What a difference cleaning the MAF and air filter makes...
01-26-10, 09:58 AM
#46
1999 gs 300 - Sorry for the large pics
It is real simple. Thought it would be a lot harder. I cleaned out my MAF and TB the other day. Hardest part I would say is the TB since you have to use a long stick or flat head with a soft cloth at the end to clean deep inside. I use TB and Air filter cleaner by STP and CRC MAF. Here are the two pics of the products I bought both from autozone.
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01-26-10, 10:45 AM
#47
It is real simple. Thought it would be a lot harder. I cleaned out my MAF and TB the other day. Hardest part I would say is the TB since you have to use a long stick or flat head with a soft cloth at the end to clean deep inside. I use TB and Air filter cleaner by STP and CRC MAF. Here are the two pics of the products I bought both from autozone.
and
and
01-26-10, 09:56 PM
#49
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rebuilding and cleaning the T/B will increase gas mileage and also throttle response in some cases... But should only clean the MAF sensor with Alcohol, the sensor is very sensitive and some cleaners leave a film that attracts dirt and grim....
01-26-10, 10:05 PM
#50
Pole Position
Im sticking with CRC maf cleaner. Aint trying to apply Alcohol. The Spray works the best.
03-20-10, 06:05 PM
#53
What kind of air flow sensor do GS 300's have because I bought the CRC stuff and it said not to use on Karman Vortex sensors. It specifically said supras and most Lexus vehicles. I found literature that said 2jz-ge and 1uz-fe's have it, I'm sure they were referring to gen I ge's. I don't know if Lexus changed it for gen II engines. JeffT where are you?
03-20-10, 06:08 PM
#54
What kind of air flow sensor do GS 300's have because I bought the CRC stuff and it said not to use on Karman Vortex sensors. It specifically said supras and most Lexus vehicles. I found literature that said 2jz-ge and 1uz-fe's have it, I'm sure they were referring to gen I ge's. I don't know if Lexus changed it for gen II engines. JeffT where are you?
03-31-10, 06:45 PM
#55
So I decided to clean my MAF & TB but the results do not appear to be good. I bought CRC MAF cleaner also CRC TB cleaner for the job. I started by removing the negative battery cable and the 20 amp fuse to reset the ECU while I cleaned. I remove the screws and unloosen clamps as mentioned in the DIY. I then unscrew and remove the MAF sensor and sprayed it about three times. I did not drown it in fluid but just did 3 small quick sprays and allowed it to air dry. For the TB, I used the TB cleaner and sprayed it it on the cotton towel and then wiped inside of it. I also sprayed a little bit of it inside on the metal flap twice to remove additional gunk and then wiped with the towel. After making sure all was dry, I installed everything back and started the car. Immediately I noticed a difference in how the car felt during idle. I've always had a smooth idle but now it is rough. I figure I give it a few minutes but that didn't help. So I take it for a spin and the rough idle continued. Even at a red light with my foot on the brake, the car felt rough. I drove on regular streets and also went on the highway for a total of about 15 minutes. The car seems to accelerate much quicker which may be the result of the ecu being reset. A little too late now but I'll double check everything tomorrow to make sure I didn't miss anything. I read on another thread that car will need to get "accustomed" after the cleaning I did. Just want to know if anyone experienced this after cleaning those parts and what was done to resolve it. Any tips would be helpful.
03-31-10, 10:03 PM
#56
So I decided to clean my MAF & TB but the results do not appear to be good. I bought CRC MAF cleaner also CRC TB cleaner for the job. I started by removing the negative battery cable and the 20 amp fuse to reset the ECU while I cleaned. I remove the screws and unloosen clamps as mentioned in the DIY. I then unscrew and remove the MAF sensor and sprayed it about three times. I did not drown it in fluid but just did 3 small quick sprays and allowed it to air dry. For the TB, I used the TB cleaner and sprayed it it on the cotton towel and then wiped inside of it. I also sprayed a little bit of it inside on the metal flap twice to remove additional gunk and then wiped with the towel. After making sure all was dry, I installed everything back and started the car. Immediately I noticed a difference in how the car felt during idle. I've always had a smooth idle but now it is rough. I figure I give it a few minutes but that didn't help. So I take it for a spin and the rough idle continued. Even at a red light with my foot on the brake, the car felt rough. I drove on regular streets and also went on the highway for a total of about 15 minutes. The car seems to accelerate much quicker which may be the result of the ecu being reset. A little too late now but I'll double check everything tomorrow to make sure I didn't miss anything. I read on another thread that car will need to get "accustomed" after the cleaning I did. Just want to know if anyone experienced this after cleaning those parts and what was done to resolve it. Any tips would be helpful.
03-31-10, 10:42 PM
#57
Cars with Electronic Throttle Control (Drive-by-wire) should not be cleaned with any types solvents at all. You will mess up the electrical system and will cause the car to go into limp mode as it runs rough as stated above.
I believe the best way to clean it would be just wipe it clean with a clean rag and that's it.
I believe the best way to clean it would be just wipe it clean with a clean rag and that's it.
04-01-10, 09:01 AM
#59
I'll let it stay as is for a few more days and then remove the stb out to see if this has something to do with it. Mind you while on the highway I was pushing hard at times doing 80-90 to test things out and my fuel gauge appears to not have budged much after the cleaning. For now at least it appears something good may have come out of this cleaning I did.Cars with Electronic Throttle Control (Drive-by-wire) should not be cleaned with any types solvents at all. You will mess up the electrical system and will cause the car to go into limp mode as it runs rough as stated above.
I believe the best way to clean it would be just wipe it clean with a clean rag and that's it.
I believe the best way to clean it would be just wipe it clean with a clean rag and that's it.
04-01-10, 12:43 PM
#60
If I can recall correctly, the last time I had cleaned the MAF and throttle body and reset the ECU, the GS did drive a bit differently at first but I definitely did not experience any rough idle or vibration. When I had the CEL pop up months ago, the car did idle very high and the transmission was very abrupt/clunky when shifting from P to D or P to R. I would hear/feel a clunk when shifting between gears. You might want to use an OBDII scanning tool to see if you can pull any codes.