I cleaned the Throttle Body and Mass Airflow Sensor for a 2006 Lexus GS300. If you are experiencing erratic high and/or low idle RPM, you may benefit from cleaning the TB and MAF.
I have just done this self service earlier and now my car is idling at .680mph when turning on the A/C is barely up .710mph or less. It had a rough start about 5second then it calibrated itself. I gave it a ride and oh boy.. it was smoother than before. Thank you so so much for sharing this video and making everyone else life easier! Cheers!
Great video brother, driving on auto mode and not S mode and the rpm reaches 5 and 6 that was super impressive, my 08 GS 350 the rpm barley hit the 3 , I should definitely clean this thing out 👍🏼 thanks again that was very helpful
Worked for me 2006 Lexus gs430 - cleaned the MAF sensor , cleaned the air housing compartment and intake tube with simple green or safe cleaning solution while I waited for my MAF cleaner to dry from spraying the sensor,. I had codes P0175 and P0172
@@joseCalderon1976 Don’t use anything but MAF cleaner to not damage sensitive sensor. This is pretty basic stuff and you definitely don’t want to use brush or rag to clean it. Basically you are wetting the dust build up and force of the spray blows them away. Painless stuff. But be careful handling it to not touch the sensor and definitely do not drop or toss it. Handle with care.
Great video man, Is that an AMG battery from interstate?? I was looking for one but they don’t have group 24 for my 08 GS350 , you mentioned something in the end of the video about Relearn idle !!? What is that
@@DIYLifeSkills is it regular lead acid battery or amg ? Or you don’t know ? Because I heard amg battery only works best if the vehicle comes equipped with it from factory but not modified so I’m wondering how it is treating you !? Thanks anyway
Pretty much all modern car’s computer and sensors are constantly detecting the air and fuel flow and adjusting the mixture rate for optimal fuel efficiency and performance. So the buttery flap that opens and closes controls how much air is being mixed with fuel. At idle, that flap is nearly closed to give more fuel to the piston for easier start, and for smooth idle. So the “idle relearn” is what car computes automatically to ensure smoothest idle after engine start. On some sensitive cars, especially European cars like BMW, Benz, VE, etc. after the throttle body and MAF sensor cleaning, car idles rough for minutes up to one hour until it calibrates the smooth idle point. So each car has unique steps to expedite the idle relearning manually immediately
@@costantineyoussif6679 I replaced the battery with something different so I don’t know st this point. The 5 year warranty ran out so I had to buy a new one from Walmart
@@DIYLifeSkills do you think 08 gs 350 will adjust all that automatically or do I have to do it manually? And thank you for the well detailed explanation👍🏼
Then it might not be plugs or coils. Is the engine slightly rough on cold start idle? Was there any recent service done to the engine area? When I used slightly cheaper denso plugs, mine misfired immediately and I ended up getting refund and got the matching plugs and misfire went away.
Had rough idle and experience missing /. knocking at some speeds. Hence cleaned the throttle as you did. Later car was not starting for another 5hrs. Maybe I had sprayed excess fluid. There was no change after cleaning. Tried to relearn the thottle body reset from another video. However still the missing persists. Please advise any solutions
Sorry, I missed this message earlier. Rarely, TB cleaning messes up car starting, unless TB was already going bad. By excess fluid, how much are we talking about? Some extra spray can only throw off the air-to-fuel mixture ratio and engine could briefly run rough and misfire, but as you drive, these symptoms should all disappear with 5-15 minutes of driving as all cleaning fluid is burned off. The master Toyota mechanic (Popular "Car Care Nut" RU-vidr) says, Toyota and Lexus do not have relearn steps after TB cleaning, and that car's computer (ECU) self-learns the as you drive. About the only thing you should notice is a slightly higher RPM right after cleaning which gets corrected as ECU makes adjustment. How is the car now? If you are having issues, are you getting check engine light and (ODB II codes)?
Two sprays are completely different. TB cleaner is a harsh chemical to melt carbon build up. MAF cleaner is gentle cleaner that dries fast for sensitive electronic parts. Don’t use TB cleaner on MAF as you could damage it. If you get the small can, Walmart sells both as a set for $8.50.
It could. But also make sure air filter is clean and the entire air passage way is clear. Also, make sure the air duct the MAF is sitting is not cracked and both ends are properly clamped down to not leak air. MAF on this car rarely goes bad so make sure the connector is not broken and it’s locking tightly and that respective MAF fuse is not blown.
What’s CSV? MAF sensor detects amount of air and temperature of that’s coming in and automatically adjusts the air/fuel mixture. So as long as K&N filter doesn’t hinder proper airflow it wouldn’t cause check engine light. Which car do you have and what code are you getting? Also for did you swap out for cold intake K&N filter and by passed the entire air filter housing?
kn filters have oil on them and make the MAF sensor dirty. Eventually you will get a lean code and and a check engine light. A dirty MAF is handled by the computer similar to a vacuum leak. More fuel is added to make the mixture burn properly to reduce emissions. This issue was known for 25 years already. If you clean the MAF, every 10K miles, it should be ok.
@@DIYLifeSkills I believe it means something like vehicle stability with the check engine light. The code says too lean so I believe it’s my MAF. Getting my k&n taken out and going back to stock. Thanks for responding
He means VSC (variable stability control) he just got the acronym twisted. I just bought a 2008 GS350 AWD and I’m having similar issues. I have the P0420 and all the shops are telling me to get a new catalytic/manifold. But other shops tell me that it’s coming a source at the motor making the OBDII think it’s the CAT. I also have the VSC light and a check engine symbol. I’m hoping seafoam like your video shows, will help. I went through all this bullshit with my Prius. Carbon and oil build up in the throttle body, intake manifold, and EGR cooling system. So annoying. I thought Toyota was the best and I’ve had more problems and maintenance than any car I’ve owned. 😑
Huh? That’s not OEM. Did you install aftermarket part? Air filter will get dirty and they must be replaceable. Can you tell what’s brand name of that filter? In any case, you can use a shop vac to thoroughly vacuum the side of the filter where air goes in. Also vacuum the air filter housing as well.
@@DIYLifeSkillsi think he is talking about the carbon filter that is on top of the housing of the airbox on or 06 GS 300's. You can see it when you take off the airbox when changing the engine air filter. I removed mine (the carbon filter) a year ago, as it was very old and looked dirty. Needed to use a boxcutter to efficiently get to it, as it is not intended to be replaced or removed. If you are in a state w/inspections I'd keep it, but, if not, you can do so at your own risk. It is intended to supposed to filter pollutants out that escape from the intake after shutting your car off. After 17+ years in the car, though, I imagine it was either doing nothing or doing something perhaps harmful, so I took it out after doing some research on it.
I don’t understand the question. When you drive and press on gas pedal, throttle plate opens up to allow more air to come in. Also, when you drive, the car is constantly making adjustment to the throttle plate opening, including idle speed.
Manual says "When you push the "DISP" switch with the engine switch on, another outside temperature display appears on the multi-information display" ...and it shows a picture of the odometer and temperature. However, I started the engine, and pushed DISP switch but no temp appears. I used to have it until I replaced the battery recently. I'll try it again and let you know....strange.
To be honest, half the time I didn’t disconnect battery and it was just fine. I have updated video on cleaning the TB after removing it. Once you remove it, it gives you better access to the back side.
@@DIYLifeSkills so I finally cleaned the maf but I noticed the connection for the maf was really really dirty when I unplugged it, do I replace it or clean it?
What part of the connection was dirty? Outside dirty you can clean. But inside shouldn’t be dirty. Is it some kind of corrosion build up? If so, it may not send proper voltage signal back to accurately control the TB plate opening.
There is no formal idle relearn procedure for Lexus and Toyota. Throttle Body is constantly calibrating while the engine is running. You just drive normally after TB and MAF cleaning. If you spray too much into the TB, extra cleaning fluid can cause brief rough idle but it’ll settle down within minutes especially if you drive
@@Optimus_1LE Be specific to what "cuts power" mean? Are you saying electrical power goes out, or engine dies? Are you getting any check engine light? What year, model, and how many miles?
@@DIYLifeSkills I just did a GDI clean there wasn't much build up at all I cleaned the MAF it was kind caked in crap ha ha Doing an Oil Change also today letting drain for an hour while the cleaner heat soaks
Lots of things can effect the idling... What year and how many miles do you have? When was the spark plug changed? And do you use fuel-injector cleaner regularly? How was the idle RPM prior to cleaning? What is the RPM range now when it idles "bad"? On cold start, it's normal to see above 1000 RPM for nearly a minute and then it should gradually come down. Mine idles smoothly and it's around 600 to 650 RPM.
@@DIYLifeSkills Thanks for reply 👍🏻; It’s GS 300 it’s 2007 with nearly 200000km on it. I have done full service about 30k ago oil filters spark plugs battery etc (I’m changing oil regularly).., I don’t use injectors cleaner I only use fuel treatment “dipetane and when idling on neutral it’s ok when I put on D the idling arrow going up and down 800-650 shaking Al the car I tough it was the transmission problem but I watched your vid cleaned throttle and air flow sensor and was ok for few days and now is back again 🤷🏻♂️(maybe I need to clean butterfly better)…let me know what you think
@@paddy5141 Are you the original owner? How long ago did the rough idling start? Does it idle smoothly on warm start? Does it eventually idle smoothly after getting the coolant to normal operating temperature level? Meaning… you’ve driven it and the engine is still warm?
@@paddy5141 When I changed the spark plugs. I bought the slightly cheaper Denso Iridium plugs and this car was misfiring periodically and the gaps were off. I ended up returning them and getting the matching plugs and again I had to correct the gap setting on some of the plugs. Have you checked your ODB for any stores check engine light?
@@DIYLifeSkills I’m a third owner and car wasn’t looked after properly …it’s only bad when worm…when cold it’s ok. It’s started bad idling after service. Spark plugs are denso recommended…. Also you made me thinking now I replied battery for slightly stronger, yausa but amps higher a bit…🙋🏻♂️
