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Hmm, I just don't know where to start. Since the codes appeared after the install, I am thinking that replacing the knock sensor is not the root cause. The random severe throttle delay has me worried to.
 

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fix the stripped threads...that section is probably causing a boost leak and causing those codes. I'd bet money that if you did a boost leak test, youd have a leak right by the bolt
 

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I`m still driving with the mushroom valve gone and it´s holes closed with epoxy. No problems what so ever, engine runs great… no oil consumption or leaks
 

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Discussion Starter #564
I`m still driving with the mushroom valve gone and it´s holes closed with epoxy. No problems what so ever, engine runs great… no oil consumption or leaks
You really ought to consider that there was a very good reason for GM placing that valve there in the first place and designing the whole valve cover to manage vacuum. Oil consumption is in fact increased even if you don't notice small changes.

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So, I learned something today, make sure you get that valve tight! (tighter than I did obviously, was worried about the rubber washer) I am assuming it's what has been chucking oil on the back of my engine. It (may) have been the intake manifold gasket, but judging by the amount found, I doubt it. Got about another 3/4 turn on it and installed a new gasket and reassembled. Time will tell if that fixed it. I am about 50/50 on the cause, either was very likely my fault.

Edit: Also bought a $20 ebay wireless boroscope so I can check it every once in awhile among other uses lol.


View attachment 283340
So after a bit of time, still have a small seepage in the bottom left corner. Installed a new fel pro gasket as well. I will attach a picture of where it’s coming from. What is the part circled in yellow circle, just an alignment piece? Leak seems to come almost right from it. Is this just expected from running a 20 PSI tune?

283904
 

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Discussion Starter #566
So after a bit of time, still have a small seepage in the bottom left corner. Installed a new fel pro gasket as well. I will attach a picture of where it’s coming from. What is the part circled in yellow circle, just an alignment piece? Leak seems to come almost right from it. Is this just expected from running a 20 PSI tune?

View attachment 283904
I dont think so. I've had no leaks even while boost leak testing at 30psi.

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hi guys. greetings from Lithuania.
got problems with my encore with the same 1.4t engine. so first time i got problems with valve cover leaking, changed, run few months it blowed up again, after that i found info in this cruzetalk forum that i need to check membrane in inlet manifold, so there was no membrane in mine manifold, changed with another from 2016 encore with 15k miles. by the way i checked hose from turbo to inlet, valve works fine one way blows in another no.
after that i started to hear whistling sound from the front of engine, crankcase seal was failing, changed this too.
changed evap purge valve because of little leaking while it must be closed. but after these repairs,problem with p0171 still there.

another problem maybe no, when i pull out an oil dipstick there is very strong air sucking. its normal in these engines?
 

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Discussion Starter #569
and when i remove turbo hose from inlet there is always vacuum sucking in all various rpms its good? i posted two videos on youtube, links below.
vacuum
vacuum in inlet
Update : i plugged in my diagnostic tool so there you can see my system is too lean, uploaded video in youtube, link below
obd readings
There should always be a vacuum on the crankcase. Have you replace the corrugated hose? It tends to crack. You have a vacuum leak somewhere.

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Everything is fine with this hose.
yes, i know that there must be vacuum, but not too strong like in minei think. Have you watched video that i posted? its hard to take of an oil cap.
today i was lucky to catch a guy with the same car, so looked what is the vacuum pressure in his car, there was just a little vacuum suction from dipstick and oil cap.
so i think i got problem with my valve cover membrane, it is not regulating vacuum pressure in engine.
disassembled an old valve cover membrane, pushed it down to close channel above. so after that i was unable to suck air from the hole in the middle back where vacuum in manifold is sucking air from engine.
so i think there is my problem....
 

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So, today I've removed again the intake manifold to change the gasket because I've observed small oil leaks around the gasket after installed the v2 kit.
After removing the intake, a small amount of oil leaked from the intake. Is this normal? Or is this because my old gasket wasn't holding the pressure and messed up the oil separation?
 

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So, today I've removed again the intake manifold to change the gasket because I've observed small oil leaks around the gasket after installed the v2 kit.
After removing the intake, a small amount of oil leaked from the intake. Is this normal? Or is this because my old gasket wasn't holding the pressure and messed up the oil separation?
It's normal.

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Ordered the kit. I want to be ready when this happens, and I don't want to try to find all of the pieces myself. I may even do it as a preventative measure because I hate it when oil leaks all over everything.

Thank you, XR, for putting this all together.
I like to keep all of my stuff clean. I would like to do it as a preventative also
 
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