Infiniti G37 - How To Replace Spark Plugs And Clean Throttle Bodies And MAF Sensors 

Good info. Thanks for sharing. I have been an ASE master tech at an automotive dealership for 20 years. I would like to add to your comment about the ECU idle learn procedure: once you reconnect the battery, you should first make sure all the accessories are off, headlights,radio, and especially the A/C! Make sure the front tires are pointing straight ahead. Now, start the car up and let it idle. Allow the engine to reach “operating temperature.” This happens when the radiator cooling fans turn on. Keep letting the engine idle until the radiator cooling fans cycle on and off twice. This could take upwards of approximately 30 minutes. Then, your idle learn procedure is finished. You can even disconnect the battery and perform the above “idle learn procedure” if you have erratic idle problems, and you HAVE NOT done any tune up work. When you made the comment about “not to disconnect the electronic throttle body connectors”, I don’t see why not. The car battery is already disconnected. There is no power going to them. I have disconnected those electrical connectors many, many times, even with the battery connected. It has never caused me any problems. But, just don’t have the ignition on at all while working the butterfly valves with your hands. Just trying to spread some experience and knowledge. ✌️

My dad absolutely loves watching your videos. He only speaks Spanish but he fully understands the way you explain and is able to replicate. Thank you!

Well done. Good coverage of the tasks without the time waste and distraction of extra jaw flap or antics. Commendable. Thank you.

Just cleaned my throttle bodies and HOLY COW. So much more responsive. Thanks for the video! Getting UpRev tuning later this month. Can't wait!

Great video. Thanks for not doing it at night like other DIY car vids. I was able to change my plugs yesterday with no issues. I have over 200K miles and hope I can keep the car for years to come.

After watching this video, I decided to get the deed done on my 07 G35. Will update the results once I am done. Thank you for your video, very good. Carry on. Cheers. Update: I completed the job yesterday and My G is running smoothly and idles as it should be. I got told to be very brave to change the plugs and clean throttle body as people tend to go to the mechanics for that kid of work. With the help of your detailed instructions, I pulled this off. Thank you once again.

Thank you very much for this video. Thanks to you I was able to change the spark plugs and thoroughly clean the throttle bodies, and saving me $300 (that's what my Infiniti dealership said it would cost to change the plugs, plus they lied and said they would have to remove the intake manifold to gain access to the plugs!) in the process. People were telling me that it would be too difficult for me to do it by myself because I'm not a mechanic although I do have basic automotive ability. I'm glad that I followed your video and was able to do it myself without any issues, and also have the satisfaction of doing the job myself. Also my Infiniti runs & idles a little smoother now with a slight increase in overall fuel economy! Thank you my friend.

Just did mine at 95K miles, 2011 G37S, the car runs so much smoother now with far better throttle response and crisper transmission shifts ! Some of the plugs were in pretty tight and the threads were discolored like starting to bond to the cylinder threads, I put a dab of anti seize on the new plugs and I replaced the Spark Plug wire tubes. The Old Denso Iridium plugs were gapped at .038, the new Denso plugs came at about .041. When I finished I hooked up the battery Neg, started the motor, turn off all fans, radio etc. let it idle until the radiator fans came on two times, turn off. It was hunting for the new idle speed so drove it around some and now its right back to 650-700. Thank's for the post!

So my G37 Journey sedan wouldn't start a few days ago. I tried and tried, it would crank but wouldn't start. I pressed on the pedal it started right up. It has been doing that every now and then or wouldn't start on the first crank. I knew it wasn't my battery or alternator so I did my research and figured I'd try this out. I didn't replace my spark plugs but cleaning the throttle body and MAF sensors was more than enough. One sensor was actually faced the wrong way. Some hex bolts were stripped but it was worth it. Anyone with the same problem with their G should try to see if this will help. This video made it a lot easier!

Fantastic video. Hints and tips were valuable. Back right (looking at engine) spark plug the worst (had to disconnect spark plug boot wiring) but was able to replace battery, 6 x plugs and clean throttle, airflow in ~2.5 hrs. Saved a bunch = $300+. Thank you!

I just changed my plugs, cleaned the throttle bodies and MAF sensors and all is well! Actually this was way easier than I thought it would be! Thanks!

Hey thanks. Just tuned everything, watching your video. I even changed the pcv valves. Didn't think I could do it. U helped me get it done. 114k when tuned. Someone before me used autolite plugs..... horrible idea and performance. Only makes sense in the long run to spend more for quality parts. Spent a lot of time cleaning the throttle bodies. Big difference. I've subbed and will be watching ur vids to keep up with my '09 g37.

Great video!!! I changed the spark plugs and cleaned the mass flow sensors and throttle bodies without any issues on my G37. The throttle bodies were filthy - car has over 109k miles. The video made everything so incredibly easy. You The Man!

THANK YOU! My car isn't idling rough anymore. I would always see the rpm drop to 400 or 500 but now it stays at 650 without any problem. I let my car idle but it was still weird so i drove it and it fixed that problem. Awesome video!

Thanks man you saved me a lot of money! I was about to have a mechanic change my spark plugs but I saw your video and saw that I could do it myself.

Excellent video! Used to complete TB and MAF sensor cleaning on a '12 G37 sedan w 90K. The more extensions you have the better, its cramped at the rear of engine and the two rear plugs are the hardest of the job. Also, I paired this video with TB relearn procedure video from Motorvate DIY. Thank you for saving me hundreds of dollars.

I myself own a 6spd 2013 sedan. Your videos are very informative and well presented. Thank you! keep it up!

Well done with some good tips. My 2009 370Z now has 91K miles, so it's about time I take care of these tasks. The car is in great shape with clock-work oil changes (& especially with the new 6-speed tranny and rear diff), but I'm noticing a slight decrease in throttle response lately. I'm sure this will address that. Much appreciated!

Thanks for the walkthrough. I was concerned about the PCV valve hose when I attempted my plugs. You were a great help

Thank you so much for this video, you’re a really good explainer! You saved me a lot of money. I was able to replace my spark plugs and Ignition coils watching this.

I’m finna do my G37 tomorrow PEOPLE LIKE U WHO SHARES TALENT ARE AMAZING 🙏🏽🙏🏽🙏🏽

Nice video man! I did my wife's 2010 G37x recently using your video guide. One thing I noticed was when I took out the old/original spark plugs they appeared to have been gapped a lot shorter than what the manufacturer recommends. Says 1.1mm for new plugs but the old ones were not even 1.0mm (after 40K miles). Either way the car is running much smoother after replacing the plugs and cleaning the throttle bodies and sensors. thanks buddy!

Just wanted to stop in and say thank you! Just successfully cleaned my TB and MAF on my 2007 G35 (VQ35HR) with out a problem. It did idle a little high after cleaning but took it on a drive and after I gave it full throttle everything went back to normal! Better performance after cleaning!! My idle is back smooth and not hunting.. for those who are having problems you are doing something wrong and not sure what it is but unplug your negative battery cable and DONT unplug either of your TB.

Thanks for this video, it was very useful in cleaning my 2010 throttle bodies. It idled rough and high for about 5 minutes but everything is normal after that. I think it was the break cleaner burning off any how. Much easier job than I thought. Thanks again

You rock dude! So happy i came across this video.. Made my tune up that much easier... Hope all is well in the new house and all that man! Cheers!

Thanks to your video, I was able to do this tune up on my G37S. Appreciate your step by step instructions

holy fuck this is literally everything that i wanted to do in one video. thats amazing

Just found your Vid. About to do the same cannot wait to do this right under 100k ATM. Plugs cost me just over 100 for 6 OEM and my friend at Infiniti said they would have charged me like 400 ish. Your video saved me some serious mulaa.

Wow!!! Your video was simply AWESOM and I learned a whole lot viewing it and it was so much help for my infinity G35, 2007. thank you so much my friend!! And happy New year to ya!!

Alex, just finished cleaning Throttle Bodies, MAS and did the EPS delete, on my 2011 Infiniti G37X. The videos are Great. One small thing you left out was how to reset the idle, after removing throttle bodies.

Another good video - I'm using this an your serptentine belt replacement video this weekend to work on my '08 G35XS. I'm going to; replace the serpentine belt, change the spark plugs and clean the throttle bodies and Mass Air Flow (MAF) sensors- a good overall tuneup. Very well done videos, very helpful and thanks for taking the time to share with others!

Thank you so much this is so much easier to replace the spark plugs. On my Lexus is250 08 I had to take apart the intake manifold

Thank you boss, literally everything I needed in one video.

This video gave me more confidence on doing it myself , thank you so much !

Such a detailed video. Thank you so much! Great work

I really want to thank you for your G37 videos. I used your video specifically to perform my own tune up cleaned the MAF and throttle bodies! Im a chick and it felt so fulfilling to be able to do this on my own! I wouldn’t have been able to do it with out YOUR detailed video. All the others didn’t show enough plus you gave me extra tips on how to get it running efficiently. Im also going to change out my cabin air filter because the previous owners smoked. the smell has really gone away with time but it took a few months. I think the cabin air filter change will really clean it up. And your video there also is going to help me. When I changed my spark plugs one of them had oil on it. I have an extended warranty on the car so I’m going to take it in but what am I looking at? What type of problem do I have? I dont want to be taken advantage of at the dealership.

Great video on how to change the plugs I'll just have to keep watching the video to change the plugs to make sure I'm doing it right

Thanks for this video man, now I can safely and carefully get the job done myself 🙏🏽

Thanks, just did it yesterday on G37x 2013, at 75k miles, should say, spark plugs were still quite good, throttle had some tar, cleaned, MAFS looked clean also. As a result I increased MPG to 25.2 from 21-22, tested on 3hr highway drive.

You make this look so much easier then it actually is! Getting the air duct off on the right side was a PAIN!

Very well done. taking your time to explain what you did. I also own a G-37X and I cant wait to work on mine.

Best video yet, but I do need to know the size of the wrenches I’m gonna need for the autobody and the spark plugs. I have to buy this.

Thank you my brother. On point and straight forward. GOD Bless You🙏

Good video. Did these steps for the throttle body and MAF. Car sounds like it has a deeper growl.

Great video! Recently bought a G and wanted to do this type of maintenance Forsure!

Nice. If I didn't watch this, I would have probably disconnected the wires on those throttle bodies. The plugs on my 370Z need replacing. This tuneup will be a big help!

thank you so much brother! followed your steps and changed the plugs on my G for the first time myself. great instructions.. she runs much much better. thanks again 🙏🏼

Thank you, thank you, THANK YOU!!! I own a 2012 G37xs, and had rough idling. Even after I seafoamed her (my G37 is female 😜), she wasn't running as smoothly as she used to when I purchased her. Your video gave me the courage to perform this maintenance myself. I appreciate your attention to detail, along with your tips. Thanks for not cursing or chatting about irrelevant information. Most of all, thanks for saving me a ton of money. 😁 I have subscribed to your channel.

I love this video just straight to the point 🔧

Extremely well-done. You are a great communicator. Thanks for the help!

Great instructional video👍 Learned really quick and easy💯

thanks so much my brother usually does this for me you made it simpler to do I'm gonna change them next week !

Great job! Very clear explanation.

Amazing vids bro. So helpful - I'm about to do all this to my HR Z. Thanks again!

Helps for my 2010 370Z as well. Awesome vid!!

I know what I’m doing this weekend work on my G 😎 thanks 4 da video 👍🏼

gotta do this to change my coilpacks, didn't think it'd be this easy at all. dope video my dude

Nice vid, gonna do my plugs this weekend. I love my G

Great video, just did Throttle Bodies And MAF Sensors my self, thanks!

If you finish and the idle sounds like a Rotary check your maf connections, learned this today

A diy on injectors would be cool!

Great vid! Catch cans should help with the hunk in the TBs

THANK YOU THANK YOU THANK YOU! Completed this yesterday.

Got it done. Thanks for the help!

Great info! Love your work!

Excellent vid, man! Thank you!

Well described video, my g is approaching 84k. Think it's time for me to change the spark plugs & coils......thanks!

Great clear communication and great vid.....

This was very informative! Thank you!

Awesome video. I learn some good tips from it, thank-you.

I just don’t work on my car to save money, the satisfaction of knowing I did it is as good as the money I save or don’t save.

I know this is an old vid but great job!

I like doing spark plugs. Its really great for placebo effect too. Id say at least 20 hp and 20 torque.

Was thinking about doing this as well with my vhr37, The idle drop here and there at the stoplight. I like that you get the maintenance done early so that 100 buck changes turn into $$$$. Good video 👍🏾

Great video dude! Keep it up

Great video, I did it no problem. Saved at least $450 which is what I was quoted with a BS story about removing the manifolds

Excellent video as usual!

Great Video! Helps a lot! Thanks!

great informational vid - thanks !

Very helpful! Thank you

Good sound steps and theory on getting basic maintenance items being taken care of without question. Since you are basically...”In the neighborhood”.....can you change the PCV valve and along those lines is there one central PCV valve or one for each throttle body? Another trick I learned....well actually taught myself. When removing the plugs I do one cylinder at a time. When the new plug goes in, I immediately install the d plug into the box of the new one. I mark each box with the cylinder number and can review the plug later at my leisure. I can get the new plugs in then after reviewing the old plugs I can verify even and normal wear patterns and if there is for some reason the wear/burn pattern is abnormal then I can isolate to that particular cylinder for further troubleshooting. What technology are the OEM Denso plugs, Copper, Platinum Double Platinum, Iridium etc....?

Great tutorial! You did a fantastic job walking us through the proccess!

This Is Exactly what i needed. Thank you.

Just throwing in I disconnected the clips to the throttle bodies before. Just disconnect the battery for like 5 to 10 minutes. Hit that brake pedal twice for a couple discharges. Plug the battery. Back in. And then let it relearn idle like you said before driving off. Also good to leave that disconnected while doing headers and test pipes lol

Mad informal thank you friend!!

Great video!!! Thanks for sharing.

Awesome job

thanks for the video; will be performing soon

Awesome job man.

Hey Alex your dyi are awesome as I have said before and thanks for doing them. So I followed this video for throttle body cleaning and the next morning I noticed a check engine light I tested and it was a p0507. Has this ever happened to you? _Update_ I found a video of how to reset the idle. It's not to bad, involves rapidly pressing the gas pedal and holding it while timing everything. You definitely want to watch the video while you're doing it or you'll screw the steps all up.

Amazing video thank you..can you tell me the Exact plugs and wires

Thanks! Good tutorial.

The thin wall spark plug socket is nice to have otherwise you gotta use a regular socket and magnet wand

Bro, killer video. Especially for someone who is super inexperienced like myself. Doing this tomorrow.

Thank you, that awesome. Have question can you tell me the number 2 on wire that goes to coil is in middle or the 1st coil toward the grill?

Thanks for the tips, great video.

awesome video man, thanks, but why did you change the hoses to the red silicon ones you have installed now? like whats the benefit and what was the brand? just curious as to if i should the same with my car.

Great video! Thank you.

like your work brother keep it up

U make the best videos. Now i can do my plugs and stuff. Are those hoses better than a say k& n system?