me or does this has more suspense than most of the crap on tv nowadays?!? What a pain in the ass. Well done Eric! Learned a ton

[@johbull3097]

Henry

[@shiftclick]

Hey Eric, Love your honesty. That being said, I learn so much by you "walking me all around the barn to get to the outhouse" Thank you for the education, Shifty

[@sabengco]

Thanks Eric

[@cynicky]

"Stay away from those stinkin' assumptions...they will get you"... Wisdom for many aspects of life.

[@techyguy1]

Don't feel bad. I can't tell you how many times I've went way far in depth trying to diagnose a misfire/air pump, etc. Sometimes the most obvious solution is the one over looked. No harm in looking at the entire system as a whole and testing/verifying each individual component. This video was a great learning tool for me as it was for everyone else. Keep up the great work!

[@forwardlookguy]

"Screw you, no gas for you." Haha, awesome. I'd say that is an accurate description. This is my favorite video to date. You included everything, even your mistakes. I think everyone learns more from seeing mistakes as well as the solution. Good job Eric!

[@MrAteazy]

Hey Eric I know you probley wont ever read this but I just want to say thank you very much for all the time and effort you put into these video I really enjoy them and instead of wasting my time I spend it wisely watching your videos you are very entertaining and very descriptive and help me a lot when I have an auto class in school I can have like a debrief on anything from watching our videos if I could sum you up it would be wonderful have a great weekend Eric your the best!

[@TheCrownMP]

Eric, I know I'm just another one of your viewers, but I'm 18 and got a job at Honda about 6 months ago, I've been watching your videos for quite a while. But I'd just like to thank for not just the countless times I had a problem and you had a video on it, but the life lessons I've learned about you on work ethic, and being kind and responsible and learning from mistakes. You seem like a great person and I'd just like to say thanks for everything man! Stay dirty

[@lawnerddownunder3461]

Hey how are you doing after 10 years as a grease monkey?

[@bityard]

Eric, thanks for taking us through your troubleshooting process and not editing out the dead ends. It's not always easy to tell what's causing a problem. You shouldn't apologize for heading down the wrong path initially, especially when making a video about it. It is very educational for newbies like me to know the different things we should be checking for.

[@eisman07]

Eric doesn't use high tech diagnosing tools because he tries to do tests that the average person can do. It isn't practical for the home mechanic to buy expensive equipment. ETCG is designed to save you money. Good video Eric. I've chased my tail many of times and then found the problem was right in front of me.

[@RonGJX]

I have seen a lot of your videos and this has to be one of the best. In particular I like when you explain the strategy and logic of a particular approach before you try something. And then when that does not work, you explain the next logical strategy and approach. A good Sherlock unraveling of what the root cause is that eventually reveals itself. I am way past my youger and foolish years when I would just throw parts in an attempt to secure a fix. The true fun is in an accurate diagnosis

[@Cragified]

I think this is a very good video to put up Eric because it shows the challenges a technician faces trying to diagnose a problem and all the possibilities they can be. It also illustrates how important it is to look at all possibilities before you start throwing expensive parts at it. A lesser tech would have just installed new injectors and then the customer would eat that without a resolution to their problem.

[@Grescht]

Eric, I'd like to share with you some things I discovered in my endeavors with this exact same car experiencing the EXACT same problem. I really think it'd be a GREAT addition to this video because the majority of the viewers watching this video are working on high mileage cars versus the lower mileage car featured in this video. After going through regular diagnostics, and replacing the standard tune-up parts, I determined my intake gasket was leaking as well. After a timely job of replacing it as you know, I also replaced both egr valve gaskets (top and bottom) , the egr inlet tube gasket located on cyl 4, and the throttle body gasket. I started her up and it purred like a kitten..... For about 5 mins. Then it went right back to missing at idle. Under load driving was greatly improved but under 2k you could feel the miss and I was not happy. I pretty much went back through the entire diagnostic process trying to eliminate things. Long story short,

[@Grescht]

When I replaced the intake mani gaskets I did not fully remove either half of the manifold from the car, I just separated them enough to get the job done. What ended up happening was during this process I managed to loosen some carbon somewhere in the egr passages because they were absolutely FULL of it and a chunk of carbon made its way into my egr valve which made it unable to close. This happened five minutes after it started and was running perfect. It had all the symptoms of a vacuum leak. I think you should add a note to the video really stressing the importance of full removal of the manifold so you can do a thorough egr valve and passage cleaning by removing the four access plugs located under each runner. It's impossible to do the cleaning in the car and if you reinstall with new gaskets you are just wasting your time. At any point in the repair you can knock loose some carbon and it can get stuck in an egr passage and BOOM, you're missing again required full removal a second

[@Grescht]

Second time. I learned this the hard way and after having to do THAT job twice, I wouldn't wish that on any mechanic. CLEAN YOUR EGR AND EGR PASSAGES WHILE THE MANIFOLD IS OFF!!!!! DONT BE LAZY LIKE ME AND NOT PULL THE MANI ALL THE WAY. YOU DONT WANT TO DO THIS JOB TWICE. ^ moral of the story kids Learn from my mistakes and Eric's knowledge. For information on how to clean the egr passages refer to Eric's video where he performs this job on a F22 series Honda motor that's very similar.

[@quadrunner2124]

+Taylor Gresch Heck, if I was in there with a chance to take the EGR out...I might just block it off lol

[@hayksamvelyan]

I felt a little bummed about Eric throwing parts at the problem, but I later thought about it and realized that he shows us the real-life human examples of what most people would do. Our mistakes is what helps us learn and get better.

[@jmaggs11]

Eric, I can do my job better because you do an awesome job at your job. Your explanations and logic make it easy to explain issues to my customers and tell them what they need. Thanks!

[@taipeiracer]

I absolutely love this video! My 2000 Nissan Quest is throwing exactly these codes (except the misfire code is for a different cylinder). I have done a number of things so far, such as replacing the distributor, ran the fuel injector cleaner, cleaned the throttle, replaced the fuel filter and air filter. The problem is still there. This video provides many great tips and tactics to think about what to try next.

[@jamiebales8394]

I accidentally saw the title of the repair video before watching this and that took the excitement away! It's painful watching you try to find the problem when I already know what it is. Tried shouting at the screen "Eric, it's the intake gasket!" to no avail.

[@ericthecarguy]

You're welcome. Thanks for the comment.

[@ManicMechanic007]

Simply the best automotive website on the net. Excellent as always Eric.

[@Gillymonsterproductions]

I wouldn't say you dropped the ball on this one Eric. Simply you gave other things to look at when getting said check engine codes. And I learned a lot despite what you may think is a mistake. Keep the vids coming and take care!!!!

[@moofushu]

This video is great because of the tests Eric performs to find the problem. Finding the problem is good skill to learn that comes with experience over time.

[@sc0tte1-416]

Man...seeing these videos hurts so much living in Canada. All the cars wherever you live are always SO CLEAN wtf!!!

[@PeterFeederHQ]

Eric the car guy ***** 5 stars for you man

[@Avrelivs_Gold]

Damn, I drove my E30 with that rough run almost 2 years now... Going to check for leaks tomorrow first thing!

[@jasonkf1]

EricTheCarGuy has the best videos I've seen on youtube for vehicle diagnosis and repairs. Quality video, nothing corny, in depth quality information. Many thanks for creating such high quality work with a wealth of information.

[@z31rider24]

only 86,000 k on it. My 2000 Nissan Altima GXE has 240,000 k on it. It runs smooth, no check engine lights, no oil leaks. Passengers are amazed how smooth and good my car runs and sounds. I pamper my car. Good line that Nissan produced.

[@rizalgaliza5125]

Z31Rider boii nobody care about yo 2000 nissan altima son. car still trash lol

[@matowixunplugged7927]

Rizal Galiza I have a Nissan Pulsar Hatch it's also an amazing engine runs like a clock

[@etraderx11]

Love Eric's videos.. one thing I also do when checking ignition wires is try to wiggle them as the engine is running to see if there is a connection issue between the wire and the spark plug.. this can often tell you which wire is bad too

[@coldwatercap]

I have acquired a 2000 altima and its running rough, kinda thought the intake but haven't checked it yet, wish to thank you for your work on this video and covering so many tests & has helped me on my homework before i dig in as im new to nissan...your a great teacher, thankyou

[@snower13]

May have dropped the ball but now we know how to test for maf, ign, and fuel problems. Great video for that reason!

[@younismark]

Very good video, Thank you. Misfire could be very frustrated. A friend of mine, his truck was misfiring on cyl#3 and we followed all the steps that you just did we couldn't find a reasonable cause for the erratic misfire that was happening only on high way speed, or high load.

[@jerri0401]

you can learn so much about engines in these videos as a layman. nice work. keep it up

[@MikeIllusion92]

This has helped me take a step back with an issue on my bike. I really should stop making assumptions.

[@100SteveB]

This must be one of your best information videos Eric, very educational. Good work. Assumptions, lol, we've all been there and done that - way too many times!

[@thec4ke]

Look at it this way Eric, you got a great all around misfire diagnosis video out of this.

[@johnsteele8382]

Great follow through on this Eric! I know this video is 10 years old but is helping me with my daughter's 2000 Altima right now. I'm a new subscriber for what that's worth.

[@SuperSpyMonkey]

3:35 "Okay, that screw snapped." That is so Nissan.

[@PineHollowAutoDiagnostics]

Yeah, those Altimas are known for intake gasket leaks! A quick look at fuel trims on the scanner at different throttle openings (during a test drive) is a great way to narrow down the type of misfire. A dirty MAF would give very different trims than an intake air leak. And after the fix, you'll have quantitative evidence that you fixed the issue! To rule out an ignition issue, you could have taken out the #4 plug with the boot, laid it on the block, and ran the engine. Otherwise great job!

[@chadgardee1496]

Pine Hollow Auto Diagnostics the real professional ☝️

[@meiszterful]

14:50 you can clearly see some electrical arcing in the distributor cap ...;)

[@anakinseviltwin]

I am amazed you have found a pre-2000's car this clean where you live.

[@jim22387]

These are some of the best instruction videos I've run across. Thx.

[@spelunkerd]

I"m glad I'm not the only one who has difficulty with the diagnosis of a misfire at idle.

[@fullrebelheart]

After weeks of research my car is fix do to your video you are great person for taking the time to post these once again thank you so much!

[@panzerveps]

1: I'm already a technician with 5 years experience, and far from a kid. 2: You ask "why" to "I hate when you go the wrong path during is diagnosis". That is a very stupid question. 3: I know perfectly well why Eric does what he does, and why he's one of the best (if not the best) youtube technician. If my english isnt good enough for you to understand, I'm terribly sorry. English is my 3rd language.

[@bb65346]

I felt like I was back in tech school (Baron Institute of Technology) with this vid. Love these informative vids.

[@devdhamija7585]

Watched it when it had 1,500 views. Refreshed after watching it, and it has 5,000. ETCG videos blow up real fast. Nice!

[@sup3rn0va242]

at about 14:30 in to the video i saw just at the distributor where the wires are coming out i saw some sparks flying from there.

[@JLin576]

Good catch, his logo is covering it up but I saw that.

[@aussieguy1012]

suprised eric didnt catch that its clearly earthing.

[@K.kswag21]

Same here also spotted that and commented glad someone also spotted it

[@vwmetal66]

Starting at 14:05 I saw cylinder 4 at the valve cover and wire arcing. Then I noticed the distributor arc as well

[@Nobody7720]

Looks like it's just water droplets vibrating from the engine. Also it's unlikely for the charge to arc from the side of the cap terminal to the side of the plug wire passing through two different insulated points rather than the solid conducted connection beneath. Arcing generally occurs between the wires themselves.

[@thetruevine7083]

Thank you Eric. This is perfect instructions. Appears to be identical with whats going on. Im rough around the edges. I appreciate y'all giving this much needed help.

[@alphy79d]

Thanks Eric! I feel like a freaking genius now. You're a great teacher.

[@pferdundhundj7989]

Stroicho metric?

[@joseirizarry8256]

Eric i honestly have to say i love watching your videos your perfect explanation and step by step on how to fix procedure, take care buddy.

[@layintrax]

I enjoyed the process... really well done!... I always learn something!... Just for thought, if I suspected the injector, I probably would have swapped the injector w/ another cylinder to see if the problem followed.

[@3rdRockDweller]

Intake manifold. Did it 2 years ago so I don't remember everything but you gotta: drain fuel lines, drain coolant, remove air filter, throttle body, starter, fuel rail, many hoses and really tough to find bolts, then have fun jimmying out the manifold and collector. There's more, I just can't remember. The dealership pegs it at an 8hr job. There are a couple hundred complaints online from Altima owners with the same problem, vacuum leak #4, lowest quote was 500.

[@andrewthompsonuk1]

This is a good example of the venture effect. Biggest leak when no. 4 sucks. Fuel trims etc may have have not been too bad. Spark wires were marginal. Good to clean the injectors now and then. In all good work.

[@heros2110]

Now that's a clean engine bay. My 2002 daily driver got about the same mileage as this Nissan w/ 85,000 miles... and it's not clean at all. Shame on me. ;) Thank you for this informative video, Eric.

[@NullH3ad]

Also with pinching off the return line. You boosted your fuel going into the cylinder, which eliminated the misfire because you ended up with more fuel + more air in that cylinder. You essentially had a lean misfire in cyl. #4, and boosting fuel pressure just helped to righen up the mixture.

[@russellprice7628]

Hello Eric the noise from the alternator is the rectifier best way to check this out to see if it's the problem is unplug alternator and start car and see if noise goes away.

[@zx8401ztv]

Smashing tutorial as allways eric :-) That was a complicated one, and if you get a bit misdirected then we would never have figured it out in a million years:-) Great learning :-)

[@thesetruths1404]

Hi. I've got an unmodified 1998 Nissan Pathfinder, 164,000 miles, 3.3L V6, 5 speed automatic transmission. Owned by an elderly couple...treated well. Runs smoothly. 10w-30 oil/filter is new and full. Same with transmission fluid. When it's first started it knocks or loudly rattles for 3 seconds. Then it stops. Once warm it will only do the startup rattle about 50% of the time. Exact same noise returns from about 1,800 to 3,200 RPM and then stops. Also, the noise quiets and sometimes disappears between 1,800 - 3,200 RPM if I let off of the accelerator and coast. It also will not do it sometimes if I'm going up a steep hill slowly with the RPMs are in that midrange, under the hill's load. The noise increases in speed and loudness with increasing RPMs. It sounds like 1 or maybe 2 cylinders of the 6, to me. The main bearings and rod bearings were changed. Looked good, some rod bearing wear on a couple but not serious. No rod or crank shaft slop was noted before or after replacement. Made no difference in the noise. The crank was NOT sanded/polished. It throws a P1400 code for EGRC Solenoid Valve error. I don't notice any idling or power issues though. It returns within a few minutes after clearing the code. Could this cause a knocking noise at certain times like I have? It runs smooth cold and hot. I've narrowed it down to 5 things based on its part time occurrence: 1. Flex plate? 2. Timing belt tensioner failing (unknown when last changed)? 3. Torque converter? 4. Hydraulic lifters? 5. EGRC Solenoid Valve? I have two short videos I recorded it and can share if you want to hear it. Thanks!

[@robert-bg9pf]

My approach to this after seeing the tune up partly improving the rough running, I would resistance check the injectors, then swap 2 injectors around to see if the issue follows that injector. If no change, I would suspect vacuum leaks. When you pinched off the return line, thus sending FULL fuel pressure to the injectors, you could be dealing with a fuel pressure loss which is simple to verify.... however, by sending maximum pressure to the rail and injectors, if the computer does not shorten injector pulse time accordingly, a larger volume of fuel will be injected, which helps compensate for the vacuum leak which makes it run too lean.

[@JeremyredlinuxRoberts]

I wish I would found this video back when it was first posted. I had a 94 altima with the same engine. As soon as I read misfire in the title I could have told you where it was and how to fix it. The #4 plug wire blows out the side and arcs on the wall, sometimes it will only miss under load because of the lower spark. The best thing to do for these engines is put a roll of good electrical tape in the glove box or the console and use it to wrap up the plug wire until you can get a new set. The brand or quality of wire doesn't seem to matter either, all will only last a year maybe 2 if your lucky.

[@TheCoatneyadkins]

you know it's funny you say that Cuz with my altima (not same year but same engine) the #4 contact inside the dis. cap on mine is where it would always misfire, the plastic around the contact actually got so hot it kinda melted a little bit and the contact was leaning back and twisted and all distorted. lol ended up just replacing the whole distributor cuz I broke the shield that covers the cam sensor and pickup n all that..... the new distributor worked....I had no idea the number four ignition miss was common on the ka24 engines. good to know though

[@wmcartpusher04]

I've never seen that old of a car that clean under the hood. (mainstream cars, anyway), looks like that car's had a nice life. Nice work, Eric. :)

[@buggsyspam]

We all chase the rabbit down the hole once in a while. Good to see the rest, and even entertaining.

[@The1Prince91]

Man your great I have a 96 Nissan MAX doing the same thing after storage in garage for 2+ yrs, I didn't want to invest the money for pro, diagnostics evaluation so you just saved me a ton of money. YOU ROCK MAN !!

[@AttilaThebung]

When you were looking for arcs, I saw a few arcs between cylinder 1 and 2, afterward there was some arcing at the distributor cap too.

[@patrickhurley1988]

Nissan Altima 4 cylinders in this vintage had problems with the intakes. It is very common. Also the knock sensor tends to go back too. It is much easier to get to when the intake is off.

[@eastcoastteddy58]

Eric you are a mechanical BEAST!

[@tigergreg8]

( I miss my 98 Nissan Altima. That car was awesome, even in the winter. But I had about 166,000 miles and wanted to get a decent trade in value, so, I traded it in. I highly recommend this car if your looking for used, if you find one in decent condition.

[@BMTroubleU]

Hey Eric, the best injector testing method I've seen it an injector balance tester. Just connect a fuel pressure gauge, prime the fuel system up to max by turning ignition on a few times and connect the balance tester to the injector. The tester is plugged onto the terminals of the injector and can pulse it 10, 20, 50 or 100 times. Looking at the fuel pressure after you can do a comparative check- 1-2 psi difference would be bad injector

[@krazyd27]

One of the main steps I learned while owning a nissan 300zx is if you have a cylinder misfire, always ohm out your injectors or checkb if they are clicking

[@dapsapsrp]

I had a similar problem with my '98 V6 Camry where it was running really rough. A local mechanic advised a major tune up calling for coils, 3 of them, wires and plugs. They wanted an insane amount of money so I did it all myself. I still had problem and tested injector #6 thankfully front bank of engine and it had zero resistance. Injector was expensive at near $100 and a bear to replace, Fuel rail grommet were very difficult to find for some reason. My throttle body gasket was also bad from age

[@MrFreeze79]

a really neat little tool to check FI without unplugging anything or taking anything apart is the EFI Quick Probe, neat tool!!

[@NullH3ad]

Hey Eric. I gotta say, I'm a fresh out of college technician working at a Chevy dealer and I've encountered this exact same problem before. But let me just say this. Your scanner is capable of reading live engine data, correct? You should have looked at fuel trim before you even stood up out of the driver's seat. You would have had a clear battle plan right away. A lean running condition, with a MAF code and a misfire screams vacuum leak before you even open the hood. Thanks for the videos!

[@lharper100]

Wow, that was one hell of an informative video, especially for someone that's never really worked on fuel injected engines, thanks! I'm working on a persistent mis-fire issue on my '93 Dodge Ram and even though it's a normally aspirated 318 V8 I got some ideas to try :-) Right now I suspect a fouled catalytic converter which I hope to confirm by pulling the pre-cat O2 sensor.

[@Michiganborn1969]

Excellent video. Those Altimas especially the 2.5 seem to be everywhere out here in Cali. Dime a Dozen seems like. Last year when we were looking for a replacement for our '96 Accord that got totalled, we took a '06 Altima 2.5 for a rest drive and loved the power & performance. The car wasn't in our budget and ended up with an '08 Kia Spectra. Also a good car but would be better if it haf cruise control.

[@forwardlookguy]

Yes, they will have a bleeder valve too. Same principle. Pump, loosened the bleeder, tighten and repeat until you have a solid stream of fluid.

[@grantlarmstrong]

I very much enjoyed this video. I think some people view and want to see perfection. This is a practical experience and MORE likely to be the case. Thanks for posting this one Eric. Stay Dirty!

[@ShabangalangMoto]

Great vid. Really like you including all your diagnosis even if it means you miss something. Very helpful

[@jimsjacob]

Excellent video! Ton of info here. I had performed about two of the test listed here and it still seems to point to a bad injector, but now I will follow through on the others to verify prior to removing the intake collector.

[@LJT9393]

I just bought a car, 2004 civic, only has 83,000KM on it as I’m in Canada. Anyways I had to bring it back to the dealership as there was knocking in the front when going over bumps. I took the wheels off myself and found the stabilizer links were rusty and bushings cracking and breaking apart, which in my opinion, if they did a “155 point inspection” should’ve been noticed and replaced. So they fixed it for free the front and rear links, and also an alignment as when the wheel is straight it veers to the right pretty hard. The knocking is still there while going over bumps but i do notice the difference from the new links. It still pulls hard right when wheel is straight, and now when I start driving in the morning after it has heated up slightly, when I come to a stop the engine kind of stutters and vibrates/shakes the car. I’m thinking it could maybe be a misfire, but when we went to test drive it, I pulled the oil dipstick and they had overfilled the oil majorly.. I’m talking like at least 3 inches over the 2nd fill hole (full mark). Does anyone know if the symptoms I described could possibly be from the oil being that overfilled and it being test driven by others like that, if there’s is air bubbles that got into the crankcase and around the pistons? I’m not a mechanic but I do a lot of work on my cars, just haven’t done major internal repairs or diagnostics. Any help would greatly be appreciated, as the car is pretty much brand new kilometre wise, and I don’t feel it should have these issues unless the dealership guys knew something was wrong and they lied anyway.

[@Crappie_Hunter_Seeker]

Really enjoyed this video. Thanks for showing us everything you went through and not cutting out any mistakes, etc. Really nice video. Thanks for all u do.

[@CrazyPearldrummer96]

I'm surprised that you didn't see the arcing on cylinder number four. You can see it clearly right after he rew the motor. When the engine then goes back to idle you can see the fast arcing bolts from the ignition wire to the valve cover. Watch for the arcing on cylinder four from 14.02-14.07. But still great vid, like always good job Eric!

[@titankingse]

Awesome video. Was glued the whole time. I'll be watching more.

[@LuisTorres-pe1jf]

Had a problem like this, cylinder 4 miss fire . Did everything the previous mechanic did but I went further. Found that the intake gasket had a crack on it .replace it and bomm. Smooth running 5yrs no problem.

[@CharlieSill62VO]

Erick! Trouble shooting has never been this fun for me! Thank you!

[@4HitsWilystyle]

Ouch! Skipped over a few steps ie compression check and vacuum leaks... But! you did find the problem and that 1 wire was questionable and the cap had some wear, so at least it wasn't wasted money. Those Nissans are well known for intake leaks, thought out of all people you would have known that, "Mr import of that vintage" and the other take of it, learn from your mistakes. No one is perfect!

[@polipochilegge]

i'm gonna make a leak test on my car right now! it has the same problem, i love you!

[@gagarinspace]

Excellent video, mate! Keep up the good work! In addition to tech savvy you've got camera presence as well!

[@صديقرايت]

this video is the boss i like when the challenges are tough and this was a difficult one. it did take some level of patience on your path. love it. Stay Clean.

[@ElectoneGuy]

Honestly Eric, you should be on Speed TV with your own show.

[@aracp]

vacuum gauge test before and after would be nice. thanks for the videos...

[@Excel3544]

Thanks Eric, I learned a lot from this video; you're a great teacher w/ systematic diagnosis. I really appreciate your video after just changed my intake manifold successfully by myself (after watching 2 videos - from you and the other guy).

[@scottj5588]

once again eric you really should buy paul danners book, scannerdanner, seriously bro, real diagnosing! dont feel to proud man, i know you love his videos

[@danway60]

My friend had a problem on his peugeot where it kept mis-firing and throwing up the check engine light - even going into limp mode. He took it to a garage and they couldn't figure it out. They tried changing the injectors and the wiring loom - but the problem remained. Took it to another garage and they wanted to change the ECU. I thought i'd start simple and have a look at the spark plugs, one of them was bad so I changed all of them (it was due a service) and no problems for the last 3 months.

[@ClumsyCars]

Whenever we get a car in the shop equipped with a MAF sensor and a misfire, I always check for vacuum leaks first. It's not always the problem, but a lot of the time it is.

[@estrelladelnorte1308]

very nice, i like that you showed that even with all your experience things can be missed.

[@jeffscomp]

While you were starting this job I thought about when I was about to buy an older Altima and researched reviews about them and numerous people complained about bad intake gaskets. I guess this issue is common on older altimas.

[@jason12001]

I've worked with these motors quite often and knock sensors tend to be fairly common on these engines. So more than likely, that will need to be replaced in the near future. It's rather common on older Nissan/Infiniti's...

[@juice692003rr]

Great job on the diagnose. It really helped me out on finding the problem on my car. Keep up these great videos and Keep them coming ty.

[@NFor22]

i have 95 f150 5.0 and i have a miss fire at idle as well. i have replaced all ignition (wires, control box, plugs, distributor cap and button, coil), checked for vacuum leaks and cant find anything, i have also taken the intake plenum and throttle body off and cleaned them as well as replaced the gasket along with cleaning the iac valve. i did have a wet spark plug with gas so i replaced the injector(fixed the wet plug). Fuel pressure is good as well as the Fuel pressure regulator.

[@michaelserrano7097]

What was it?

[@mixedboi]

No, not at all, Im a car enthusiast and I watch it almost always for fun and because he is a great mechanic =) Learned A LOT though

[@2bluejay0]

Enjoyed this video. Can there be a misfire in cylinder #1 if there is a vacuum leak by throttle body? Thanks so much for your response.

[@mikewithers7685]

good video, although you went about the misfire the hard way. I always first look at fuel trim to check for problems first. fuel trim can determine a vacum leak. Also second in order would have been a compression test. I would of recomended the wires and cap though. both looked to be a potential problem.