2002 GS430.

car will drive fine until all of the sudden it will lose power. power as in I'll press the pedal with little to no response. it will idle down(even while moving) then die or if I drop it into neutral it'll die right away. sometimes it'll start right back up but the last 2 times(about once a week or every 300 miles) it'll die but won't start until I let it sit for a few minutes. then it cranks right back up and drives fine. I should note when it does die and won't start back up that when this happens it'll turn over and crank but when the rpms come back down to idle after initial starting it goes straight down to die. instant on/off. crank-vroom-off.

I replaced the fuel pump and filter and checked all my vac hoses best I could. visually and with break cleaner to see if I could get an idle change while running.

Thoughts?

 

Hmmm maybe the oil control valve?

 

Does the check engine light come on? Have you had the car scanned for Diagnostic Trouble Codes?

 

Oil control valve?
No cel until last night on the way home. It didn't appear to effect the car until this afternoon. Now it won't start. Still cracks but dies instantly. Towing it to the shop and going to check this cel. Anyone think it could be O2 sensor?

 

Sounds like the infamous throttle control motor problem.

 

the car just started up no problems and no CEL.
how would I test that?

 

i doubt a o2 sensor would cause the car to die like that.

 

Definitely not an O2 sensor. The car will run fine with a bad O2 sensor. This sounds like a throttle, MAF or ignition (coil pack) issue. First step is to scan for codes and go from there.

 

somebody told me that their MAF went bad after cleaning their intake maybe because the filter wasn't dry enough and some oil got on the sensor ruining it. possibility?

also no codes and "currently" the car runs fine.

 

Try resetting ECU cant hurt

 

I disconnected the battery for a bit then plugged it back up when it first died and it wouldn't start. that didn't change anything.

 

Cleaned the maf. Runs fine. Let's see if it status that way

 

The th throttle body and motor are almost brand new. Guy before replaced it so it has less than 10k on it

 

so I put the stock aorbit on and finally got a code. P0172 &P0175. from what I've read it seems that it's the O2 sensors. which do I need? rockauto has them for the front and back. I'll post a link in the am if necessary.

ok, so the DIY is for a GS300. I assume that the other O2 is under the drivers side carpet. is this correct?
https://www.clublexus.com/forums/per...placement.html

also here are the O2's I've found. the 2 under the car would be the downtream left/right.
http://www.rockauto.com/catalog/raframecatalog.php?ck[ID]=0&ck[idlist]=0&ck[viewcurrency]=USD&ck[PHP_SESSION_ID]=33leuidi7v7ip9qftv0c0cqil5

 

O2 sensor error is usually a symptom, not the cause