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@2013FSport Maybe I just got a bad 250 lol, your 350's engine bay is looking pristine though !
@s3v3n The breather hose is the little small hose we are talking about, with the gap? And I was definitely thinking of buying that stainless steel wire clamp as well but was uneasy about possibly tightening too much since that wire clamp provides the intended amount of force needed for that hose..
@MikeFig82 While I source a replacement & try to get it snug as possible in there, would a zip-tie work for now if I tie to one of the loops on wire clamp to help pull it into the intake? Won't look pretty, but I don't take her out anymore, so not concerned about looks just functionality.
Thank you all so much for your help & recommendations ! Looking forward to getting this resolved soon.
@2013FSport Maybe I just got a bad 250 lol, your 350's engine bay is looking pristine though !
@s3v3n The breather hose is the little small hose we are talking about, with the gap? And I was definitely thinking of buying that stainless steel wire clamp as well but was uneasy about possibly tightening too much since that wire clamp provides the intended amount of force needed for that hose..
@MikeFig82 While I source a replacement & try to get it snug as possible in there, would a zip-tie work for now if I tie to one of the loops on wire clamp to help pull it into the intake? Won't look pretty, but I don't take her out anymore, so not concerned about looks just functionality.
Thank you all so much for your help & recommendations ! Looking forward to getting this resolved soon.
From your original picture it looks like it had a perfect seal. What I'm referring to in install the hose to the valve cover breather then to intake pipe. You want to back off the spring clamps form the hoses untill you clear the length of the fittings. Meaning the hose itself can rotate freely to its natural molded state. You may have to rotate the hose at each end. It should form a closed gap again at the intake pipe. Then just clamp it back up.
When you install it with clamps then insert the fitting the hose will be cocked crooked. Since the hose is so stiff it will be pulling the fitting out. As shown in your previous last photos.
The last thing you want is a vaccum leak. As this will be unmetered by the MAF. Not sure if it makes sense as it's the best way I can explain it.
That plastic part might be broken or got detached??
Here is the pic of my old grumpy 08 IS350 hose and there should be no gap in between that cone-shaped plastic and the tube housing.
No worries....
This still doesn't seem right tho.
When its idling take paper tube from say an empty roll of paper towels. Place it over the suspect area and the other end to your ear. Give it a listen for a whistle sound.
@MikeFig82 I apologize for the miscommunication, that picture of the entire engine bay was a pic I took off google to quickly reply and reference which hoses I assumed you were speaking of during our last posts. So yes, that one looks to be sealed but mine has looked a little loose since I did my spark plugs 4 months ago.. I will be able to work on that hose sunday morning & see if I can get it fit perfectly with any gaps.
@2013FSport Thank you for that tip, just finished a roll of paper towels so will use that to give it a quick listen for any whistling tomorrow night after work.
Assuming I do get the hose to fit perfectly, it the code P0100 persists, would the next likely culprit be that screw that the head broke off of when tightening the intake valve cover back down?
Although I already got rid of the other code related to gas cap, I replaced my gas cap just in case to prevent it coming back anytime in near future hopefully.
@MikeFig82 I apologize for the miscommunication, that picture of the entire engine bay was a pic I took off google to quickly reply and reference which hoses I assumed you were speaking of during our last posts. So yes, that one looks to be sealed but mine has looked a little loose since I did my spark plugs 4 months ago.. I will be able to work on that hose sunday morning & see if I can get it fit perfectly with any gaps.
@2013FSport Thank you for that tip, just finished a roll of paper towels so will use that to give it a quick listen for any whistling tomorrow night after work.
Assuming I do get the hose to fit perfectly, it the code P0100 persists, would the next likely culprit be that screw that the head broke off of when tightening the intake cover back down?
Although I already got rid of the other code related to gas cap, I replaced my gas cap just in case to prevent it coming back anytime in near future hopefully.
That would be a candidate I'd look at. You said, the head popped off? Maybe you can extract it with some needle nose?
Alrighty, I went ahead and cleaned off hose & adjusted it until it was as flush as possible. Reset w/ob2 and still have code.. so unfortunately think I will have to replace or just try and get that screw out of intake cover to replace as well.. Worst case, I'll just take it all off again & replace gaskets & screws..
Lexus passed emissions today even with CEL. So thats a positive. Might let shop replace OCV's and see what happens if replacing intake screws & gasket doesn't work.
Thank you all for your help!
This angle is from the top and it shows a very slight gap against opening.. Right side of picture shows gap is pretty much flush against opening on sides
It looks like the breather hose is just stiff now. Pulling on the actual fitting enough to open it slightly. Since it's pushing into rubber the outlet barb will still seal correctly. I think it goes in about 3/4" to 1" deep?
As for the OCV swap the two intakes around. Passenger side to driver side. If the code jumps to bank 2 then it's the OCV. Another it could be blockage at the OCV filters? The driver side is a bit tricky. The bolt is slightly under the intake manifold. Use the picture I referenced from my previous post. The mark up is of the intake OCV's.
Last edited by MikeFig82; Apr 25, 2022 at 04:21 PM.
Do yourself a favor and purchase on eBay or Amazon even a homemade smoke machine if you don't want to buy what is technicisons use. Our is around 700 dollars. I have even made my own with a diesel glow plug and an old computer power supply. Just make sure you regulate your air compressor to no more than 2 psi. I have a feeling is a vacuum leak based on reading all this quickly. Lexus technican btw
Ok I see. Go back and make sure the intake hose is on correctly. While at it make sure the hose that runs under the intake hose didn't become disconnected from the hard line. Trace it to the body near the body of the shock mounts. This ID the purge valve hose that draws vapors from the gas tank.
Make sure the intake hose clamp is not too tight on the air box lid. Going to town on it doesn't provide a better seal. It will just crush the outlet pipe. You just want to snug it up a tad. Same for the TB side. The rubber once hot will shrink and provide a good seal. Last check the small hose from valve cover breather to intake make sure it's clamped on good too.
Once all said and done I'd reset the fuel trims as well. Since it's been getting bad data for awhile.
Clean the MAF with CRC cleaner only.
Bad screw on intake manifold? Which area?
do you happen to know the inner diameter of the hose (the hose size) of the hoses underneath the intake tube?
do you happen to know the inner diameter of the hose (the hose size) of the hoses underneath the intake tube?
If you're talking about the purge line hose. I'll have to check again. I think it's 8mm ID off the top of my head. If you have a caliper measure the barb fitting on the purge valve. The straight shift should be 8mm, but the barb itself could be closer to 9-10mm.
Last edited by MikeFig82; May 2, 2022 at 05:07 PM.
lol, your 350's engine bay is looking pristine though !
