Z22SE For one year now I can't still make my car run smoothly

#41
Make a new livedata after ECU reset by disconnecing the battery terminal for some time (~30 minutes) to see whether the fuel trims are changed or not. The build up on all plugs should not be the effect of one leaky injector. Anyway, how about you plugs now?
Two Black with sut on them, one brown and has lots of buildup and one brown without buildup (I'll have to get new plugs before continuing to test), but the oil in the intake is very scary
 
#42
id says pvc , I have had this too oil in my inlet manifold ,and it was a brand new gm pvc , I got p**sed off with it , filled it with silicone and ran a catch can,,,
 
#43
id says pvc , I have had this too oil in my inlet manifold ,and it was a brand new gm pvc , I got p**sed off with it , filled it with silicone and ran a catch can,,,
But the oil fumes are coming out of everwhere, air intake pipe, around valve cover, out of valve cover :D I'm pretty sure my PCV system is clogged solid
 
#44
if I were you id take manifold off ,give it a good degrease then blast out with pressure washer, there will be years worth of crud inside ,, fit new pvc , clean throttle body ,, fit back together with new gaskets ,then check for air leaks using carb cleaner spraying along manifold and throttle body, air leaks will make it run crap,,
 
#46
I have Oil all over the valves, My intake is bathing in oil, two spark plugs are burned in oil, my engine looks like it has parkinsons on idle and if you floor it - it's better to just run besides my astra, it consumes 1L in around 100km... Is my engine just ... dying on me ? Do I seriously dont have any other chance exept rebuilding it or swaping in something else?
 
#48
the inlet manifolds do tend to fill up with oil after many miles, it is caused by the PCV system.
I blocked off egr pipe that goes into the inlet and removed the pcv pipe that goes into air inlet, what other things I should or could do to solve this oil problem? Maybe that hole drilled into the valve cover in the middle and route it into a catch can or back into the oil pan?
 

Berto

Regular Member
#49
I have Oil all over the valves, My intake is bathing in oil, two spark plugs are burned in oil, my engine looks like it has parkinsons on idle and if you floor it - it's better to just run besides my astra, it consumes 1L in around 100km ...
^ Sounds like loads of blow-by generating loads of crankcase pressure that isn't properly evacuated and wreaks havoc inside the engine, compounded by stuck oil control rings (common on high mileage Z22SEs due to the defective piston design, see here).

If I were you I'd first reconnect the pre-throttle crankcase breather hose (the one that goes from cam cover to the airbox<=>TB pipe).

Then remove the intake manifold to check that the metered orifice is unobstructed, clearing if necessary.

And/or do a post-throttle cranckcase evacuation enhancement, or what's called a "PCV by-pass" here around. See here and here.
 
#50
^ Sounds like loads of blow-by generating loads of crankcase pressure that isn't properly evacuated and wreaks havoc inside the engine, compounded by stuck oil control rings (common on high mileage Z22SEs due to the defective piston design, see here).

If I were you I'd first reconnect the pre-throttle crankcase breather hose (the one that goes from cam cover to the airbox<=>TB pipe).

Then remove the intake manifold to check that the metered orifice is unobstructed, clearing if necessary.

And/or do a post-throttle cranckcase evacuation enhancement, or what's called a "PCV by-pass" here around. See here and here.
I will be doing the by-pass but I was thinking of putting a catch can to collect oil from both breather-hose and by-pass.
Also, could you take a look at my post in "Engine" subforum? Thank you a lot
 

Berto

Regular Member
#51
^ Carch cans are a nice idea, but make sure that they are of reasonable quality and don't leak any vacuum, particularly the one on the post-throttle line. Beware that the typical cheap catch-cans from ebay are hopeless pieces of crap that will leak vacuum like sieves.

Forgot to mention that a thicker oil would help, I run my 240K+ km Z22SE on 5W50.

Not sure what post you mean. please paste a link to it.
 
#52
^ Carch cans are a nice idea, but make sure that they are of reasonable quality and don't leak any vacuum, particularly the one on the post-throttle line. Beware that the typical cheap catch-cans from ebay are hopeless pieces of crap that will leak vacuum like sieves.

Forgot to mention that a thicker oil would help, I run my 240K+ km Z22SE on 5W50.

Not sure what post you mean. please paste a link to it.
https://z22se.co.uk/threads/whats-this-connector-dangling-in-the-end-of-the-engine.29647/
Thank you ❤
 
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