I've had several codes coming up on my 2003 Corolla. Engine running lean, Multiple Cylinder Misfire, Catalyst Efficiency Below Threshold Bank 1... All related. The amount of time I wasted watching other videos about is is REDICULOUS. Too many who can't speak the language going over every irrelevant God damn detail making it so painful to get through. Daniel, this 1 video nailed them all. To add, you speak clear English. Had I watched this one first I would have saved myself a lot of time and irritation. Keep up the good work!

I really enjoy all of your content. Keep up the great work Dan!

Hello, you did a good job except you should never bend the air intake hose. Just unscrew the 2 bolts of the air intake body and turn it over 90 degrees, now is safe and out of the way. Toyota orange gasket part #17171-22060 and throttle body gasket part #22710D051. Hope this helps someone.

Great detailed video. These codes were my exact codes. This repair is exactly what it needed. Great idea removing the whole throttle body...saved having coolant all over my garage. My advice, when you order the gasket, order the throttle body gasket as well. Mine peeled a bit when I removed the throttle body...save yourself the extra trip. GREAT VIDEO

Thanks, Daniel I installed a new gasket, and that fixed my 03 Corolla's P0171, P0301, and P0325.

My 2007 did the same thing. I replaced the gasket and the Engine light didn't come back on for about a year and a half. The code came back so I replaced the gasket again, but this time the code would not go away. This time it was the intake manifold itself. It cracked at the heat weld seams. I cleaned it really good and took black silicone gasket sealant and squeezed it in every seam. 4 years later and it runs fine. Just an FYI. Hope that helps.

Excellent video, thank you. I just replaced the intake gasket, injectors, coils, plugs & valve cover gasket yesterday on my 08 that has 250k miles. Runs perfectly smoothly now and more importantly cleared the lean code that recently cropped up. These Corollas aren't sexy but they run FOREVER if you take care of them. I was confused why coolant was routed to the throttle body but your video tipped me off. Thanks again

Thanks for this video! I just recently acquired a 2007 Toyota Corolla S model with a 125K on the meter. I got it to replace my 06 Corolla that was totaled in an accident . that one had 243K on the meter. Never had any problems like this but now I know to keep an eye out for it. so far other than dirty transmission fluid, this car seems to be in excellent condition for a 10 year old car.

My 2000 Corolla CE (1.8 L engine) had this problem and plugs, coils, injectors and cleaning of the IAC and throttle body did not resolve the problem. But the valve cover gasket had been replaced after an oil leak surfaced at a local garage (car is 20 years old with 277K miles). It made sense the intake manifold gasket would also be old and starting to leak when this showed up. Replacement was simple (local mobile mechanic) and problem went away!

damn, I wish I had a mechanic like you in my area.

Mr. Daniel this video was very outstanding great job best video I've seen I have a 2007 Corolla S automatic and it high revs right off the bat and stays at about 2000 RPMs it will idle at stop lights like it wants to give out sometimes it feels like a misfire though the car will rattle noticeably but im for certain that this is the problem because I've had the same mishap a numerous amount of times, but great camera edits, great how to do, great step by step structured process as far as how you did it hands on, please make more videos Man Ive gone through so many but they don't do them as thorough as you do definitely worth a like And subscribe 👍

Got P0133 last winter and this winter as well: "Oxygen Sensor Slow Response (Bank 1, Sensor 1)". Both MOT inspector and mechanic said it's the Oxygen sensor. First thing that google gave me was a service bulletin stating it's the gasket if the issue happens in subfreezing temp (which is the way it's behaving so far). Already ordered the gasket and will DIY this like in your video. Thanks for showing us how it's done without needing to mess up with the coolant lines (like it's shown in other youtube videos). Thanks!

Just a heads up. Be careful with the brake cleaner and plastic intakes. I have seen them in the shop backfire up through the intake when checking for intake leaks and bust the intake assy. I do enjoy watching the videos they are very informative.

Enjoy your vids and boy you work fast!

Nice Job, one small critique, I am not confident of my ability to keep something from dropping down the intake by accident, so I would have waited to install spark plugs until after I had the manifold back on, or at the very least stuffed rags in the holes to keep me from having to remove the head because I screwed up!

Got same happening to my 2004 Corolla, have not done this yet, but after chasing the misfiring codes found engine running way too lean; this is an overhauled engine job with standard sizes pistons and rings; head was done by a shop it was shaved minimally that toyota recommends not to do so, I installed cheap injectors from Amazon for the sake of refreshing the injectors not because it really needed, well, by second tank of gas after using a lucas cleaner for the fuel system the codes started; this morning I replaced the injectors went back to the OEMs after cleaning them; got no codes now but the ECM needs to go through driving cycle again for 50 to 100 miles and see if codes comes back; I have not done anything significant so I expect them to come back. That intake and throttle were cleaned really good and have new gaskets. I do have a vacuum gauge but I just don't know where to connect it to make the test and cant find it here either. A compression test at operating temperature gives me way under specs; I am around 131 and holds steady for few min, where manual reads should be normal 189, minimum 145. Head was torqued to specs very carefully and what I think is the shop that did the head may have screw me on the valve job; I can not guarantee any mechanic work on the car done by others; I am NOT a certified mechanic by a long shot and did this engine on my own over the course of the years with whatever pieces of information I can get here, in the manual and asking mechanics who are willing to share; very difficult with zillion of questions at every turn and not everything is easy and readily available online. I am thinking that I may have a vacuum leak somewhere but have yet to find it; that is a far cry from having bad coils which I have 8 of them and bad spark plugs, unless these misfiring destroyed those parts, I had also issues with the VVTi solenoid but added half quarter of oil and has not shown much; weird as Toyota burns oil for fun even new oil as the oil was filled to spec but seems it went through half quarter in the first 100 miles triggering the P0010 code; so besides that code lately are chasing these P0300, with P0351-4 and here we are. Dealer service manager told me my timing may be way to retarded causing the issues, or because head was shaved threw out the timing hence misfiring but it may be as simple as vacuum leak done by a poor job on the head that can't see or my choice of crappy Chinese injectors which I corrected this morning; I can't wait for 100 miles to roll!

I like this video, useful for me and for others. Direct and well explained also, that TB taking our is a great idea to prevent those coolant for leaking ad prevent air in the system as well.

This is an excellent video on the subject.

Thanks! This helped me confirm what was going on with mine.

Thank you man for this video. God bless you. I have so much trouble with 2000 Toyota corolla . It runs lean 171 error code. This morning driving early to work I hear some "" gun sounds "" from the exhaust. Seeing your video I was happy. Hopefully it will help me fix my only transportation.

excellent, thanks Daniel! still cringing on the drill driver/spark plug : ) God Bless

Always use correct specified torque especially when tightening plastic to metal

That little vacuum leak was a real gas saver. But after this last winter turned into a drivability problem. Plugs came out at exactly as he says - .085 to .090" gap, and Clean ! Some loose manifold nuts as well. Went with the upgraded gasket and she drives like a dream. Need to put a rev limiter on it though !

Hey Daniel, I know you've been at this longer than I have, but I wouldn't trust those little drivers like you used most of the video to put manifolds back on securely. I used one when I had to take my exhaust manifold off on my truck and when I used it to tighten it back down, the manifold leaked like mad. When I went back over by hand, where the driver stopped wasn't even tight. It was a snap on like yours and still did that.

Amazing! Just did this on my 2009 Corolla + 4 new spark plugs and works like a charm!!!! Thanks a lot!!! Greetings from Argentina 👍👍👍

Had this problem too. The only problem is you installed the same nitrile gasket which will fail again. You need to install the updated orange silicone intake gasket from Toyota that fixes the problem permanently.

Nice work, as always. thanks

Excellent video...I like the car jack too

Dan your the man! Very helpful

I have a 2006 Matrix with 125k. Runs perfect. However, it's great to have your.video as this is a common problem. I've also heard of spraying water to see if engine stumbles.

I definitely going to try it I have a multiple misfire cilynder 1-2-3-4 I replace the coils and spark plugs and still have the same codes P0300-P0301-02-03-04 thank for this video

Nice work, only bit I wouldn't risk would be using that impact to run in the spark plugs.

This will most likely solve my CEL issues. Currently have the same codes pop up.

Thank you for your great video

Interesting, I'm trying to chase down similar error in my 2000 Corolla, I get misfire and was told to review coil packs and injectors. Coil packs and all plugs are new. Upon inspection, coil packs look good, no il and no tears. One plug however looked worn after less than 25k miles. I never thought t review intake gasket - that causes lean running that could damage a plug? Also loss of power (no climbing power)? Very awesome.

Hi Dan im new to your channel and liked it do straight forward with the problem, no unnecessary explanation about each step and fast explanation. I have 09 corolla 1.8 with code p0301 and I changed spark plugs and still have code with miss fire in 1piston can it be same as this video, bad intake gasket? Hope you can help thanks.

Cool video very helpful

My 2006 Pontiac Vibe had this same problem. This fix is extremely easy for any beginner DIYer.

Still ,best damn tutorial on Toyotas

There Is A Updated Gasket For That Car. Other Then That Good Job!!

Great Video

Haven't had to do that on my 05 yet but it only has 96k on it. Belt tensioner has been replaced once under warranty and again by my with a upgraded one though

I wish you had better described exactly how the car performed while driving as a result of these misfire and lean fault codes.

Same codes 02 Toyota Celica 1.8 engine, testing this tomorrow.

I Thz 2-VERY MUCH indeed (!)-Nathan Glentworth-4-updated infor to use "updated orange silicone intake gasket from Toyota dealer parts department!" We all know nothing is permernant, but the oragnge gasket likely made 2-3 times longer than "black gasket" I hope. I will try oragne color gasket THANKS so much 2 Nathan...

The step by step on the intake gasket replacement is great, but why do I cringe everytime I see you use that drill driver to tighten those new spark plugs 🤣

just a quick question about the intake ports on the engine block. the three rectangular ports between the intake ports, what are they meant for as i would like to know what their purpose is .. cheers :)

90s v6 Explorers have the same type gaskets. Just did them on my 96/

I have a 06 Toyota matrix and replaced the intake manifold gasket and im still having misfiring in all for cylinders and suggestions

I have a 2003 Matrix. I just sprayed the car with brake cleaner before this video and have the same issue. I ordered the upgraded gaskets Thanks Daniel for the quick fix. Thanks @ trumpetpatrick for part number 17171-22060. Part arrives tomorrow keep you posted. 🙏👌

I had a cylinder 3 misfire in my xB (camry motor) and it needed a new ignition coil.

And the pontiac vibes with the 1.8 as well.

Had I known this I would have fixed my old 2000 Ford Explorer all by myself. (Don't get me started on that it was a Ford and that was the real problem, that car was amazing).

Sure beats doing the intakes on a Chevy V8 any day. Only thing I may advise, is there was an updated gasket for that car.

I had a strange occurrence today was driving and got bad hesitation(barely made it back home)I read obd it said misfire cylinder 3(i figure coil)so to make sure I switched 2 and 3 coils,erased codes and the problem went away?Bad connection maybe?I'm stumped and i have children and dont wanna get stranded if it decides to do it again.What would u reccomend?

Great video! Thanks a lot. What did you torque the spark plugs to?

does this apply to the 99 model also? i've replaced .... plugs, wires, coils, o2 sensors, injectors ..... still a misfire

99 lexus es300 throws lean bank one, cylinder 2,4,6 misfire. cleaned mass airflow already, replaced spark plugs, what do i do now misfires are random i can tell when light flahses

There is an updated (orange color) gasket available. I believe it Viton instead of an NBR rubber. Handes the heat better.

Does this code apply to 2001 Corollas as well?

I have a 2000 Corolla with a P0300 or P0304. I wonder if it’s the same issue. I’ve never done this work before. ... a little skittish to try.

Why are some of the videos on your channel gone? Did the old shop you worked in get mad that you filmed some of the vehicles you worked on?

Good one

Need your opinion. Have P0171 on a ‘06 Corolla and misfires in banks 1-4. I changed out the spark plugs literally 4 months ago, so I have completed the following: cleaned MAF sensor and throttle body. Put in new intake manifold gasket. Same codes are throwing. Do you think I could have bought a bad batch of plugs? What would YOU do in this situation because I am stuck. Thanks.

This is a real technician right here.

Super. , Excellent ， I got code PO171, PO300x PO 301,2,3,4 and po133 together on my 2004 Matrix , I replaced MAF sensor, air filter, four spark plugs and two coils , and PVC hose and breathe hose, but nothing changed ， car shaking a lot on idle , should replace of gasket kill the problem?

Would this cause a car to not drive? Car has bad misfire when I put it in reverse or drive I have to hold throttle down almost all the way to get it to move at all.

I had an 03 corolla with 250k miles that had the same problem

Is that also for a 2009 corrola

I need help with my cylinder 3 misfire and lean Fuel code, my mechanic replaced coil packs and plugs and still causing missfire in number 3. Would I have a pontiac vibe with similar engine. I wonder if this is the issue.

Wow, it's basically the same design as an Accord of the same year.

Great video I test mine the same way and guess what intake leak at cylinder 1, as a temporarily fix I cleaned the area of the leak started the engine and then I Brushed on engine oil over the leaky area and the vacuum sucked in the oil and sealed the leak. It's been a week now and no codes. If I get another code I may brush on gear oil this may last longer and I will replace the gasket when the weather gets warmer. Very cold her in Toronto Feb/18 2020. The gaskets are cheap always go with Toyota or Fel-Pro bet they will be very close to same price

Thanks

Is this a similar troubleshooting for the 2000-2004 Celica?

What kind of lift is that?

just wondering where you got your lift or what brand it is.

A car running lean or rich will not change the Gap of spark plugs

I had all 4 cylinders misfire codes after having a brand new transmission replaced no air leaks 2003 Toyota matrix automatic. I'm thinking it's my flexplate that's worn out. 258,000 miles

Excellent video. Who's behind the camera?

The number spark plugs 1zz-fe 1.8 should be in ur owner's manual n look it up in google or just call or pay visit 2 ur dealer part they should tell U.

Great

Well done Dan, 4 Bobby FYI, spark plug torque is 15LB 4 Corolla n Dan is very close to that, CZ he know after got tighten, he just use 4-fingers us tight, not using FULL-HAND power torque tight. I have torque wrench, but it is pricy, I paid over 100, did not have to. I approve, does not mean much, but agree with what Dan did in placement of torque wrench when he tighten spark plugs that U don't really need indeed n I C Dan has Automotive Excellence Serivice Certificate DOES show, delinate, he has been well trained AND also demonstrated offically validated his automotive technology knowledge in offical setting! Well done again, from Capitol of Sillicon Valley, SJ, CA, USA

Hello Daniel, Thanks for the video. My situation is a little different. 2007 Corolla, same engine. Just turned 30k. (Purchased from Elderly women, didn't drive much) Showroom cond., no codes, runs great..except: Were feeling an occasional "hiccup" mainly when 1st starting for the day. You may only feel it 1 or 4 times during a 5 mile drive. -Due to age , we did put oem plugs in -cleaned maf sensor with crc spray -cleaned throttle body and blade -checked for vacuum leaks -ran a bottle of gumout (with p.e.a.) in last tank full Can you think of anything else I could try? I know this engine is one of the best built and should not be doing this as infrequent as it is. Thanks Tom

I should have said, typo, he knows, gramatically correct in 3rd person singluar...

Anyone else had this problem? What was your experience?

You should give us ball park prices for these fixes you do. I know the customer has some privacy but at the same time they are complete strangers to us so they do have privacy

Had this same issue with my moms 03 corolla. replaced the intake gasket, shortly after I had a lean code again. Could never figure it out, did smoke test, fuel pressure test, etc.. I eventually changed the injectors by throwing parts at it cuz they were cheap and it fixed it. The car doesn't even have a fuel filter......

Please my friend what is the number spark plugs 1zz-fe 1.8

Also I would have torqued the intake bolts down to spec and the throttle body nuts and bolts to spec. Good job otherwise.

Need help - I got 2013 Corolla LE with 194k KM, changed oil regularly. When I bought at 151k KM, it used to give me 600KM for full 40L Tank. It gradually decreased to only 450KM for full tank. Also sometimes I smell gas or rotten egg smell while driving. No codes or error comes up. Any advice?

I hate when people don't use torque specks

Dimples leather steering wheel,, NICE

Is that a Milwaukee tool?

bro, take 5 mins and clean the part before reinstalling..

Sir!!! I have toyota MRS 2000 with 1zz engine, my engine light turns on after 10-15mins idle/driving, I'm also experiencing misfire in my muffler, I have the same error code P0171, what should I do? I don't trust the mechanic here, he's just also searching in internet how to fix P0171, I'm just afraid of spending money to replace every parts that might cause P0171.

Why did you get rid of the Chrysler 200 running on lean video?

Why didn't you change the PCV valve which sits below the intake also. You had the intake off.

Daniel, were you on flat rate on that job?....LoL.

Why aren't you working at the rental company anymore?

sorry , I meant : " 1 to 4 times during a 5 mile drive"