jeromekim

You can remove the driver side OCV by removing that one bolt, and then creating enough space to just slide/wiggle it out. I had to unscrew two 10mm bolts holding down a bunch of wires in order to lift the wires enough to be able to slide the OCV under them. I actually took mine out, cleaned it with break cleaner and Seafoam, and put it back in, and I haven't had any problems after that.

I had the exact same symptoms as Salil022, same codes and everything. Cleaning the driver side OCV has thus far fixed my issue. I am planning on replacing it shortly. From other discussions, and my own personal experience with simply cleaning the OCV, I believe the OCV alone will solve these issues for the majority of people. I have a 2000 gs400 with 146k miles.

Snguyen408

i had the same problem. i changed the vvti solenoid & electronic trottle control motor. now my car runs like a champ again

Clifton

Without reading every post. The VTC can be a problem. There is an oil filter screen under the front cam covers that are a PITA to get to. If you are doing the timing belt is isn't too bad. If these get sludge from a previous owner not staying on top of the oil chages it is guaranteed to be them. they will restrict the oil to the solenoid and cause them to take too long, the VTC sensor expects it to happen but it lags. I think I posted on this and may have even put up a pic. If this is your problem, they can be easily cleaned with brake cleaner, it';s just the getting them out that is a PITA. I stated throwing the code around 105,000 miles. I would reset and it would come back the next day.

delos

iTrader: (1)

All of these come on today.

I would appreciate it if you could send me those pictures. I will see if I can salvage this myself.

Thanks in advance.

GoukiR

My lights just turned on... :T can I get a pic of the ocv so I know what to clean? Lol

gsCrazy

iTrader: (1)

any one have a diagram of where the ocv is?

kevwats01

iTrader: (5)

Variable valve timing actuator positioning sensor

stealership charged me $130 a piece...

Needed my car..

sakataj

iTrader: (182)

https://www.clublexus.com/forums/per...ve-filter.html

post # 67 i did a detailed write up for the gs400/gs430 models but the whole thread was written for the gs300

LEXISM

iTrader: (2)

Sorry guys but what is "OVC"?
I have the cel vsc lights on
The shops says my cars compression is low, the not so funny thing is that I went in To do my smog and my car has alway ran good with no issues and today after the diagnostics/compression check I'm having loss of power while driving! I'm really frustrated at the moment!
I go in for a smog and now my baby's not running right. Please help

GSGenesis

You mean OCV, oil control valve....

ronsmoove

I had the same problem with my car. Took it to the shop and found out it was OCV valve. Got it replaced and now runs fine. but before, when i start the car it ran fine and then when it got to warm running temperature, it would start shaking really bad especially at stop lights.

KeyKeeper

Until the engine reaches normal operation temperature, the ecm runs in "open loop" e.g. preset parameters programmed into the ECM prom. Once operating temperature is reached, it then switched to closed loop and actually uses I/O signals from your sensors to trim fuel/timing/adjust intake valve timing/adjust shifts/control externals e.g. cooling fans.

When its cold, it runs as programed....once warm, it only runs how the sensors tell the ECM to run. Hence decent cold run....crappy warm/hot run.

Just my .02c