Throttle Body & MAF Sensor Cleaning

[eleveneleven]

Hi all 

Going to attempt to clean the throttle body and MAF sensor at some point. Just wanted to clear a few things up before I do it. 

- I've seen people using wd40 to clean thier MAF sensor is this safe or should I just buy a dedicated maf sensor cleaner? 

- Do I need to disconnect the Battery before cleaning MAF & TB? 

- Is it OK for me to open the butterfly plate on the throttle body by hand or should I just leave it closed. 

This will be the first time attempting this and I'm far from handy with a spanner  so any other tips of things to consider would be great

Thanks. 

 

 

[Mr Vlad]

Hi Lee. Do Not use WD40 on the MAF sensor. Use a dedicated spray.

As for the throttle butterfly valve. Unplug the multiplug first before you touch the butterfly. Otherwise it'll screw up what the ECU sees and really make the car run rough. Use a dedicated spray for the butterfly. 

Let the MAF dry in air. Do Not touch the thin wires. Oh don't forget to plug it back when it's dry and you've put it back in its housing. I forgot and my car ran like pooh.

Once you've cleaned the items and you start the car there's a chance the revs are high. They were on mine. I did a post on Throttle body Re Learn. I'm krap at finding posts but look it up. It'll save headaches. 

[KASTOR]

ONLY USE THROTTLE CLEANER SUGGESTS REPLACEMENT OF PCV

VALVE

[KASTOR]

TOYOTA Lexus GENUINE Pcv Valve GS300 IS300 IS250 GS350 RX350 OEM 12204-31040

[KASTOR]

http://TOYOTA Lexus GENUINE Pcv Valve GS300 IS300 IS250 GS350 RX350 OEM 12204-31040

[eleveneleven]

On 3/17/2023 at 12:19 PM, Mr Vlad said:

Hi Lee. Do Not use WD40 on the MAF sensor. Use a dedicated spray.

As for the throttle butterfly valve. Unplug the multiplug first before you touch the butterfly. Otherwise it'll screw up what the ECU sees and really make the car run rough. Use a dedicated spray for the butterfly. 

Let the MAF dry in air. Do Not touch the thin wires. Oh don't forget to plug it back when it's dry and you've put it back in its housing. I forgot and my car ran like pooh.

Once you've cleaned the items and you start the car there's a chance the revs are high. They were on mine. I did a post on Throttle body Re Learn. I'm krap at finding posts but look it up. It'll save headaches. 

Thanks Vlad I appreciate the advice. Will get some dedicated sprays then and give it a go when we get some dry weather. 🤞

[Mr Vlad]

No problem Lee. I think you're relatively close to me in Rochdale and our weather is more dull than not. 

As for the sprays I use CRC as I found it got the best reviews from different articles. Got mine from eBay.