drewefx

I cleaned my TB just like the way everyone on here says it should be done Spray TB cleaner in the bullet looking thingy), right after I satrted my car and it ran rough but then it came back to normal with a CEl and then after 2 miles the CEL went off. Now at stop the idle went low and now when i turn the wheel the Battery light comes on. But when i move, off it goes. What did i do wrong?

Drag On

First, quit panic'ing.

Second - make sure all of your stuff is hooked up properly and tight, then reset the battery, then try again.

rra640

The bullet looking thingy is your Mass Airflow Sensor. You should use an cleaner for electrical parts or MAF cleaner on that piece. The TB is the large opening where the air intake tube hooks up to. There is a butterfly in the opening that you can open with your finger to clean it out. You use TB cleaner or carb clearner here.

Disconnect your negative batter for a few minutes and reinstall. It will be hard to start and rough at first. It should clear up. Make sure all your electrical connections are back in tight and correctly.

drewefx

Ok guys, the car died on me finally and I had that feeling it was gonna happen. Tech says that one of the components (power steering pump, altntr, etc) where the belt goes thru is not spinning to spec and when i turn the wheel the whole entire belt stops spinning but the car runs normal. He thinks its the power steer pump that the shafts are broken. So he will let me know how much one of those costs tomorrow. The weird thing i find is that when i pull the cable for gas inside the hood to rave up the engine, the belt does not go as fast the engine. It stays at the same speed. Is that normal? I ask cause in my grand am, when you rave up the engine, the belt spins faster. Are they different in lexuses or is there a major engine broken something?

SlvrGS300

iTrader: (7)

check the serpentine belt tensioner. the bearings went on mine. eventually it got so bad that the tensioner bearings disintegrated, locking up the tensioner and throwing off the belt.

nanotech

iTrader: (2)

Can anyone post a pic indicating where the MAF and the TB are located under the hood?

What is the best type of material/spray i can use to clean the two out. I have the VSC and No VSC problem right now.

kit cat

iTrader: (6)

http://youtube.com/watch?v=KwdYzWzc170

i suggested MAF and TB cleaning but it may not be the case for you. Now with that said, be extremely careful with the MAF. It's fraigle and expensive. TB should be straight forward. if youre not sure, try to get some friends over.

Debonair

Here is a pic i borrowed from one of SlvrGS300's posts. RED is around the MAF, GREEN around the throttle body. This is a GS30 only of course.

nanotech

iTrader: (2)

thanks for the pic but i need a GS400 engine bay pic with the highlighted fields.

IS3_FTW

iTrader: (3)

Isnt it the same I know that the 400 engine is bigger, but shouldnt the MAF sensor and the TB be in the same general area?

Look in your engine, if you see a black flat box on your intake tube, then thats the MAF. And where the intake tube goes into, thats your TB. Its that simple

Debonair

Pic borrowed from 1SickGoat

nanotech

iTrader: (2)

Thanks for all the pics guys...but the problem wasn't none of that.

It was simply my battery. I put a new battery in and "BAMM" my light is off.

Can't believe it was that simple...i was getting so worried.

Well everything seems right now and i am extremely excited!

Thanks again!

Frankdorn

iTrader: (7)

What's the long black box parallel to the manifold between the green and red squares?

SeattleGS400

iTrader: (1)

See the blow-up diagrams in this MAF and throttle body cleaning post for the 1U-ZFE V8 engine:

https://www.clublexus.com/forums/sho...d.php?t=345147

GSteg

iTrader: (15)

Mainly a resonator for the intake, which happens to work nicely as a vacuum source