Possible Ocv Oil Control Valve Issues

[Jason G.]

Does anyone know how many OCVs a 2001 IS300 has. I talked to the parts rep at the dealer yesterday and he said there was one. Today I called and a different person said there were two. I was calling today to see if my car has a OCV filter which he said it didnt. I have located one on the drivers side by the timing cover in the front of the car. I have trouble codes 1349 and misfirings in all cylinders. It started tuesday after i got gas. It idles real rough after it warms up, but is fine before it warms up. Additive was added to the fuel yesterday to be sure their was no water in the gas tank, but it didnt help. My two repair guys who have 20yrs experience and have done great work for me before were stumped and were not familiar witht that code and didnt want to mess with it cuz they were not familiar with OCV and not very familiar with VVT cars. Oh, I have 182,000 miles on it and have replaced the readiator, water pump, thermostat, and timing belt in the past 2 months. From what i can see the timing belt has not jumped any teeth and is all lined up.

[Jason G.]

Went to the dealer and got a new OCV and installed it(The filter was clean and fine & they didnt have it in stock even though I was going to replace if they did have it). When I started the car it jumped up to 2100rpms for about 30 seconds then jumped backed down to normal. I let the car warm up and then went and test drove it for about 5/10 minutes and got over the 40mph for a bit in stop and go traffic and it was fine during the 15 minutes it was running. Seems to have fixed the problem. I do hear the injectors more and another sound (not sure what) that almost sounds like a vacuum leak but I am not sure where or what it is. It sounds louder by the timing belt casing. I did not remove any hoses. The injectors i can possibly attribute to the cleaner they put in the gas. Ill clear the codes in the morning and see if anything pops up again. I did have codes p0420 & p0440 before all this. If I cleared the codes they would not pop up again for 2 days to a week, but the car ran fine. Mechanics couldnt find the problem. They said I would have to wait till it became a bigger problem. One shop suggested the 2 cats on the manifold could be going out but that is $500-$800 just for the part. Im not throwing that kind of money around without being for sure its the problem. Any suggestions on any of this would be helpful. Thanks.

[IanH]

yes the P0420 is cat inefficiency, and refers to the B2S2 under the car, I believe P0430 is the other second O2,B1S2.

I also was not interested in dropping $1500 - 2000 for the manifold and second cat and Y pipe under the car. (don't know where you got your number ???)

I got two Stainless steel O2 cheaters for about $25 delivered. The guy was on eBay but moved to his own web site because of the reg's covering this stuff. If you cant find the part I will find web site for you.

This fixed it permanently..... BTW I Had about 145K when this happened.

Also can be caused by exhaust leaks, check for holes and bad gaskets.

Re other code, you will have to look it up, sorry.